/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-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:22:44,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:22:44,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:22:44,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 21:22:44,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 21:22:44,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 21:22:44,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 21:22:44,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 21:22:44,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 21:22:44,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 21:22:44,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 21:22:44,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 21:22:44,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:22:44,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:22:44,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:22:44,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:22:44,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:22:44,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:22:44,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:22:45,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:22:45,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:22:45,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:22:45,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:22:45,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:22:45,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:22:45,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:22:45,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:22:45,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:22:45,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:22:45,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:22:45,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:22:45,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:22:45,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:22:45,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:22:45,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:22:45,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:22:45,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:22:45,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:22:45,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:22:45,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:22:45,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:22:45,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:22:45,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:22:45,096 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:22:45,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:22:45,096 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:22:45,097 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:22:45,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:22:45,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:22:45,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:22:45,098 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:22:45,099 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:22:45,099 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:22:45,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:22:45,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:22:45,100 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:22:45,100 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:22:45,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:22:45,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:22:45,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:22:45,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:22:45,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:22:45,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:22:45,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:22:45,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:22:45,102 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:22:45,102 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:22:45,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:22:45,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:22:45,103 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:22:45,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:22:45,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:22:45,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:22:45,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:22:45,567 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:22:45,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-13 21:22:45,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dd4eeb6e/68481af097e74bb8a3fb8ddaa501a2ec/FLAG0572ebe2c [2021-10-13 21:22:46,305 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:22:46,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2021-10-13 21:22:46,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dd4eeb6e/68481af097e74bb8a3fb8ddaa501a2ec/FLAG0572ebe2c [2021-10-13 21:22:46,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dd4eeb6e/68481af097e74bb8a3fb8ddaa501a2ec [2021-10-13 21:22:46,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:22:46,655 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:22:46,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:22:46,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:22:46,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:22:46,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:46,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c21b233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46, skipping insertion in model container [2021-10-13 21:22:46,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:46,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:22:46,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:22:46,872 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-sum-array-hom.wvr.c[2396,2409] [2021-10-13 21:22:46,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:46,898 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:22:46,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:22:46,920 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-sum-array-hom.wvr.c[2396,2409] [2021-10-13 21:22:46,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:46,932 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:22:46,959 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-sum-array-hom.wvr.c[2396,2409] [2021-10-13 21:22:46,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:22:46,989 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:22:46,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46 WrapperNode [2021-10-13 21:22:46,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:22:46,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:22:46,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:22:46,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:22:47,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:22:47,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:22:47,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:22:47,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:22:47,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:22:47,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:22:47,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:22:47,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:22:47,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (1/1) ... [2021-10-13 21:22:47,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:22:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:22:47,227 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) [2021-10-13 21:22:47,258 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 [2021-10-13 21:22:47,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:22:47,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:22:47,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:22:47,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:22:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:22:47,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:22:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:22:47,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:22:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:22:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:22:47,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:22:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:22:47,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:22:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:22:47,343 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:22:47,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:22:47,938 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 21:22:47,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:22:47 BoogieIcfgContainer [2021-10-13 21:22:47,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:22:47,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:22:47,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:22:47,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:22:47,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:22:46" (1/3) ... [2021-10-13 21:22:47,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542534e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:22:47, skipping insertion in model container [2021-10-13 21:22:47,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:22:46" (2/3) ... [2021-10-13 21:22:47,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542534e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:22:47, skipping insertion in model container [2021-10-13 21:22:47,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:22:47" (3/3) ... [2021-10-13 21:22:47,951 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2021-10-13 21:22:47,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:22:47,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-13 21:22:47,958 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:22:47,998 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:47,998 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:47,999 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:47,999 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:47,999 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,000 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,000 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,000 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,000 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,001 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,001 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,001 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,002 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,002 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,002 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,003 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,003 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,003 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,003 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,004 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,004 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,004 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,005 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,005 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,005 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,005 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,005 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,006 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,006 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,006 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,007 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,007 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,007 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,007 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,008 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,008 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,008 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,009 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,009 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,010 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,010 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,010 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,011 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,011 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,011 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,012 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,012 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,012 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,012 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,012 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,013 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,013 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,013 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,013 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,014 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,014 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,014 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,016 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,016 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,017 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,018 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,018 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,018 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,019 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,019 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,020 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,020 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,020 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,021 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,021 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,022 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,022 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,022 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,026 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,026 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,026 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,027 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,027 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,033 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,034 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,034 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,035 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,037 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,038 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,038 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,038 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,039 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:22:48,046 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 21:22:48,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:22:48,123 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 [2021-10-13 21:22:48,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-13 21:22:48,143 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:22:48,156 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 167 transitions, 358 flow [2021-10-13 21:22:48,159 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 167 transitions, 358 flow [2021-10-13 21:22:48,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 167 transitions, 358 flow [2021-10-13 21:22:48,237 INFO L129 PetriNetUnfolder]: 12/164 cut-off events. [2021-10-13 21:22:48,237 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 21:22:48,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 164 events. 12/164 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 196 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2021-10-13 21:22:48,250 INFO L116 LiptonReduction]: Number of co-enabled transitions 2688 [2021-10-13 21:23:09,692 INFO L131 LiptonReduction]: Checked pairs total: 3264 [2021-10-13 21:23:09,693 INFO L133 LiptonReduction]: Total number of compositions: 169 [2021-10-13 21:23:09,703 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2021-10-13 21:23:09,764 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:09,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:09,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:09,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash 20096, now seen corresponding path program 1 times [2021-10-13 21:23:09,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:09,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522606040] [2021-10-13 21:23:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:09,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:09,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:09,804 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) [2021-10-13 21:23:09,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:23:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:23:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:10,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:10,413 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:10,415 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 [2021-10-13 21:23:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:10,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:10,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:10,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522606040] [2021-10-13 21:23:10,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522606040] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:10,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:10,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400924617] [2021-10-13 21:23:10,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:10,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:10,697 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 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) [2021-10-13 21:23:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:11,224 INFO L93 Difference]: Finished difference Result 1498 states and 5133 transitions. [2021-10-13 21:23:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:11,229 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 [2021-10-13 21:23:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:11,273 INFO L225 Difference]: With dead ends: 1498 [2021-10-13 21:23:11,273 INFO L226 Difference]: Without dead ends: 1498 [2021-10-13 21:23:11,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-10-13 21:23:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 751. [2021-10-13 21:23:11,440 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) [2021-10-13 21:23:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2575 transitions. [2021-10-13 21:23:11,449 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2575 transitions. Word has length 2 [2021-10-13 21:23:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:11,451 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2575 transitions. [2021-10-13 21:23:11,451 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) [2021-10-13 21:23:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2575 transitions. [2021-10-13 21:23:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:11,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:11,453 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:11,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 21:23:11,654 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 [2021-10-13 21:23:11,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 20097, now seen corresponding path program 1 times [2021-10-13 21:23:11,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:11,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842778899] [2021-10-13 21:23:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:11,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:11,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:11,662 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) [2021-10-13 21:23:11,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:23:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:23:11,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:11,816 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:23:11,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:23:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:11,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:11,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:11,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842778899] [2021-10-13 21:23:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842778899] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:11,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:11,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:23:11,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755687671] [2021-10-13 21:23:11,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:23:11,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:23:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:11,889 INFO L87 Difference]: Start difference. First operand 751 states and 2575 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) [2021-10-13 21:23:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:12,046 INFO L93 Difference]: Finished difference Result 750 states and 2572 transitions. [2021-10-13 21:23:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:12,047 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 [2021-10-13 21:23:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:12,058 INFO L225 Difference]: With dead ends: 750 [2021-10-13 21:23:12,058 INFO L226 Difference]: Without dead ends: 750 [2021-10-13 21:23:12,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-10-13 21:23:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-10-13 21:23:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 618 states have (on average 4.1618122977346275) internal successors, (2572), 749 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) [2021-10-13 21:23:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2572 transitions. [2021-10-13 21:23:12,099 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2572 transitions. Word has length 2 [2021-10-13 21:23:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2572 transitions. [2021-10-13 21:23:12,109 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) [2021-10-13 21:23:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2572 transitions. [2021-10-13 21:23:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:12,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:12,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:12,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:12,322 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 [2021-10-13 21:23:12,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 20213, now seen corresponding path program 1 times [2021-10-13 21:23:12,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:12,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284475700] [2021-10-13 21:23:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:12,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:12,333 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) [2021-10-13 21:23:12,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:23:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:23:12,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:12,547 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-13 21:23:12,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 54 [2021-10-13 21:23:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:12,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:12,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284475700] [2021-10-13 21:23:12,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284475700] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:12,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:12,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:12,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888088557] [2021-10-13 21:23:12,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:12,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:12,708 INFO L87 Difference]: Start difference. First operand 750 states and 2572 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) [2021-10-13 21:23:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:12,868 INFO L93 Difference]: Finished difference Result 624 states and 2069 transitions. [2021-10-13 21:23:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:12,869 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 [2021-10-13 21:23:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:12,877 INFO L225 Difference]: With dead ends: 624 [2021-10-13 21:23:12,877 INFO L226 Difference]: Without dead ends: 624 [2021-10-13 21:23:12,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-13 21:23:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2021-10-13 21:23:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 520 states have (on average 3.978846153846154) internal successors, (2069), 623 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2069 transitions. [2021-10-13 21:23:12,912 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2069 transitions. Word has length 2 [2021-10-13 21:23:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:12,913 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2069 transitions. [2021-10-13 21:23:12,913 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) [2021-10-13 21:23:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2069 transitions. [2021-10-13 21:23:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:23:12,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:12,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:23:12,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:13,127 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 [2021-10-13 21:23:13,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash 20214, now seen corresponding path program 1 times [2021-10-13 21:23:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:13,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706018480] [2021-10-13 21:23:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:13,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:13,135 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) [2021-10-13 21:23:13,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:23:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:23:13,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:13,580 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-13 21:23:13,580 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 55 treesize of output 101 [2021-10-13 21:23:13,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 21:23:13,596 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 104 treesize of output 100 [2021-10-13 21:23:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:15,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:15,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706018480] [2021-10-13 21:23:15,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706018480] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:15,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:15,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:15,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831508749] [2021-10-13 21:23:15,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:15,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:15,411 INFO L87 Difference]: Start difference. First operand 624 states and 2069 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) [2021-10-13 21:23:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:15,690 INFO L93 Difference]: Finished difference Result 498 states and 1566 transitions. [2021-10-13 21:23:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:15,691 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 [2021-10-13 21:23:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:15,696 INFO L225 Difference]: With dead ends: 498 [2021-10-13 21:23:15,697 INFO L226 Difference]: Without dead ends: 498 [2021-10-13 21:23:15,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-13 21:23:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-10-13 21:23:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 422 states have (on average 3.7109004739336493) internal successors, (1566), 497 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1566 transitions. [2021-10-13 21:23:15,720 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1566 transitions. Word has length 2 [2021-10-13 21:23:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1566 transitions. [2021-10-13 21:23:15,721 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) [2021-10-13 21:23:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1566 transitions. [2021-10-13 21:23:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:23:15,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:15,722 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:23:15,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:15,930 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 [2021-10-13 21:23:15,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:15,931 INFO L82 PathProgramCache]: Analyzing trace with hash 19409728, now seen corresponding path program 1 times [2021-10-13 21:23:15,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:15,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498133499] [2021-10-13 21:23:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:15,932 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:15,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:15,937 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) [2021-10-13 21:23:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:23:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:16,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:23:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:16,371 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:16,372 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 [2021-10-13 21:23:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:16,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:17,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:17,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498133499] [2021-10-13 21:23:17,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498133499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:17,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:17,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:23:17,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313190787] [2021-10-13 21:23:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:17,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:17,085 INFO L87 Difference]: Start difference. First operand 498 states and 1566 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) [2021-10-13 21:23:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:19,078 INFO L93 Difference]: Finished difference Result 2967 states and 9364 transitions. [2021-10-13 21:23:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:23:19,081 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 [2021-10-13 21:23:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:19,113 INFO L225 Difference]: With dead ends: 2967 [2021-10-13 21:23:19,113 INFO L226 Difference]: Without dead ends: 2967 [2021-10-13 21:23:19,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-10-13 21:23:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 502. [2021-10-13 21:23:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 426 states have (on average 3.6948356807511735) internal successors, (1574), 501 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1574 transitions. [2021-10-13 21:23:19,171 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1574 transitions. Word has length 4 [2021-10-13 21:23:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1574 transitions. [2021-10-13 21:23:19,172 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) [2021-10-13 21:23:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1574 transitions. [2021-10-13 21:23:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:23:19,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:19,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:23:19,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:19,390 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 [2021-10-13 21:23:19,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash 19437508, now seen corresponding path program 1 times [2021-10-13 21:23:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:19,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670929741] [2021-10-13 21:23:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:19,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:19,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:19,395 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) [2021-10-13 21:23:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:23:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:23:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:19,532 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:23:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-13 21:23:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:19,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:19,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:19,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670929741] [2021-10-13 21:23:19,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670929741] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:19,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:19,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:19,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907370350] [2021-10-13 21:23:19,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:19,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:19,738 INFO L87 Difference]: Start difference. First operand 502 states and 1574 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:19,829 INFO L93 Difference]: Finished difference Result 472 states and 1489 transitions. [2021-10-13 21:23:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:23:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:19,835 INFO L225 Difference]: With dead ends: 472 [2021-10-13 21:23:19,835 INFO L226 Difference]: Without dead ends: 472 [2021-10-13 21:23:19,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-13 21:23:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2021-10-13 21:23:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 408 states have (on average 3.6495098039215685) internal successors, (1489), 471 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1489 transitions. [2021-10-13 21:23:19,853 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1489 transitions. Word has length 4 [2021-10-13 21:23:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:19,854 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1489 transitions. [2021-10-13 21:23:19,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1489 transitions. [2021-10-13 21:23:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:23:19,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:19,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:23:19,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 21:23:20,073 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 [2021-10-13 21:23:20,074 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash 19437509, now seen corresponding path program 1 times [2021-10-13 21:23:20,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:20,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254465856] [2021-10-13 21:23:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:20,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:20,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:20,078 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) [2021-10-13 21:23:20,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:23:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:23:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:20,525 INFO L354 Elim1Store]: treesize reduction 233, result has 21.3 percent of original size [2021-10-13 21:23:20,526 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 45 treesize of output 91 [2021-10-13 21:23:20,536 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 93 treesize of output 91 [2021-10-13 21:23:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:23,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:23,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:23,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254465856] [2021-10-13 21:23:23,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254465856] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:23,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:23,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:23,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725660445] [2021-10-13 21:23:23,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:23,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:23,516 INFO L87 Difference]: Start difference. First operand 472 states and 1489 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:23,767 INFO L93 Difference]: Finished difference Result 442 states and 1404 transitions. [2021-10-13 21:23:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:23:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:23,776 INFO L225 Difference]: With dead ends: 442 [2021-10-13 21:23:23,776 INFO L226 Difference]: Without dead ends: 442 [2021-10-13 21:23:23,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-13 21:23:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-10-13 21:23:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 390 states have (on average 3.6) internal successors, (1404), 441 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1404 transitions. [2021-10-13 21:23:23,795 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1404 transitions. Word has length 4 [2021-10-13 21:23:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1404 transitions. [2021-10-13 21:23:23,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1404 transitions. [2021-10-13 21:23:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:23:23,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:23,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:23:23,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:24,010 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 [2021-10-13 21:23:24,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash 602557445, now seen corresponding path program 1 times [2021-10-13 21:23:24,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:24,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532443015] [2021-10-13 21:23:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:24,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:24,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:24,018 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) [2021-10-13 21:23:24,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:23:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:23:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:24,148 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:23:24,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:23:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:24,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:24,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:24,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532443015] [2021-10-13 21:23:24,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532443015] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:24,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:24,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:23:24,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486098932] [2021-10-13 21:23:24,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:24,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:24,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:24,206 INFO L87 Difference]: Start difference. First operand 442 states and 1404 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:24,317 INFO L93 Difference]: Finished difference Result 260 states and 803 transitions. [2021-10-13 21:23:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:23:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 21:23:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:24,321 INFO L225 Difference]: With dead ends: 260 [2021-10-13 21:23:24,321 INFO L226 Difference]: Without dead ends: 260 [2021-10-13 21:23:24,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:23:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-13 21:23:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-10-13 21:23:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 239 states have (on average 3.3598326359832638) internal successors, (803), 259 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 803 transitions. [2021-10-13 21:23:24,332 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 803 transitions. Word has length 5 [2021-10-13 21:23:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:24,332 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 803 transitions. [2021-10-13 21:23:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 803 transitions. [2021-10-13 21:23:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:23:24,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:24,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:23:24,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:24,545 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 [2021-10-13 21:23:24,545 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 602557446, now seen corresponding path program 1 times [2021-10-13 21:23:24,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:24,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013003321] [2021-10-13 21:23:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:24,548 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:24,549 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) [2021-10-13 21:23:24,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:23:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 21:23:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:24,883 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:24,884 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 [2021-10-13 21:23:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:25,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:25,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:25,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013003321] [2021-10-13 21:23:25,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013003321] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:25,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:25,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:23:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893260329] [2021-10-13 21:23:25,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:25,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:25,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:25,359 INFO L87 Difference]: Start difference. First operand 260 states and 803 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) [2021-10-13 21:23:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:25,840 INFO L93 Difference]: Finished difference Result 460 states and 1475 transitions. [2021-10-13 21:23:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:23:25,841 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 [2021-10-13 21:23:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:25,845 INFO L225 Difference]: With dead ends: 460 [2021-10-13 21:23:25,845 INFO L226 Difference]: Without dead ends: 460 [2021-10-13 21:23:25,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:23:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-13 21:23:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 360. [2021-10-13 21:23:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 339 states have (on average 3.631268436578171) internal successors, (1231), 359 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1231 transitions. [2021-10-13 21:23:25,860 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1231 transitions. Word has length 5 [2021-10-13 21:23:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:25,860 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1231 transitions. [2021-10-13 21:23:25,861 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) [2021-10-13 21:23:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1231 transitions. [2021-10-13 21:23:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:23:25,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:25,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:23:25,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 21:23:26,072 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 [2021-10-13 21:23:26,073 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1499591816, now seen corresponding path program 1 times [2021-10-13 21:23:26,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:26,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156265907] [2021-10-13 21:23:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:26,075 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:26,076 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) [2021-10-13 21:23:26,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:23:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:26,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:23:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:26,216 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:23:26,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:23:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:26,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:26,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:26,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156265907] [2021-10-13 21:23:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156265907] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:26,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:23:26,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097373478] [2021-10-13 21:23:26,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:23:26,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:23:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:26,290 INFO L87 Difference]: Start difference. First operand 360 states and 1231 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:26,381 INFO L93 Difference]: Finished difference Result 332 states and 1143 transitions. [2021-10-13 21:23:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:26,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:23:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:26,386 INFO L225 Difference]: With dead ends: 332 [2021-10-13 21:23:26,386 INFO L226 Difference]: Without dead ends: 332 [2021-10-13 21:23:26,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:23:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-13 21:23:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-10-13 21:23:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 317 states have (on average 3.6056782334384856) internal successors, (1143), 331 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1143 transitions. [2021-10-13 21:23:26,400 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1143 transitions. Word has length 6 [2021-10-13 21:23:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:26,400 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1143 transitions. [2021-10-13 21:23:26,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1143 transitions. [2021-10-13 21:23:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:23:26,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:26,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:23:26,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:26,614 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 [2021-10-13 21:23:26,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1499591814, now seen corresponding path program 1 times [2021-10-13 21:23:26,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:26,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828556822] [2021-10-13 21:23:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:26,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:26,618 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) [2021-10-13 21:23:26,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:23:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:23:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:26,972 INFO L354 Elim1Store]: treesize reduction 241, result has 18.6 percent of original size [2021-10-13 21:23:26,972 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 40 treesize of output 78 [2021-10-13 21:23:26,978 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 81 treesize of output 79 [2021-10-13 21:23:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:27,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:27,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828556822] [2021-10-13 21:23:27,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828556822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:27,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:27,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:23:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818676720] [2021-10-13 21:23:27,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:23:27,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:23:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:27,662 INFO L87 Difference]: Start difference. First operand 332 states and 1143 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:27,817 INFO L93 Difference]: Finished difference Result 304 states and 1055 transitions. [2021-10-13 21:23:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:23:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:23:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:27,821 INFO L225 Difference]: With dead ends: 304 [2021-10-13 21:23:27,821 INFO L226 Difference]: Without dead ends: 304 [2021-10-13 21:23:27,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:23:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-13 21:23:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-10-13 21:23:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 295 states have (on average 3.5762711864406778) internal successors, (1055), 303 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1055 transitions. [2021-10-13 21:23:27,833 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1055 transitions. Word has length 6 [2021-10-13 21:23:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:27,833 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 1055 transitions. [2021-10-13 21:23:27,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1055 transitions. [2021-10-13 21:23:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:23:27,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:27,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:27,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:28,048 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 [2021-10-13 21:23:28,049 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -757298556, now seen corresponding path program 1 times [2021-10-13 21:23:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:28,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752514985] [2021-10-13 21:23:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:28,051 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:28,053 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) [2021-10-13 21:23:28,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:23:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:28,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:23:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:28,392 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:28,393 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 [2021-10-13 21:23:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:28,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:28,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752514985] [2021-10-13 21:23:28,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752514985] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:28,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:28,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:23:28,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44650916] [2021-10-13 21:23:28,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:28,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:28,998 INFO L87 Difference]: Start difference. First operand 304 states and 1055 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) [2021-10-13 21:23:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:29,647 INFO L93 Difference]: Finished difference Result 518 states and 1885 transitions. [2021-10-13 21:23:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:23:29,648 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 [2021-10-13 21:23:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:29,656 INFO L225 Difference]: With dead ends: 518 [2021-10-13 21:23:29,656 INFO L226 Difference]: Without dead ends: 518 [2021-10-13 21:23:29,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:23:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-13 21:23:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 440. [2021-10-13 21:23:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 431 states have (on average 3.91415313225058) internal successors, (1687), 439 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1687 transitions. [2021-10-13 21:23:29,671 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1687 transitions. Word has length 7 [2021-10-13 21:23:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:29,672 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1687 transitions. [2021-10-13 21:23:29,672 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) [2021-10-13 21:23:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1687 transitions. [2021-10-13 21:23:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:23:29,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:29,673 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-13 21:23:29,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:29,885 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 [2021-10-13 21:23:29,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -762772250, now seen corresponding path program 1 times [2021-10-13 21:23:29,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:29,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965517215] [2021-10-13 21:23:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:29,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:29,889 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) [2021-10-13 21:23:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:23:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:23:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:30,233 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:30,233 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 [2021-10-13 21:23:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:30,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:31,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965517215] [2021-10-13 21:23:31,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965517215] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:31,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:31,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:23:31,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435271548] [2021-10-13 21:23:31,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:23:31,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:23:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:23:31,128 INFO L87 Difference]: Start difference. First operand 440 states and 1687 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-13 21:23:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:33,929 INFO L93 Difference]: Finished difference Result 1424 states and 4993 transitions. [2021-10-13 21:23:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:23:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 [2021-10-13 21:23:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:33,943 INFO L225 Difference]: With dead ends: 1424 [2021-10-13 21:23:33,944 INFO L226 Difference]: Without dead ends: 1424 [2021-10-13 21:23:33,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1410.9ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:23:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-13 21:23:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 682. [2021-10-13 21:23:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 673 states have (on average 3.725111441307578) internal successors, (2507), 681 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2507 transitions. [2021-10-13 21:23:33,977 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2507 transitions. Word has length 7 [2021-10-13 21:23:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:33,978 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2507 transitions. [2021-10-13 21:23:33,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-10-13 21:23:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2507 transitions. [2021-10-13 21:23:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:23:33,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:33,981 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:23:33,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:34,193 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 [2021-10-13 21:23:34,193 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:34,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1808313152, now seen corresponding path program 2 times [2021-10-13 21:23:34,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:34,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942216637] [2021-10-13 21:23:34,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:23:34,196 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:34,197 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) [2021-10-13 21:23:34,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:23:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:23:34,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:23:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:23:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:34,585 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:34,585 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 [2021-10-13 21:23:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:34,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:36,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:36,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942216637] [2021-10-13 21:23:36,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942216637] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:36,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:36,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:23:36,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859425232] [2021-10-13 21:23:36,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:23:36,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:23:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:23:36,830 INFO L87 Difference]: Start difference. First operand 682 states and 2507 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) [2021-10-13 21:23:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:44,636 INFO L93 Difference]: Finished difference Result 5813 states and 22358 transitions. [2021-10-13 21:23:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:23:44,638 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 [2021-10-13 21:23:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:44,682 INFO L225 Difference]: With dead ends: 5813 [2021-10-13 21:23:44,682 INFO L226 Difference]: Without dead ends: 5813 [2021-10-13 21:23:44,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5543.2ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:23:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-10-13 21:23:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 690. [2021-10-13 21:23:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 681 states have (on average 3.7048458149779737) internal successors, (2523), 689 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2523 transitions. [2021-10-13 21:23:44,769 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2523 transitions. Word has length 8 [2021-10-13 21:23:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2523 transitions. [2021-10-13 21:23:44,770 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) [2021-10-13 21:23:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2523 transitions. [2021-10-13 21:23:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:23:44,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:44,771 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-13 21:23:44,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:44,986 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 [2021-10-13 21:23:44,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 596451366, now seen corresponding path program 1 times [2021-10-13 21:23:44,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:44,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017294688] [2021-10-13 21:23:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:44,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:44,990 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) [2021-10-13 21:23:44,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:23:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:23:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:45,388 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:45,388 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 [2021-10-13 21:23:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:23:45,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:23:46,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:46,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017294688] [2021-10-13 21:23:46,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017294688] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:46,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:46,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:23:46,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089552975] [2021-10-13 21:23:46,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:23:46,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:23:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:23:46,386 INFO L87 Difference]: Start difference. First operand 690 states and 2523 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-13 21:23:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:48,958 INFO L93 Difference]: Finished difference Result 1662 states and 5983 transitions. [2021-10-13 21:23:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 21:23:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 9 [2021-10-13 21:23:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:48,967 INFO L225 Difference]: With dead ends: 1662 [2021-10-13 21:23:48,968 INFO L226 Difference]: Without dead ends: 1662 [2021-10-13 21:23:48,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2036.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:23:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-10-13 21:23:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 813. [2021-10-13 21:23:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 804 states have (on average 3.9353233830845773) internal successors, (3164), 812 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 3164 transitions. [2021-10-13 21:23:49,005 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 3164 transitions. Word has length 9 [2021-10-13 21:23:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:49,005 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 3164 transitions. [2021-10-13 21:23:49,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-10-13 21:23:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 3164 transitions. [2021-10-13 21:23:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:23:49,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:49,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:49,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:49,219 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 [2021-10-13 21:23:49,219 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1909627769, now seen corresponding path program 1 times [2021-10-13 21:23:49,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:49,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104806027] [2021-10-13 21:23:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:49,222 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:49,223 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) [2021-10-13 21:23:49,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:23:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:23:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:49,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:49,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:49,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104806027] [2021-10-13 21:23:49,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104806027] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:23:49,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:23:49,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:23:49,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167382183] [2021-10-13 21:23:49,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:23:49,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:23:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:23:49,578 INFO L87 Difference]: Start difference. First operand 813 states and 3164 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-13 21:23:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:49,843 INFO L93 Difference]: Finished difference Result 801 states and 3105 transitions. [2021-10-13 21:23:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:23:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 [2021-10-13 21:23:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:49,847 INFO L225 Difference]: With dead ends: 801 [2021-10-13 21:23:49,847 INFO L226 Difference]: Without dead ends: 801 [2021-10-13 21:23:49,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-10-13 21:23:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 793. [2021-10-13 21:23:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 784 states have (on average 3.951530612244898) internal successors, (3098), 792 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 3098 transitions. [2021-10-13 21:23:49,870 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 3098 transitions. Word has length 9 [2021-10-13 21:23:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:49,871 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 3098 transitions. [2021-10-13 21:23:49,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-10-13 21:23:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 3098 transitions. [2021-10-13 21:23:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:23:49,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:49,872 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:49,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:50,084 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 [2021-10-13 21:23:50,085 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -18257570, now seen corresponding path program 1 times [2021-10-13 21:23:50,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:50,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394290964] [2021-10-13 21:23:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:50,087 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:50,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:50,089 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) [2021-10-13 21:23:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:23:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:23:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:50,565 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 21:23:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:50,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:51,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:51,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394290964] [2021-10-13 21:23:51,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394290964] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:51,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:23:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288091406] [2021-10-13 21:23:51,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 21:23:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 21:23:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:23:51,711 INFO L87 Difference]: Start difference. First operand 793 states and 3098 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:23:53,332 INFO L93 Difference]: Finished difference Result 1592 states and 6012 transitions. [2021-10-13 21:23:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 21:23:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:23:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:23:53,342 INFO L225 Difference]: With dead ends: 1592 [2021-10-13 21:23:53,342 INFO L226 Difference]: Without dead ends: 1592 [2021-10-13 21:23:53,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1150.7ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:23:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-10-13 21:23:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1134. [2021-10-13 21:23:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1125 states have (on average 4.021333333333334) internal successors, (4524), 1133 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 4524 transitions. [2021-10-13 21:23:53,402 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 4524 transitions. Word has length 10 [2021-10-13 21:23:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:23:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 4524 transitions. [2021-10-13 21:23:53,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:23:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 4524 transitions. [2021-10-13 21:23:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:23:53,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:23:53,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:23:53,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:53,623 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 [2021-10-13 21:23:53,624 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:23:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:23:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -13584671, now seen corresponding path program 1 times [2021-10-13 21:23:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:23:53,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466211238] [2021-10-13 21:23:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:23:53,626 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:23:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:23:53,627 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) [2021-10-13 21:23:53,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:23:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:23:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:23:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:23:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:23:54,035 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:23:54,036 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 [2021-10-13 21:23:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:23:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:23:55,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:23:55,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466211238] [2021-10-13 21:23:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466211238] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:23:55,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:23:55,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:23:55,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872737592] [2021-10-13 21:23:55,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:23:55,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:23:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:23:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:23:55,357 INFO L87 Difference]: Start difference. First operand 1134 states and 4524 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) [2021-10-13 21:24:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:00,067 INFO L93 Difference]: Finished difference Result 1987 states and 8057 transitions. [2021-10-13 21:24:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 21:24:00,074 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 [2021-10-13 21:24:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:00,084 INFO L225 Difference]: With dead ends: 1987 [2021-10-13 21:24:00,085 INFO L226 Difference]: Without dead ends: 1987 [2021-10-13 21:24:00,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3101.4ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:24:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-10-13 21:24:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1545. [2021-10-13 21:24:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1536 states have (on average 4.078776041666667) internal successors, (6265), 1544 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 6265 transitions. [2021-10-13 21:24:00,146 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 6265 transitions. Word has length 10 [2021-10-13 21:24:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 6265 transitions. [2021-10-13 21:24:00,147 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) [2021-10-13 21:24:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 6265 transitions. [2021-10-13 21:24:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 21:24:00,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:00,148 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:00,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:00,361 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 [2021-10-13 21:24:00,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1370463676, now seen corresponding path program 2 times [2021-10-13 21:24:00,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:00,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313754173] [2021-10-13 21:24:00,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:00,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:00,364 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) [2021-10-13 21:24:00,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:24:00,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:24:00,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 21:24:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:00,924 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:00,924 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 [2021-10-13 21:24:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:01,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:02,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:02,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313754173] [2021-10-13 21:24:02,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313754173] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:02,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:02,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:24:02,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917816790] [2021-10-13 21:24:02,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:24:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:24:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:24:02,599 INFO L87 Difference]: Start difference. First operand 1545 states and 6265 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:13,210 INFO L93 Difference]: Finished difference Result 3867 states and 15121 transitions. [2021-10-13 21:24:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 21:24:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 21:24:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:13,229 INFO L225 Difference]: With dead ends: 3867 [2021-10-13 21:24:13,229 INFO L226 Difference]: Without dead ends: 3867 [2021-10-13 21:24:13,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5642.7ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:24:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-10-13 21:24:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2343. [2021-10-13 21:24:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2334 states have (on average 4.24293059125964) internal successors, (9903), 2342 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9903 transitions. [2021-10-13 21:24:13,337 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9903 transitions. Word has length 11 [2021-10-13 21:24:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:13,337 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 9903 transitions. [2021-10-13 21:24:13,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9903 transitions. [2021-10-13 21:24:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:24:13,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:13,340 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:13,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:13,554 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 [2021-10-13 21:24:13,555 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash 610161428, now seen corresponding path program 1 times [2021-10-13 21:24:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:13,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370084074] [2021-10-13 21:24:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:24:13,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:13,560 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) [2021-10-13 21:24:13,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 21:24:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:24:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 21:24:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:14,035 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:14,035 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 [2021-10-13 21:24:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:14,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:16,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:16,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370084074] [2021-10-13 21:24:16,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370084074] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:16,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:16,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:24:16,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690754914] [2021-10-13 21:24:16,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:24:16,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:16,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:24:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:24:16,332 INFO L87 Difference]: Start difference. First operand 2343 states and 9903 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) [2021-10-13 21:24:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:26,345 INFO L93 Difference]: Finished difference Result 3653 states and 15697 transitions. [2021-10-13 21:24:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:24:26,348 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 [2021-10-13 21:24:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:26,362 INFO L225 Difference]: With dead ends: 3653 [2021-10-13 21:24:26,362 INFO L226 Difference]: Without dead ends: 3653 [2021-10-13 21:24:26,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6960.2ms TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:24:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2021-10-13 21:24:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 2563. [2021-10-13 21:24:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2554 states have (on average 4.364526233359436) internal successors, (11147), 2562 states have internal predecessors, (11147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 11147 transitions. [2021-10-13 21:24:26,488 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 11147 transitions. Word has length 12 [2021-10-13 21:24:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:26,488 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 11147 transitions. [2021-10-13 21:24:26,488 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) [2021-10-13 21:24:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 11147 transitions. [2021-10-13 21:24:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:24:26,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:26,491 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:26,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:26,706 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 [2021-10-13 21:24:26,707 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash -290688384, now seen corresponding path program 2 times [2021-10-13 21:24:26,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:26,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816828515] [2021-10-13 21:24:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:26,709 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:26,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:26,710 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) [2021-10-13 21:24:26,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 21:24:26,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:24:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:24:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:27,208 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:27,209 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 [2021-10-13 21:24:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:24:27,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:29,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:29,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816828515] [2021-10-13 21:24:29,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816828515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:29,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:29,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-13 21:24:29,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750093663] [2021-10-13 21:24:29,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:24:29,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:24:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:24:29,615 INFO L87 Difference]: Start difference. First operand 2563 states and 11147 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:42,454 INFO L93 Difference]: Finished difference Result 5435 states and 21343 transitions. [2021-10-13 21:24:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:24:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:24:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:42,504 INFO L225 Difference]: With dead ends: 5435 [2021-10-13 21:24:42,504 INFO L226 Difference]: Without dead ends: 5435 [2021-10-13 21:24:42,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5549.3ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:24:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-10-13 21:24:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 2767. [2021-10-13 21:24:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2758 states have (on average 4.382886149383611) internal successors, (12088), 2766 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 12088 transitions. [2021-10-13 21:24:42,624 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 12088 transitions. Word has length 12 [2021-10-13 21:24:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:42,627 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 12088 transitions. [2021-10-13 21:24:42,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 12088 transitions. [2021-10-13 21:24:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:24:42,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:42,629 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:42,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:42,842 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 [2021-10-13 21:24:42,843 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1570515719, now seen corresponding path program 2 times [2021-10-13 21:24:42,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:42,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373590525] [2021-10-13 21:24:42,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:24:42,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:42,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:42,847 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) [2021-10-13 21:24:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 21:24:43,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:24:43,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:24:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:43,332 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:43,332 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 [2021-10-13 21:24:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:24:43,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:24:44,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373590525] [2021-10-13 21:24:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373590525] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:24:44,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:24:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:24:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833057079] [2021-10-13 21:24:44,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:24:44,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:24:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:24:44,715 INFO L87 Difference]: Start difference. First operand 2767 states and 12088 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) [2021-10-13 21:24:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:45,130 INFO L93 Difference]: Finished difference Result 2561 states and 11034 transitions. [2021-10-13 21:24:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:24:45,131 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 [2021-10-13 21:24:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:45,138 INFO L225 Difference]: With dead ends: 2561 [2021-10-13 21:24:45,138 INFO L226 Difference]: Without dead ends: 2561 [2021-10-13 21:24:45,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:24:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-10-13 21:24:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1479. [2021-10-13 21:24:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1474 states have (on average 4.0379918588873815) internal successors, (5952), 1478 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 5952 transitions. [2021-10-13 21:24:45,193 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 5952 transitions. Word has length 13 [2021-10-13 21:24:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:45,194 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 5952 transitions. [2021-10-13 21:24:45,194 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) [2021-10-13 21:24:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 5952 transitions. [2021-10-13 21:24:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:24:45,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:45,196 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:24:45,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-13 21:24:45,408 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 [2021-10-13 21:24:45,408 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1924641138, now seen corresponding path program 3 times [2021-10-13 21:24:45,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:45,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774931102] [2021-10-13 21:24:45,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:24:45,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:45,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:45,412 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) [2021-10-13 21:24:45,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 21:24:45,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 21:24:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:24:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:45,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:46,024 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:46,024 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 [2021-10-13 21:24:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:24:46,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:24:47,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774931102] [2021-10-13 21:24:47,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774931102] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:47,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:47,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 21:24:47,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374173008] [2021-10-13 21:24:47,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:24:47,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:24:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:24:47,324 INFO L87 Difference]: Start difference. First operand 1479 states and 5952 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) 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) [2021-10-13 21:24:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:51,974 INFO L93 Difference]: Finished difference Result 3075 states and 12053 transitions. [2021-10-13 21:24:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:24:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) 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 13 [2021-10-13 21:24:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:51,989 INFO L225 Difference]: With dead ends: 3075 [2021-10-13 21:24:51,989 INFO L226 Difference]: Without dead ends: 3075 [2021-10-13 21:24:51,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3933.6ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-10-13 21:24:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-10-13 21:24:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 1882. [2021-10-13 21:24:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1877 states have (on average 4.295684603090037) internal successors, (8063), 1881 states have internal predecessors, (8063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 8063 transitions. [2021-10-13 21:24:52,060 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 8063 transitions. Word has length 13 [2021-10-13 21:24:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:52,060 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 8063 transitions. [2021-10-13 21:24:52,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) 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) [2021-10-13 21:24:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 8063 transitions. [2021-10-13 21:24:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:24:52,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:52,063 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1] [2021-10-13 21:24:52,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:52,277 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 [2021-10-13 21:24:52,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1495236627, now seen corresponding path program 3 times [2021-10-13 21:24:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:52,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512140508] [2021-10-13 21:24:52,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:24:52,279 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:52,280 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) [2021-10-13 21:24:52,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 21:24:52,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 21:24:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:52,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:24:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:52,954 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:52,954 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 [2021-10-13 21:24:53,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:24:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:24:53,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:24:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:24:53,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:24:53,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512140508] [2021-10-13 21:24:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512140508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:24:53,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:24:53,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 21:24:53,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970422007] [2021-10-13 21:24:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:24:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:24:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:24:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:24:53,653 INFO L87 Difference]: Start difference. First operand 1882 states and 8063 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-13 21:24:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:24:55,586 INFO L93 Difference]: Finished difference Result 1798 states and 7283 transitions. [2021-10-13 21:24:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:24:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 14 [2021-10-13 21:24:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:24:55,610 INFO L225 Difference]: With dead ends: 1798 [2021-10-13 21:24:55,610 INFO L226 Difference]: Without dead ends: 1798 [2021-10-13 21:24:55,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 876.0ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:24:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-13 21:24:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1686. [2021-10-13 21:24:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1681 states have (on average 4.174895895300416) internal successors, (7018), 1685 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:24:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 7018 transitions. [2021-10-13 21:24:55,656 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 7018 transitions. Word has length 14 [2021-10-13 21:24:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:24:55,656 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 7018 transitions. [2021-10-13 21:24:55,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2021-10-13 21:24:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 7018 transitions. [2021-10-13 21:24:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:24:55,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:24:55,659 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2021-10-13 21:24:55,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 21:24:55,871 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 [2021-10-13 21:24:55,871 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:24:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:24:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1611363622, now seen corresponding path program 4 times [2021-10-13 21:24:55,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:24:55,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676213752] [2021-10-13 21:24:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:24:55,877 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:24:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:24:55,888 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) [2021-10-13 21:24:55,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 21:24:56,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:24:56,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:24:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:24:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:24:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:24:56,453 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:24:56,454 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 [2021-10-13 21:24:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:24:57,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:01,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:01,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676213752] [2021-10-13 21:25:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676213752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:01,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:01,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-13 21:25:01,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873017823] [2021-10-13 21:25:01,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 21:25:01,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 21:25:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:25:01,234 INFO L87 Difference]: Start difference. First operand 1686 states and 7018 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-13 21:25:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:25:26,078 INFO L93 Difference]: Finished difference Result 7642 states and 29356 transitions. [2021-10-13 21:25:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 21:25:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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 [2021-10-13 21:25:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:25:26,105 INFO L225 Difference]: With dead ends: 7642 [2021-10-13 21:25:26,105 INFO L226 Difference]: Without dead ends: 7642 [2021-10-13 21:25:26,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 15398.1ms TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 21:25:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2021-10-13 21:25:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 2259. [2021-10-13 21:25:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2254 states have (on average 4.311002661934339) internal successors, (9717), 2258 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:25:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 9717 transitions. [2021-10-13 21:25:26,236 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 9717 transitions. Word has length 15 [2021-10-13 21:25:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:25:26,237 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 9717 transitions. [2021-10-13 21:25:26,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 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) [2021-10-13 21:25:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 9717 transitions. [2021-10-13 21:25:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:25:26,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:25:26,242 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:25:26,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 21:25:26,453 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 [2021-10-13 21:25:26,453 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:25:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:25:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2091083712, now seen corresponding path program 3 times [2021-10-13 21:25:26,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:25:26,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109674073] [2021-10-13 21:25:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:25:26,455 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:25:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:25:26,457 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) [2021-10-13 21:25:26,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 21:25:26,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:25:26,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:25:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 21:25:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:25:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:25:27,259 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:25:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 21:25:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:28,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:25:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:25:34,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:25:34,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109674073] [2021-10-13 21:25:34,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109674073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:25:34,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:25:34,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:25:34,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490518413] [2021-10-13 21:25:34,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:25:34,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:25:34,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:25:34,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:25:34,877 INFO L87 Difference]: Start difference. First operand 2259 states and 9717 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) [2021-10-13 21:25:48,321 WARN L207 SmtUtils]: Spent 10.18 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:25:59,079 WARN L207 SmtUtils]: Spent 9.76 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:26:07,735 WARN L207 SmtUtils]: Spent 7.76 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 21:26:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:26:44,863 INFO L93 Difference]: Finished difference Result 28713 states and 128444 transitions. [2021-10-13 21:26:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:26:44,866 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 [2021-10-13 21:26:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:26:45,175 INFO L225 Difference]: With dead ends: 28713 [2021-10-13 21:26:45,175 INFO L226 Difference]: Without dead ends: 28713 [2021-10-13 21:26:45,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 62750.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:26:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28713 states. [2021-10-13 21:26:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28713 to 2275. [2021-10-13 21:26:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2270 states have (on average 4.294713656387665) internal successors, (9749), 2274 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:26:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 9749 transitions. [2021-10-13 21:26:45,915 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 9749 transitions. Word has length 16 [2021-10-13 21:26:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:26:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 9749 transitions. [2021-10-13 21:26:45,918 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) [2021-10-13 21:26:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 9749 transitions. [2021-10-13 21:26:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 21:26:45,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:26:45,924 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-13 21:26:45,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 21:26:46,137 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 [2021-10-13 21:26:46,138 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:26:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:26:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1243590554, now seen corresponding path program 5 times [2021-10-13 21:26:46,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:26:46,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270147982] [2021-10-13 21:26:46,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:26:46,141 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:26:46,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:26:46,141 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) [2021-10-13 21:26:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 21:26:46,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 21:26:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:26:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 21:26:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:26:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:26:46,860 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:26:46,860 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 [2021-10-13 21:26:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:26:48,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:26:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:26:53,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:26:53,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270147982] [2021-10-13 21:26:53,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270147982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:26:53,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:26:53,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:26:53,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285654692] [2021-10-13 21:26:53,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:26:53,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:26:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:26:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:26:53,405 INFO L87 Difference]: Start difference. First operand 2275 states and 9749 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:28:27,803 INFO L93 Difference]: Finished difference Result 7830 states and 30419 transitions. [2021-10-13 21:28:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-13 21:28:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 21:28:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:28:27,828 INFO L225 Difference]: With dead ends: 7830 [2021-10-13 21:28:27,829 INFO L226 Difference]: Without dead ends: 7830 [2021-10-13 21:28:27,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 49572.4ms TimeCoverageRelationStatistics Valid=1242, Invalid=8263, Unknown=1, NotChecked=0, Total=9506 [2021-10-13 21:28:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2021-10-13 21:28:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 2961. [2021-10-13 21:28:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2956 states have (on average 4.259472259810555) internal successors, (12591), 2960 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12591 transitions. [2021-10-13 21:28:28,002 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12591 transitions. Word has length 17 [2021-10-13 21:28:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:28:28,003 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 12591 transitions. [2021-10-13 21:28:28,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:28:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12591 transitions. [2021-10-13 21:28:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 21:28:28,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:28:28,007 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1] [2021-10-13 21:28:28,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 21:28:28,221 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 [2021-10-13 21:28:28,221 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:28:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:28:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1015640339, now seen corresponding path program 6 times [2021-10-13 21:28:28,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:28:28,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932289677] [2021-10-13 21:28:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:28:28,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:28:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:28:28,226 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) [2021-10-13 21:28:28,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 21:28:28,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 21:28:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:28:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 21:28:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:28:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:28:29,072 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:28:29,073 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 [2021-10-13 21:28:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:28:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:28:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:28:34,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:28:34,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932289677] [2021-10-13 21:28:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932289677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:28:34,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:28:34,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:28:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760112936] [2021-10-13 21:28:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 21:28:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:28:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 21:28:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:28:34,833 INFO L87 Difference]: Start difference. First operand 2961 states and 12591 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:29:08,095 INFO L93 Difference]: Finished difference Result 10245 states and 40349 transitions. [2021-10-13 21:29:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 21:29:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 21:29:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:29:08,127 INFO L225 Difference]: With dead ends: 10245 [2021-10-13 21:29:08,128 INFO L226 Difference]: Without dead ends: 10245 [2021-10-13 21:29:08,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 22678.1ms TimeCoverageRelationStatistics Valid=946, Invalid=4754, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 21:29:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2021-10-13 21:29:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 3059. [2021-10-13 21:29:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3054 states have (on average 4.2832351015062216) internal successors, (13081), 3058 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 13081 transitions. [2021-10-13 21:29:08,349 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 13081 transitions. Word has length 17 [2021-10-13 21:29:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:29:08,350 INFO L470 AbstractCegarLoop]: Abstraction has 3059 states and 13081 transitions. [2021-10-13 21:29:08,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 13081 transitions. [2021-10-13 21:29:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 21:29:08,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:29:08,356 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:29:08,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 21:29:08,572 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 [2021-10-13 21:29:08,573 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:29:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:29:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2106511330, now seen corresponding path program 4 times [2021-10-13 21:29:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:29:08,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145771366] [2021-10-13 21:29:08,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:29:08,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:29:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:29:08,576 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) [2021-10-13 21:29:08,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 21:29:08,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:29:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:29:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:29:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:29:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:29:09,186 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:29:09,186 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 [2021-10-13 21:29:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:29:10,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:29:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:29:13,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:29:13,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145771366] [2021-10-13 21:29:13,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145771366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:29:13,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:29:13,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-13 21:29:13,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895094150] [2021-10-13 21:29:13,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 21:29:13,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:29:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 21:29:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:29:13,614 INFO L87 Difference]: Start difference. First operand 3059 states and 13081 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:29:34,223 INFO L93 Difference]: Finished difference Result 8271 states and 31475 transitions. [2021-10-13 21:29:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 21:29:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 21:29:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:29:34,251 INFO L225 Difference]: With dead ends: 8271 [2021-10-13 21:29:34,251 INFO L226 Difference]: Without dead ends: 8271 [2021-10-13 21:29:34,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 11477.1ms TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 21:29:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2021-10-13 21:29:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 3703. [2021-10-13 21:29:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3698 states have (on average 4.282855597620335) internal successors, (15838), 3702 states have internal predecessors, (15838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 15838 transitions. [2021-10-13 21:29:34,445 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 15838 transitions. Word has length 18 [2021-10-13 21:29:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:29:34,445 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 15838 transitions. [2021-10-13 21:29:34,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:29:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 15838 transitions. [2021-10-13 21:29:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 21:29:34,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:29:34,453 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:29:34,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 21:29:34,668 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 [2021-10-13 21:29:34,668 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:29:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:29:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1365209496, now seen corresponding path program 5 times [2021-10-13 21:29:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:29:34,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385369849] [2021-10-13 21:29:34,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:29:34,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:29:34,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:29:34,672 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) [2021-10-13 21:29:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 21:29:35,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 21:29:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:29:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 21:29:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:29:35,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:29:35,529 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:29:35,529 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 [2021-10-13 21:29:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:29:36,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:29:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:29:41,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:29:41,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385369849] [2021-10-13 21:29:41,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385369849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:29:41,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:29:41,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 31 [2021-10-13 21:29:41,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261298630] [2021-10-13 21:29:41,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:29:41,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:29:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:29:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:29:41,479 INFO L87 Difference]: Start difference. First operand 3703 states and 15838 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) [2021-10-13 21:30:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:18,275 INFO L93 Difference]: Finished difference Result 8981 states and 34194 transitions. [2021-10-13 21:30:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 21:30:18,278 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 20 [2021-10-13 21:30:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:18,306 INFO L225 Difference]: With dead ends: 8981 [2021-10-13 21:30:18,306 INFO L226 Difference]: Without dead ends: 8981 [2021-10-13 21:30:18,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 21160.9ms TimeCoverageRelationStatistics Valid=756, Invalid=3404, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 21:30:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2021-10-13 21:30:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 3949. [2021-10-13 21:30:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3944 states have (on average 4.3080628803245435) internal successors, (16991), 3948 states have internal predecessors, (16991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16991 transitions. [2021-10-13 21:30:18,481 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16991 transitions. Word has length 20 [2021-10-13 21:30:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:18,481 INFO L470 AbstractCegarLoop]: Abstraction has 3949 states and 16991 transitions. [2021-10-13 21:30:18,481 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) [2021-10-13 21:30:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16991 transitions. [2021-10-13 21:30:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 21:30:18,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:18,488 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] [2021-10-13 21:30:18,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-13 21:30:18,747 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 [2021-10-13 21:30:18,748 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:30:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1599134737, now seen corresponding path program 1 times [2021-10-13 21:30:18,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:18,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140671946] [2021-10-13 21:30:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:30:18,750 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:18,752 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) [2021-10-13 21:30:18,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 21:30:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:30:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:30:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:19,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:19,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:19,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140671946] [2021-10-13 21:30:19,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140671946] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:30:19,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:30:19,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:30:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917636106] [2021-10-13 21:30:19,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:30:19,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:30:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:19,375 INFO L87 Difference]: Start difference. First operand 3949 states and 16991 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2021-10-13 21:30:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:30:19,449 INFO L93 Difference]: Finished difference Result 4310 states and 18189 transitions. [2021-10-13 21:30:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:30:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 21:30:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:30:19,468 INFO L225 Difference]: With dead ends: 4310 [2021-10-13 21:30:19,469 INFO L226 Difference]: Without dead ends: 4206 [2021-10-13 21:30:19,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:30:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2021-10-13 21:30:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 4116. [2021-10-13 21:30:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.284602286548285) internal successors, (17614), 4115 states have internal predecessors, (17614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:30:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 17614 transitions. [2021-10-13 21:30:19,619 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 17614 transitions. Word has length 20 [2021-10-13 21:30:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:30:19,619 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 17614 transitions. [2021-10-13 21:30:19,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2021-10-13 21:30:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 17614 transitions. [2021-10-13 21:30:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:30:19,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:30:19,627 INFO L512 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:30:19,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 21:30:19,843 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 [2021-10-13 21:30:19,844 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:30:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:30:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash -65410338, now seen corresponding path program 6 times [2021-10-13 21:30:19,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:30:19,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892591802] [2021-10-13 21:30:19,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:30:19,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:30:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:30:19,847 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) [2021-10-13 21:30:19,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 21:30:20,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 21:30:20,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:30:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 21:30:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:30:20,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:30:20,857 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:30:20,860 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 [2021-10-13 21:30:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:22,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:30:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:30:27,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:30:27,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892591802] [2021-10-13 21:30:27,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892591802] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:30:27,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:30:27,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-13 21:30:27,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110233730] [2021-10-13 21:30:27,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 21:30:27,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:30:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 21:30:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:30:27,666 INFO L87 Difference]: Start difference. First operand 4116 states and 17614 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:02,373 INFO L93 Difference]: Finished difference Result 11575 states and 44644 transitions. [2021-10-13 21:31:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 21:31:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2021-10-13 21:31:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:02,427 INFO L225 Difference]: With dead ends: 11575 [2021-10-13 21:31:02,427 INFO L226 Difference]: Without dead ends: 11575 [2021-10-13 21:31:02,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 19559.0ms TimeCoverageRelationStatistics Valid=1249, Invalid=5393, Unknown=0, NotChecked=0, Total=6642 [2021-10-13 21:31:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11575 states. [2021-10-13 21:31:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11575 to 5451. [2021-10-13 21:31:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 5446 states have (on average 4.383951524054352) internal successors, (23875), 5450 states have internal predecessors, (23875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 23875 transitions. [2021-10-13 21:31:02,726 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 23875 transitions. Word has length 22 [2021-10-13 21:31:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:02,728 INFO L470 AbstractCegarLoop]: Abstraction has 5451 states and 23875 transitions. [2021-10-13 21:31:02,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 23875 transitions. [2021-10-13 21:31:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:02,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:02,736 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] [2021-10-13 21:31:02,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:02,949 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 [2021-10-13 21:31:02,950 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash 318616933, now seen corresponding path program 1 times [2021-10-13 21:31:02,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:02,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737782836] [2021-10-13 21:31:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:02,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:02,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:02,953 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) [2021-10-13 21:31:02,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 21:31:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:03,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:31:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:03,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:03,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:03,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737782836] [2021-10-13 21:31:03,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737782836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:03,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:03,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 21:31:03,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073422621] [2021-10-13 21:31:03,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:31:03,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:03,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:31:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:31:03,745 INFO L87 Difference]: Start difference. First operand 5451 states and 23875 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:04,002 INFO L93 Difference]: Finished difference Result 5457 states and 23791 transitions. [2021-10-13 21:31:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:31:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 22 [2021-10-13 21:31:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:04,026 INFO L225 Difference]: With dead ends: 5457 [2021-10-13 21:31:04,026 INFO L226 Difference]: Without dead ends: 5457 [2021-10-13 21:31:04,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:31:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2021-10-13 21:31:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 5239. [2021-10-13 21:31:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 5234 states have (on average 4.4134505158578525) internal successors, (23100), 5238 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 23100 transitions. [2021-10-13 21:31:04,251 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 23100 transitions. Word has length 22 [2021-10-13 21:31:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:04,251 INFO L470 AbstractCegarLoop]: Abstraction has 5239 states and 23100 transitions. [2021-10-13 21:31:04,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 23100 transitions. [2021-10-13 21:31:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:04,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:04,259 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] [2021-10-13 21:31:04,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:04,472 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 [2021-10-13 21:31:04,473 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1619576036, now seen corresponding path program 1 times [2021-10-13 21:31:04,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:04,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333236915] [2021-10-13 21:31:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:31:04,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:04,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:04,477 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) [2021-10-13 21:31:04,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 21:31:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:31:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:05,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:05,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:05,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333236915] [2021-10-13 21:31:05,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333236915] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:05,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-13 21:31:05,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323460579] [2021-10-13 21:31:05,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:31:05,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:31:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:05,555 INFO L87 Difference]: Start difference. First operand 5239 states and 23100 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:07,439 INFO L93 Difference]: Finished difference Result 6143 states and 26130 transitions. [2021-10-13 21:31:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:31:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 22 [2021-10-13 21:31:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:07,487 INFO L225 Difference]: With dead ends: 6143 [2021-10-13 21:31:07,487 INFO L226 Difference]: Without dead ends: 6143 [2021-10-13 21:31:07,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1330.6ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:31:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-10-13 21:31:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 5427. [2021-10-13 21:31:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5427 states, 5422 states have (on average 4.356326078937661) internal successors, (23620), 5426 states have internal predecessors, (23620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5427 states to 5427 states and 23620 transitions. [2021-10-13 21:31:07,646 INFO L78 Accepts]: Start accepts. Automaton has 5427 states and 23620 transitions. Word has length 22 [2021-10-13 21:31:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:07,646 INFO L470 AbstractCegarLoop]: Abstraction has 5427 states and 23620 transitions. [2021-10-13 21:31:07,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5427 states and 23620 transitions. [2021-10-13 21:31:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:07,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:07,654 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] [2021-10-13 21:31:07,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:07,871 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 [2021-10-13 21:31:07,872 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1768877992, now seen corresponding path program 2 times [2021-10-13 21:31:07,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:07,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251574280] [2021-10-13 21:31:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:07,874 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:07,875 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) [2021-10-13 21:31:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 21:31:08,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:08,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:09,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:09,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251574280] [2021-10-13 21:31:09,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251574280] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:09,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:09,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-10-13 21:31:09,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732521211] [2021-10-13 21:31:09,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:09,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:09,217 INFO L87 Difference]: Start difference. First operand 5427 states and 23620 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-10-13 21:31:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:10,855 INFO L93 Difference]: Finished difference Result 6243 states and 26385 transitions. [2021-10-13 21:31:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:31:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 22 [2021-10-13 21:31:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:10,875 INFO L225 Difference]: With dead ends: 6243 [2021-10-13 21:31:10,876 INFO L226 Difference]: Without dead ends: 6237 [2021-10-13 21:31:10,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1034.0ms TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2021-10-13 21:31:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-10-13 21:31:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 5705. [2021-10-13 21:31:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5700 states have (on average 4.317368421052632) internal successors, (24609), 5704 states have internal predecessors, (24609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 24609 transitions. [2021-10-13 21:31:11,061 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 24609 transitions. Word has length 22 [2021-10-13 21:31:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 5705 states and 24609 transitions. [2021-10-13 21:31:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-10-13 21:31:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 24609 transitions. [2021-10-13 21:31:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:11,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:11,067 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] [2021-10-13 21:31:11,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:11,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:11,273 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash 747504342, now seen corresponding path program 3 times [2021-10-13 21:31:11,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:11,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663755230] [2021-10-13 21:31:11,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:11,275 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:11,276 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:11,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 21:31:11,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:11,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:11,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:12,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:12,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:12,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663755230] [2021-10-13 21:31:12,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663755230] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:12,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:12,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:31:12,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664162138] [2021-10-13 21:31:12,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:31:12,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:31:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:12,654 INFO L87 Difference]: Start difference. First operand 5705 states and 24609 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:14,537 INFO L93 Difference]: Finished difference Result 6379 states and 26748 transitions. [2021-10-13 21:31:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 21:31:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:31:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:14,566 INFO L225 Difference]: With dead ends: 6379 [2021-10-13 21:31:14,567 INFO L226 Difference]: Without dead ends: 6375 [2021-10-13 21:31:14,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:31:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-10-13 21:31:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 5755. [2021-10-13 21:31:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 5750 states have (on average 4.314086956521739) internal successors, (24806), 5754 states have internal predecessors, (24806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 24806 transitions. [2021-10-13 21:31:14,777 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 24806 transitions. Word has length 22 [2021-10-13 21:31:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 24806 transitions. [2021-10-13 21:31:14,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 24806 transitions. [2021-10-13 21:31:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:14,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:14,785 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] [2021-10-13 21:31:14,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-13 21:31:14,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:14,986 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1686780492, now seen corresponding path program 4 times [2021-10-13 21:31:14,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:14,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426371086] [2021-10-13 21:31:14,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:31:14,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:14,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:14,990 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-13 21:31:15,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:31:15,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:31:15,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:15,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:16,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426371086] [2021-10-13 21:31:16,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426371086] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:16,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:16,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-13 21:31:16,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132529873] [2021-10-13 21:31:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:31:16,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:31:16,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:31:16,070 INFO L87 Difference]: Start difference. First operand 5755 states and 24806 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:31:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:16,496 INFO L93 Difference]: Finished difference Result 6239 states and 26449 transitions. [2021-10-13 21:31:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:31:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-13 21:31:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:16,514 INFO L225 Difference]: With dead ends: 6239 [2021-10-13 21:31:16,514 INFO L226 Difference]: Without dead ends: 6219 [2021-10-13 21:31:16,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-10-13 21:31:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5765. [2021-10-13 21:31:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 5760 states have (on average 4.3109375) internal successors, (24831), 5764 states have internal predecessors, (24831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 24831 transitions. [2021-10-13 21:31:16,694 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 24831 transitions. Word has length 22 [2021-10-13 21:31:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 5765 states and 24831 transitions. [2021-10-13 21:31:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:31:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 24831 transitions. [2021-10-13 21:31:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:16,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:16,701 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] [2021-10-13 21:31:16,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-10-13 21:31:16,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:16,902 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2125472522, now seen corresponding path program 5 times [2021-10-13 21:31:16,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:16,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329553521] [2021-10-13 21:31:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:31:16,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:16,906 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:16,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-13 21:31:17,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:31:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:17,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:18,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:18,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329553521] [2021-10-13 21:31:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329553521] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:18,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:18,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 21:31:18,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435908459] [2021-10-13 21:31:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 21:31:18,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 21:31:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:31:18,067 INFO L87 Difference]: Start difference. First operand 5765 states and 24831 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-13 21:31:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:20,070 INFO L93 Difference]: Finished difference Result 6151 states and 26218 transitions. [2021-10-13 21:31:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:31:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 22 [2021-10-13 21:31:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:20,090 INFO L225 Difference]: With dead ends: 6151 [2021-10-13 21:31:20,091 INFO L226 Difference]: Without dead ends: 6151 [2021-10-13 21:31:20,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1153.3ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:31:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-10-13 21:31:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5583. [2021-10-13 21:31:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5578 states have (on average 4.355862316242381) internal successors, (24297), 5582 states have internal predecessors, (24297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 24297 transitions. [2021-10-13 21:31:20,289 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 24297 transitions. Word has length 22 [2021-10-13 21:31:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:20,289 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 24297 transitions. [2021-10-13 21:31:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-13 21:31:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 24297 transitions. [2021-10-13 21:31:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:20,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:20,296 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] [2021-10-13 21:31:20,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:20,497 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1679105460, now seen corresponding path program 6 times [2021-10-13 21:31:20,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:20,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848865855] [2021-10-13 21:31:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:31:20,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:20,501 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:20,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 21:31:21,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:31:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:21,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:22,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:22,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848865855] [2021-10-13 21:31:22,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848865855] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:22,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:22,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-13 21:31:22,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552746912] [2021-10-13 21:31:22,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 21:31:22,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 21:31:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:31:22,043 INFO L87 Difference]: Start difference. First operand 5583 states and 24297 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-10-13 21:31:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:23,780 INFO L93 Difference]: Finished difference Result 7449 states and 31181 transitions. [2021-10-13 21:31:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 21:31:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 22 [2021-10-13 21:31:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:23,808 INFO L225 Difference]: With dead ends: 7449 [2021-10-13 21:31:23,808 INFO L226 Difference]: Without dead ends: 7449 [2021-10-13 21:31:23,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1064.3ms TimeCoverageRelationStatistics Valid=351, Invalid=705, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 21:31:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-10-13 21:31:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 5955. [2021-10-13 21:31:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5955 states, 5950 states have (on average 4.3504201680672265) internal successors, (25885), 5954 states have internal predecessors, (25885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5955 states to 5955 states and 25885 transitions. [2021-10-13 21:31:24,028 INFO L78 Accepts]: Start accepts. Automaton has 5955 states and 25885 transitions. Word has length 22 [2021-10-13 21:31:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:24,028 INFO L470 AbstractCegarLoop]: Abstraction has 5955 states and 25885 transitions. [2021-10-13 21:31:24,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-10-13 21:31:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5955 states and 25885 transitions. [2021-10-13 21:31:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:24,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:24,034 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] [2021-10-13 21:31:24,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:24,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:24,235 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash -731628676, now seen corresponding path program 7 times [2021-10-13 21:31:24,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:24,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965001254] [2021-10-13 21:31:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:31:24,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:24,240 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-13 21:31:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:31:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:25,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:25,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:25,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965001254] [2021-10-13 21:31:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965001254] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:25,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:25,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-13 21:31:25,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022128418] [2021-10-13 21:31:25,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:31:25,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:31:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:25,473 INFO L87 Difference]: Start difference. First operand 5955 states and 25885 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:27,530 INFO L93 Difference]: Finished difference Result 9621 states and 39526 transitions. [2021-10-13 21:31:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:31:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 22 [2021-10-13 21:31:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:27,561 INFO L225 Difference]: With dead ends: 9621 [2021-10-13 21:31:27,561 INFO L226 Difference]: Without dead ends: 9621 [2021-10-13 21:31:27,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1248.6ms TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 21:31:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9621 states. [2021-10-13 21:31:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9621 to 6505. [2021-10-13 21:31:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6500 states have (on average 4.398615384615384) internal successors, (28591), 6504 states have internal predecessors, (28591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 28591 transitions. [2021-10-13 21:31:27,727 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 28591 transitions. Word has length 22 [2021-10-13 21:31:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:27,728 INFO L470 AbstractCegarLoop]: Abstraction has 6505 states and 28591 transitions. [2021-10-13 21:31:27,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 28591 transitions. [2021-10-13 21:31:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:27,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:27,735 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] [2021-10-13 21:31:27,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:27,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:27,936 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash -196854324, now seen corresponding path program 8 times [2021-10-13 21:31:27,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:27,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886854507] [2021-10-13 21:31:27,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:27,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:27,939 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:27,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-13 21:31:28,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:29,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:29,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886854507] [2021-10-13 21:31:29,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886854507] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:29,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:29,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:31:29,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952296458] [2021-10-13 21:31:29,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:31:29,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:31:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:29,437 INFO L87 Difference]: Start difference. First operand 6505 states and 28591 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:31,925 INFO L93 Difference]: Finished difference Result 8829 states and 37240 transitions. [2021-10-13 21:31:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:31:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:31:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:31,953 INFO L225 Difference]: With dead ends: 8829 [2021-10-13 21:31:31,953 INFO L226 Difference]: Without dead ends: 8825 [2021-10-13 21:31:31,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1641.6ms TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:31:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-10-13 21:31:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 6767. [2021-10-13 21:31:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6762 states have (on average 4.44572611653357) internal successors, (30062), 6766 states have internal predecessors, (30062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 30062 transitions. [2021-10-13 21:31:32,239 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 30062 transitions. Word has length 22 [2021-10-13 21:31:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:32,239 INFO L470 AbstractCegarLoop]: Abstraction has 6767 states and 30062 transitions. [2021-10-13 21:31:32,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 30062 transitions. [2021-10-13 21:31:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:32,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:32,248 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] [2021-10-13 21:31:32,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:32,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:32,454 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:32,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1880513220, now seen corresponding path program 9 times [2021-10-13 21:31:32,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:32,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889632992] [2021-10-13 21:31:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:32,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:32,457 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:32,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 21:31:33,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:33,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:33,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:34,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:34,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889632992] [2021-10-13 21:31:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889632992] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:34,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:34,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-10-13 21:31:34,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558934162] [2021-10-13 21:31:34,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:31:34,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:31:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:31:34,015 INFO L87 Difference]: Start difference. First operand 6767 states and 30062 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-10-13 21:31:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:36,077 INFO L93 Difference]: Finished difference Result 8133 states and 34779 transitions. [2021-10-13 21:31:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 21:31:36,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 22 [2021-10-13 21:31:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:36,108 INFO L225 Difference]: With dead ends: 8133 [2021-10-13 21:31:36,108 INFO L226 Difference]: Without dead ends: 8127 [2021-10-13 21:31:36,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1331.9ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 21:31:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2021-10-13 21:31:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 6849. [2021-10-13 21:31:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6844 states have (on average 4.432057276446523) internal successors, (30333), 6848 states have internal predecessors, (30333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 30333 transitions. [2021-10-13 21:31:36,384 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 30333 transitions. Word has length 22 [2021-10-13 21:31:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 6849 states and 30333 transitions. [2021-10-13 21:31:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-10-13 21:31:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 30333 transitions. [2021-10-13 21:31:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:36,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:36,392 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] [2021-10-13 21:31:36,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:36,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:36,593 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1393080426, now seen corresponding path program 10 times [2021-10-13 21:31:36,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:36,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620696268] [2021-10-13 21:31:36,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:31:36,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:36,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:36,599 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:36,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 21:31:37,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:31:37,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:31:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:37,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:37,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:37,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620696268] [2021-10-13 21:31:37,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620696268] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:31:37,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:31:37,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-13 21:31:37,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547019019] [2021-10-13 21:31:37,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:31:37,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:31:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:31:37,934 INFO L87 Difference]: Start difference. First operand 6849 states and 30333 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:31:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:38,411 INFO L93 Difference]: Finished difference Result 7291 states and 31900 transitions. [2021-10-13 21:31:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:31:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-13 21:31:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:38,481 INFO L225 Difference]: With dead ends: 7291 [2021-10-13 21:31:38,481 INFO L226 Difference]: Without dead ends: 7291 [2021-10-13 21:31:38,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-13 21:31:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-10-13 21:31:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 6845. [2021-10-13 21:31:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6845 states, 6840 states have (on average 4.432602339181287) internal successors, (30319), 6844 states have internal predecessors, (30319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6845 states to 6845 states and 30319 transitions. [2021-10-13 21:31:38,635 INFO L78 Accepts]: Start accepts. Automaton has 6845 states and 30319 transitions. Word has length 22 [2021-10-13 21:31:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:38,636 INFO L470 AbstractCegarLoop]: Abstraction has 6845 states and 30319 transitions. [2021-10-13 21:31:38,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:31:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6845 states and 30319 transitions. [2021-10-13 21:31:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:38,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:38,645 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] [2021-10-13 21:31:38,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:38,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:38,846 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -857479874, now seen corresponding path program 11 times [2021-10-13 21:31:38,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:38,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844068767] [2021-10-13 21:31:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:31:38,848 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:38,849 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:38,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 21:31:39,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:39,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:31:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:39,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:40,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:40,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844068767] [2021-10-13 21:31:40,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844068767] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:40,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:40,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-13 21:31:40,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454049264] [2021-10-13 21:31:40,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 21:31:40,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 21:31:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 21:31:40,257 INFO L87 Difference]: Start difference. First operand 6845 states and 30319 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-10-13 21:31:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:42,396 INFO L93 Difference]: Finished difference Result 7357 states and 32068 transitions. [2021-10-13 21:31:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:31:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 22 [2021-10-13 21:31:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:42,420 INFO L225 Difference]: With dead ends: 7357 [2021-10-13 21:31:42,421 INFO L226 Difference]: Without dead ends: 7357 [2021-10-13 21:31:42,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1441.7ms TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:31:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7357 states. [2021-10-13 21:31:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7357 to 6059. [2021-10-13 21:31:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6059 states, 6054 states have (on average 4.352989758837133) internal successors, (26353), 6058 states have internal predecessors, (26353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6059 states to 6059 states and 26353 transitions. [2021-10-13 21:31:42,562 INFO L78 Accepts]: Start accepts. Automaton has 6059 states and 26353 transitions. Word has length 22 [2021-10-13 21:31:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:42,562 INFO L470 AbstractCegarLoop]: Abstraction has 6059 states and 26353 transitions. [2021-10-13 21:31:42,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-10-13 21:31:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6059 states and 26353 transitions. [2021-10-13 21:31:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:42,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:42,569 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] [2021-10-13 21:31:42,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:42,770 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 729039076, now seen corresponding path program 12 times [2021-10-13 21:31:42,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:42,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777284108] [2021-10-13 21:31:42,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:31:42,772 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:42,773 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:42,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 21:31:43,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:31:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:43,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:44,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:44,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777284108] [2021-10-13 21:31:44,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777284108] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:44,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:44,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:44,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004568726] [2021-10-13 21:31:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:31:44,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:31:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:44,201 INFO L87 Difference]: Start difference. First operand 6059 states and 26353 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:46,528 INFO L93 Difference]: Finished difference Result 9415 states and 40549 transitions. [2021-10-13 21:31:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 21:31:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:31:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:46,559 INFO L225 Difference]: With dead ends: 9415 [2021-10-13 21:31:46,560 INFO L226 Difference]: Without dead ends: 9415 [2021-10-13 21:31:46,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1251.5ms TimeCoverageRelationStatistics Valid=492, Invalid=1230, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 21:31:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9415 states. [2021-10-13 21:31:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9415 to 6431. [2021-10-13 21:31:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6426 states have (on average 4.319172113289761) internal successors, (27755), 6430 states have internal predecessors, (27755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 27755 transitions. [2021-10-13 21:31:46,741 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 27755 transitions. Word has length 22 [2021-10-13 21:31:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:46,741 INFO L470 AbstractCegarLoop]: Abstraction has 6431 states and 27755 transitions. [2021-10-13 21:31:46,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 27755 transitions. [2021-10-13 21:31:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:46,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:46,748 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] [2021-10-13 21:31:46,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:46,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:46,949 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash -51888426, now seen corresponding path program 13 times [2021-10-13 21:31:46,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:46,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469964407] [2021-10-13 21:31:46,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:31:46,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:46,952 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:46,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-13 21:31:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:31:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:31:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:48,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:31:48,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:48,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469964407] [2021-10-13 21:31:48,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469964407] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:48,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:48,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-13 21:31:48,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561510715] [2021-10-13 21:31:48,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:31:48,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:31:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:31:48,350 INFO L87 Difference]: Start difference. First operand 6431 states and 27755 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:50,887 INFO L93 Difference]: Finished difference Result 10043 states and 42726 transitions. [2021-10-13 21:31:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:31:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 22 [2021-10-13 21:31:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:50,943 INFO L225 Difference]: With dead ends: 10043 [2021-10-13 21:31:50,943 INFO L226 Difference]: Without dead ends: 10043 [2021-10-13 21:31:50,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1281.4ms TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:31:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10043 states. [2021-10-13 21:31:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10043 to 6739. [2021-10-13 21:31:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6739 states, 6734 states have (on average 4.365161865161865) internal successors, (29395), 6738 states have internal predecessors, (29395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6739 states to 6739 states and 29395 transitions. [2021-10-13 21:31:51,248 INFO L78 Accepts]: Start accepts. Automaton has 6739 states and 29395 transitions. Word has length 22 [2021-10-13 21:31:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:51,248 INFO L470 AbstractCegarLoop]: Abstraction has 6739 states and 29395 transitions. [2021-10-13 21:31:51,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-13 21:31:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6739 states and 29395 transitions. [2021-10-13 21:31:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:51,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:51,261 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] [2021-10-13 21:31:51,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:51,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:51,472 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash 895588358, now seen corresponding path program 14 times [2021-10-13 21:31:51,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:51,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843632771] [2021-10-13 21:31:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:31:51,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:51,476 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:51,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-13 21:31:52,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:31:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:52,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:52,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:52,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:53,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843632771] [2021-10-13 21:31:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843632771] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:53,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:53,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-13 21:31:53,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301189574] [2021-10-13 21:31:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:31:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:31:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:53,164 INFO L87 Difference]: Start difference. First operand 6739 states and 29395 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:55,345 INFO L93 Difference]: Finished difference Result 10259 states and 43978 transitions. [2021-10-13 21:31:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:31:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:31:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:55,422 INFO L225 Difference]: With dead ends: 10259 [2021-10-13 21:31:55,423 INFO L226 Difference]: Without dead ends: 10259 [2021-10-13 21:31:55,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 21:31:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10259 states. [2021-10-13 21:31:55,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10259 to 6755. [2021-10-13 21:31:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6750 states have (on average 4.36962962962963) internal successors, (29495), 6754 states have internal predecessors, (29495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 29495 transitions. [2021-10-13 21:31:55,839 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 29495 transitions. Word has length 22 [2021-10-13 21:31:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:55,839 INFO L470 AbstractCegarLoop]: Abstraction has 6755 states and 29495 transitions. [2021-10-13 21:31:55,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 29495 transitions. [2021-10-13 21:31:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:55,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:55,849 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] [2021-10-13 21:31:55,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-13 21:31:56,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:31:56,065 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:31:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:31:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash 59869190, now seen corresponding path program 15 times [2021-10-13 21:31:56,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:31:56,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551687128] [2021-10-13 21:31:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:31:56,067 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:31:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:31:56,068 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:31:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-13 21:31:56,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:31:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:31:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:31:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:31:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:57,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:31:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:31:57,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:31:57,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551687128] [2021-10-13 21:31:57,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551687128] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:31:57,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:31:57,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:31:57,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024988784] [2021-10-13 21:31:57,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:31:57,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:31:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:31:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:31:57,659 INFO L87 Difference]: Start difference. First operand 6755 states and 29495 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:31:59,506 INFO L93 Difference]: Finished difference Result 13003 states and 57086 transitions. [2021-10-13 21:31:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:31:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:31:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:31:59,596 INFO L225 Difference]: With dead ends: 13003 [2021-10-13 21:31:59,597 INFO L226 Difference]: Without dead ends: 13001 [2021-10-13 21:31:59,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-10-13 21:31:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13001 states. [2021-10-13 21:31:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13001 to 6859. [2021-10-13 21:31:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6859 states, 6854 states have (on average 4.375401225561716) internal successors, (29989), 6858 states have internal predecessors, (29989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:31:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6859 states to 6859 states and 29989 transitions. [2021-10-13 21:31:59,930 INFO L78 Accepts]: Start accepts. Automaton has 6859 states and 29989 transitions. Word has length 22 [2021-10-13 21:31:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:31:59,931 INFO L470 AbstractCegarLoop]: Abstraction has 6859 states and 29989 transitions. [2021-10-13 21:31:59,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:31:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6859 states and 29989 transitions. [2021-10-13 21:31:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:31:59,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:31:59,943 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] [2021-10-13 21:31:59,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:00,157 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 798195512, now seen corresponding path program 16 times [2021-10-13 21:32:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:00,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068571265] [2021-10-13 21:32:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:32:00,159 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:00,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:00,160 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:00,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-13 21:32:00,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:32:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:32:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:01,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:01,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:01,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068571265] [2021-10-13 21:32:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068571265] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:32:01,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:32:01,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-13 21:32:01,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443966807] [2021-10-13 21:32:01,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:32:01,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:32:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:01,710 INFO L87 Difference]: Start difference. First operand 6859 states and 29989 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:32:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:02,291 INFO L93 Difference]: Finished difference Result 7213 states and 31216 transitions. [2021-10-13 21:32:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:32:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-13 21:32:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:02,330 INFO L225 Difference]: With dead ends: 7213 [2021-10-13 21:32:02,330 INFO L226 Difference]: Without dead ends: 7213 [2021-10-13 21:32:02,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:32:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-10-13 21:32:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6899. [2021-10-13 21:32:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6894 states have (on average 4.37467362924282) internal successors, (30159), 6898 states have internal predecessors, (30159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30159 transitions. [2021-10-13 21:32:02,552 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30159 transitions. Word has length 22 [2021-10-13 21:32:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:02,552 INFO L470 AbstractCegarLoop]: Abstraction has 6899 states and 30159 transitions. [2021-10-13 21:32:02,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:32:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30159 transitions. [2021-10-13 21:32:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:32:02,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:02,563 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] [2021-10-13 21:32:02,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:02,777 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1126578394, now seen corresponding path program 17 times [2021-10-13 21:32:02,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:02,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968151840] [2021-10-13 21:32:02,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:32:02,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:02,780 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:02,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-13 21:32:03,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:32:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:32:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:03,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:04,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968151840] [2021-10-13 21:32:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968151840] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:04,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:04,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 21:32:04,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445017579] [2021-10-13 21:32:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 21:32:04,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 21:32:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:04,336 INFO L87 Difference]: Start difference. First operand 6899 states and 30159 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-13 21:32:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:06,871 INFO L93 Difference]: Finished difference Result 9981 states and 43739 transitions. [2021-10-13 21:32:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 21:32:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 22 [2021-10-13 21:32:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:06,924 INFO L225 Difference]: With dead ends: 9981 [2021-10-13 21:32:06,924 INFO L226 Difference]: Without dead ends: 9977 [2021-10-13 21:32:06,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1570.7ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-10-13 21:32:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-10-13 21:32:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 6915. [2021-10-13 21:32:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 6910 states have (on average 4.374095513748191) internal successors, (30225), 6914 states have internal predecessors, (30225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 30225 transitions. [2021-10-13 21:32:07,208 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 30225 transitions. Word has length 22 [2021-10-13 21:32:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:07,208 INFO L470 AbstractCegarLoop]: Abstraction has 6915 states and 30225 transitions. [2021-10-13 21:32:07,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-13 21:32:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 30225 transitions. [2021-10-13 21:32:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:32:07,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:07,227 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] [2021-10-13 21:32:07,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-10-13 21:32:07,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:07,441 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash -799616566, now seen corresponding path program 18 times [2021-10-13 21:32:07,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:07,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569946387] [2021-10-13 21:32:07,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:32:07,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:07,444 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:07,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-13 21:32:08,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 21:32:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:32:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:08,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:09,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569946387] [2021-10-13 21:32:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569946387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:09,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:32:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412589714] [2021-10-13 21:32:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:32:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:32:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:32:09,285 INFO L87 Difference]: Start difference. First operand 6915 states and 30225 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:32:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:11,865 INFO L93 Difference]: Finished difference Result 11433 states and 48642 transitions. [2021-10-13 21:32:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 21:32:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:32:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:11,902 INFO L225 Difference]: With dead ends: 11433 [2021-10-13 21:32:11,903 INFO L226 Difference]: Without dead ends: 11431 [2021-10-13 21:32:11,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1716.4ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:32:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2021-10-13 21:32:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 6907. [2021-10-13 21:32:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6902 states have (on average 4.376267748478702) internal successors, (30205), 6906 states have internal predecessors, (30205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 30205 transitions. [2021-10-13 21:32:12,097 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 30205 transitions. Word has length 22 [2021-10-13 21:32:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:12,097 INFO L470 AbstractCegarLoop]: Abstraction has 6907 states and 30205 transitions. [2021-10-13 21:32:12,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:32:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 30205 transitions. [2021-10-13 21:32:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:32:12,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:12,104 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] [2021-10-13 21:32:12,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:12,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:12,306 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:12,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1802909892, now seen corresponding path program 19 times [2021-10-13 21:32:12,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:12,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496298200] [2021-10-13 21:32:12,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:32:12,308 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:12,309 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:12,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-13 21:32:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:32:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:32:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:13,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:32:13,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:13,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496298200] [2021-10-13 21:32:13,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496298200] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:32:13,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:32:13,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-13 21:32:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046794262] [2021-10-13 21:32:13,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:32:13,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:32:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:32:13,694 INFO L87 Difference]: Start difference. First operand 6907 states and 30205 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:32:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:14,497 INFO L93 Difference]: Finished difference Result 9721 states and 42494 transitions. [2021-10-13 21:32:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 21:32:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 22 [2021-10-13 21:32:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:14,540 INFO L225 Difference]: With dead ends: 9721 [2021-10-13 21:32:14,541 INFO L226 Difference]: Without dead ends: 9701 [2021-10-13 21:32:14,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:32:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9701 states. [2021-10-13 21:32:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9701 to 6923. [2021-10-13 21:32:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 6918 states have (on average 4.371928302977739) internal successors, (30245), 6922 states have internal predecessors, (30245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 30245 transitions. [2021-10-13 21:32:14,747 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 30245 transitions. Word has length 22 [2021-10-13 21:32:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:14,747 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 30245 transitions. [2021-10-13 21:32:14,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-10-13 21:32:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 30245 transitions. [2021-10-13 21:32:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:32:14,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:14,754 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] [2021-10-13 21:32:14,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-10-13 21:32:14,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:14,956 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1640701164, now seen corresponding path program 20 times [2021-10-13 21:32:14,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:14,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313697302] [2021-10-13 21:32:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:32:14,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:14,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:14,963 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-13 21:32:15,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:32:15,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:32:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 21:32:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:16,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:32:16,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:16,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313697302] [2021-10-13 21:32:16,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313697302] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:16,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:16,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 21:32:16,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130809271] [2021-10-13 21:32:16,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 21:32:16,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 21:32:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-10-13 21:32:16,835 INFO L87 Difference]: Start difference. First operand 6923 states and 30245 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:32:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:32:18,920 INFO L93 Difference]: Finished difference Result 10081 states and 43460 transitions. [2021-10-13 21:32:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:32:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 22 [2021-10-13 21:32:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:32:18,954 INFO L225 Difference]: With dead ends: 10081 [2021-10-13 21:32:18,955 INFO L226 Difference]: Without dead ends: 10081 [2021-10-13 21:32:18,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1493.6ms TimeCoverageRelationStatistics Valid=401, Invalid=859, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:32:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10081 states. [2021-10-13 21:32:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10081 to 6431. [2021-10-13 21:32:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6426 states have (on average 4.319172113289761) internal successors, (27755), 6430 states have internal predecessors, (27755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:32:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 27755 transitions. [2021-10-13 21:32:19,122 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 27755 transitions. Word has length 22 [2021-10-13 21:32:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:32:19,122 INFO L470 AbstractCegarLoop]: Abstraction has 6431 states and 27755 transitions. [2021-10-13 21:32:19,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-10-13 21:32:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 27755 transitions. [2021-10-13 21:32:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:32:19,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:32:19,128 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:32:19,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-13 21:32:19,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:32:19,335 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:32:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:32:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 526682500, now seen corresponding path program 7 times [2021-10-13 21:32:19,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:32:19,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333841242] [2021-10-13 21:32:19,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:32:19,337 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:32:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:32:19,339 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:32:19,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-13 21:32:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:32:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 21:32:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:32:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:32:20,485 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:32:20,486 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 [2021-10-13 21:32:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-13 21:32:21,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:32:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-13 21:32:24,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:32:24,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333841242] [2021-10-13 21:32:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333841242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:32:24,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:32:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:32:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156234685] [2021-10-13 21:32:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:32:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:32:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:32:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:32:24,073 INFO L87 Difference]: Start difference. First operand 6431 states and 27755 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-13 21:32:33,819 WARN L207 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-10-13 21:32:41,371 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2021-10-13 21:33:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:18,802 INFO L93 Difference]: Finished difference Result 12549 states and 50389 transitions. [2021-10-13 21:33:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:33:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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 23 [2021-10-13 21:33:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:18,848 INFO L225 Difference]: With dead ends: 12549 [2021-10-13 21:33:18,848 INFO L226 Difference]: Without dead ends: 12549 [2021-10-13 21:33:18,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 51748.4ms TimeCoverageRelationStatistics Valid=529, Invalid=1276, Unknown=1, NotChecked=0, Total=1806 [2021-10-13 21:33:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12549 states. [2021-10-13 21:33:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12549 to 5229. [2021-10-13 21:33:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 5224 states have (on average 4.284264931087289) internal successors, (22381), 5228 states have internal predecessors, (22381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 22381 transitions. [2021-10-13 21:33:19,032 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 22381 transitions. Word has length 23 [2021-10-13 21:33:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 22381 transitions. [2021-10-13 21:33:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-13 21:33:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 22381 transitions. [2021-10-13 21:33:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:33:19,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:19,038 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] [2021-10-13 21:33:19,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:19,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:19,239 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:33:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1633928916, now seen corresponding path program 1 times [2021-10-13 21:33:19,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:19,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976462078] [2021-10-13 21:33:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:33:19,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:19,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:19,242 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:19,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-13 21:33:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:33:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:33:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:20,265 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 21:33:20,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-13 21:33:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:20,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:20,820 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-13 21:33:20,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 61 [2021-10-13 21:33:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:21,648 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:33:21,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976462078] [2021-10-13 21:33:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976462078] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:33:21,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:33:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-13 21:33:21,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195467848] [2021-10-13 21:33:21,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 21:33:21,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:33:21,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 21:33:21,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:33:21,650 INFO L87 Difference]: Start difference. First operand 5229 states and 22381 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2021-10-13 21:33:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:33:22,362 INFO L93 Difference]: Finished difference Result 5654 states and 23812 transitions. [2021-10-13 21:33:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 21:33:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 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 [2021-10-13 21:33:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:33:22,380 INFO L225 Difference]: With dead ends: 5654 [2021-10-13 21:33:22,380 INFO L226 Difference]: Without dead ends: 5631 [2021-10-13 21:33:22,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:33:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-10-13 21:33:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 5373. [2021-10-13 21:33:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 5368 states have (on average 4.269374068554397) internal successors, (22918), 5372 states have internal predecessors, (22918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:33:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 22918 transitions. [2021-10-13 21:33:22,535 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 22918 transitions. Word has length 23 [2021-10-13 21:33:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:33:22,535 INFO L470 AbstractCegarLoop]: Abstraction has 5373 states and 22918 transitions. [2021-10-13 21:33:22,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2021-10-13 21:33:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 22918 transitions. [2021-10-13 21:33:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 21:33:22,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:33:22,543 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] [2021-10-13 21:33:22,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-13 21:33:22,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:33:22,744 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 21:33:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:33:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash -677515748, now seen corresponding path program 2 times [2021-10-13 21:33:22,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:33:22,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012881511] [2021-10-13 21:33:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:33:22,747 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:33:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:33:22,748 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:33:22,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-13 21:33:23,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:33:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:33:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:33:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:33:23,725 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 20 treesize of output 18 [2021-10-13 21:33:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:33:24,301 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-13 21:33:24,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 66 treesize of output 86 [2021-10-13 21:33:28,449 INFO L354 Elim1Store]: treesize reduction 282, result has 0.4 percent of original size [2021-10-13 21:33:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 93 treesize of output 39 [2021-10-13 21:33:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:33:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:33:33,686 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-13 21:33:33,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92308203498 treesize of output 53250844690 Received shutdown request... [2021-10-13 21:36:44,342 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:36:44,343 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 [2021-10-13 21:36:44,379 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:36:44,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-13 21:36:44,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:36:44,596 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. [2021-10-13 21:36:44,599 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,599 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:36:44,600 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:36:44,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:36:44,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:36:44,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:36:44,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:36:44,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:36:44,602 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:36:44,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:36:44,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:36:44,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:36:44,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:36:44,603 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-13 21:36:44,604 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-13 21:36:44,612 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:36:44,612 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:36:44,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:36:44 BasicIcfg [2021-10-13 21:36:44,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:36:44,615 INFO L168 Benchmark]: Toolchain (without parser) took 837964.09 ms. Allocated memory was 153.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 127.0 MB in the beginning and 583.4 MB in the end (delta: -456.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,615 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:36:44,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.32 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 113.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.06 ms. Allocated memory is still 153.1 MB. Free memory was 113.6 MB in the beginning and 111.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,617 INFO L168 Benchmark]: Boogie Preprocessor took 91.07 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 110.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,617 INFO L168 Benchmark]: RCFGBuilder took 766.90 ms. Allocated memory is still 153.1 MB. Free memory was 110.1 MB in the beginning and 120.1 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,617 INFO L168 Benchmark]: TraceAbstraction took 836671.24 ms. Allocated memory was 153.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 119.6 MB in the beginning and 583.4 MB in the end (delta: -463.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-10-13 21:36:44,619 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.32 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 113.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 88.06 ms. Allocated memory is still 153.1 MB. Free memory was 113.6 MB in the beginning and 111.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.07 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 110.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 766.90 ms. Allocated memory is still 153.1 MB. Free memory was 110.1 MB in the beginning and 120.1 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 836671.24 ms. Allocated memory was 153.1 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 119.6 MB in the beginning and 583.4 MB in the end (delta: -463.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 21533.6ms, 165 PlacesBefore, 55 PlacesAfterwards, 167 TransitionsBefore, 49 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 7 FixpointIterations, 91 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 169 TotalNumberOfCompositions, 3264 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3005, positive: 2973, positive conditional: 0, positive unconditional: 2973, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1579, positive: 1567, positive conditional: 0, positive unconditional: 1567, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1579, positive: 1567, positive conditional: 0, positive unconditional: 1567, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 840, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 840, negative conditional: 0, negative unconditional: 840, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3005, positive: 1406, positive conditional: 0, positive unconditional: 1406, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1579, unknown conditional: 0, unknown unconditional: 1579] , Statistics on independence cache: Total cache size (in pairs): 111, Positive cache size: 109, Positive conditional cache size: 0, Positive unconditional cache size: 109, 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: 90]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 57]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 57]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 65]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 65]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 101]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 101]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 82]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 82]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 83]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 83]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 84]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 84]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 85]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 85]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 86]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 86]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 87]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 87]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 71]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 83]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 82]: 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 backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∨-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 198 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 836495.2ms, OverallIterations: 56, TraceHistogramMax: 14, EmptinessCheckTime: 271.6ms, AutomataDifference: 473754.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21641.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3851 SDtfs, 31100 SDslu, 33443 SDs, 0 SdLazy, 41861 SolverSat, 1872 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 189368.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2231 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 1384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12005 ImplicationChecksByTransitivity, 316559.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6923occurred in iteration=52, InterpolantAutomatonStates: 1001, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8326.6ms AutomataMinimizationTime, 55 MinimizatonAttempts, 129009 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 506.7ms SsaConstructionTime, 6231.4ms SatisfiabilityAnalysisTime, 97139.0ms InterpolantComputationTime, 830 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1550 ConstructedInterpolants, 140 QuantifiedInterpolants, 21785 SizeOfPredicates, 577 NumberOfNonLiveVariables, 5615 ConjunctsInSsa, 882 ConjunctsInUnsatCore, 110 InterpolantComputations, 32 PerfectInterpolantSequences, 279/1256 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