/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-mts.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:18:57,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:18:57,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:18:57,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 16:18:57,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:18:57,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:18:57,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:18:57,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:18:57,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:18:57,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:18:57,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:18:57,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:18:57,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:18:57,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:18:57,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:18:57,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:18:57,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 16:18:57,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:18:57,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:18:57,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:18:57,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:18:57,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:18:57,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:18:57,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:18:57,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:18:57,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:18:57,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:18:57,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:18:57,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:18:57,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:18:57,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:18:57,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:18:57,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:18:57,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:18:57,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:18:57,418 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:18:57,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:18:57,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:18:57,418 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:18:57,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:18:57,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:18:57,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:18:57,421 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:18:57,421 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:18:57,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:18:57,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:18:57,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:18:57,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:18:57,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:18:57,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:18:57,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:18:57,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:18:57,423 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:18:57,423 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:18:57,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:18:57,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:18:57,424 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:18:57,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:18:57,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:18:57,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:18:57,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:18:57,901 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:18:57,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2021-10-07 16:18:57,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1daa80/8cafb9a23330433c94e0b6562112e761/FLAG38649ab00 [2021-10-07 16:18:58,770 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:18:58,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2021-10-07 16:18:58,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1daa80/8cafb9a23330433c94e0b6562112e761/FLAG38649ab00 [2021-10-07 16:18:59,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cde1daa80/8cafb9a23330433c94e0b6562112e761 [2021-10-07 16:18:59,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:18:59,107 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:18:59,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:18:59,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:18:59,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:18:59,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6285e2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59, skipping insertion in model container [2021-10-07 16:18:59,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:18:59,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:18:59,354 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-mts.wvr.c[2477,2490] [2021-10-07 16:18:59,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:59,381 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:18:59,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:18:59,412 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-mts.wvr.c[2477,2490] [2021-10-07 16:18:59,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:59,438 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:18:59,468 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-mts.wvr.c[2477,2490] [2021-10-07 16:18:59,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:18:59,495 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:18:59,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59 WrapperNode [2021-10-07 16:18:59,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:18:59,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:18:59,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:18:59,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:18:59,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:18:59,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:18:59,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:18:59,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:18:59,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:18:59,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:18:59,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:18:59,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:18:59,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (1/1) ... [2021-10-07 16:18:59,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:18:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:18:59,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:18:59,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:18:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:18:59,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:18:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:18:59,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:18:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:18:59,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:18:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:18:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:18:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 16:18:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 16:18:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:18:59,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:18:59,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:18:59,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:18:59,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:18:59,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:18:59,732 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:19:00,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:19:00,981 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:19:00,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:19:00 BoogieIcfgContainer [2021-10-07 16:19:00,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:19:00,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:19:00,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:19:00,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:19:00,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:18:59" (1/3) ... [2021-10-07 16:19:00,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe3a7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:19:00, skipping insertion in model container [2021-10-07 16:19:00,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:18:59" (2/3) ... [2021-10-07 16:19:00,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe3a7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:19:00, skipping insertion in model container [2021-10-07 16:19:00,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:19:00" (3/3) ... [2021-10-07 16:19:00,993 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2021-10-07 16:19:00,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:19:01,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2021-10-07 16:19:01,000 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:19:01,038 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,039 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,040 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,041 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,041 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,041 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,041 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,042 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,042 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,042 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,043 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,043 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,043 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,043 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,044 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,044 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,045 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,045 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,046 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,046 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,046 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,046 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,046 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,047 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,048 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,049 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,050 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,050 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,050 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,051 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,052 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,052 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,052 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,052 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,053 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,053 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,054 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,054 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,055 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,056 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,056 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,057 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,057 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,057 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,058 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,058 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,059 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,060 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,061 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,061 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,061 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,062 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,062 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,062 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,063 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,064 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,064 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,064 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,064 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,065 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,065 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,065 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,065 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,065 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,066 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,066 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,066 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,067 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,067 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,067 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,067 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,068 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,068 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,068 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,068 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,068 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,069 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,070 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,070 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,071 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,071 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,072 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,073 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,073 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,073 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,074 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,074 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,074 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,074 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,075 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,075 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,075 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,079 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,082 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,083 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,086 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,086 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,086 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,086 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,087 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~ite14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,087 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,087 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,087 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:19:01,095 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:19:01,150 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:19:01,158 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:19:01,158 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-10-07 16:19:01,179 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:19:01,192 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 193 transitions, 410 flow [2021-10-07 16:19:01,196 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 193 transitions, 410 flow [2021-10-07 16:19:01,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 188 places, 193 transitions, 410 flow [2021-10-07 16:19:01,280 INFO L129 PetriNetUnfolder]: 15/190 cut-off events. [2021-10-07 16:19:01,280 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:19:01,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 190 events. 15/190 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 317 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 135. Up to 2 conditions per place. [2021-10-07 16:19:01,296 INFO L116 LiptonReduction]: Number of co-enabled transitions 4804 [2021-10-07 16:19:30,045 INFO L131 LiptonReduction]: Checked pairs total: 7624 [2021-10-07 16:19:30,046 INFO L133 LiptonReduction]: Total number of compositions: 206 [2021-10-07 16:19:30,058 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 61 transitions, 146 flow [2021-10-07 16:19:30,212 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2926 states, 2252 states have (on average 4.928507992895204) internal successors, (11099), 2925 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 2926 states, 2252 states have (on average 4.928507992895204) internal successors, (11099), 2925 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:30,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:30,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:30,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 25275, now seen corresponding path program 1 times [2021-10-07 16:19:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:30,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431961280] [2021-10-07 16:19:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:30,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:30,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:30,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:19:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:19:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:30,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:30,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431961280] [2021-10-07 16:19:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431961280] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:30,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:30,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:30,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798318958] [2021-10-07 16:19:30,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:30,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:30,726 INFO L87 Difference]: Start difference. First operand has 2926 states, 2252 states have (on average 4.928507992895204) internal successors, (11099), 2925 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:30,965 INFO L93 Difference]: Finished difference Result 1040 states and 3905 transitions. [2021-10-07 16:19:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:19:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:19:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:31,005 INFO L225 Difference]: With dead ends: 1040 [2021-10-07 16:19:31,005 INFO L226 Difference]: Without dead ends: 1040 [2021-10-07 16:19:31,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-10-07 16:19:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1038. [2021-10-07 16:19:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 4.314917127071824) internal successors, (3905), 1037 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3905 transitions. [2021-10-07 16:19:31,170 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3905 transitions. Word has length 2 [2021-10-07 16:19:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:31,170 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3905 transitions. [2021-10-07 16:19:31,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3905 transitions. [2021-10-07 16:19:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:31,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:31,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:31,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:31,373 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash 25115, now seen corresponding path program 1 times [2021-10-07 16:19:31,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:31,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132086051] [2021-10-07 16:19:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:31,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:31,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:31,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:19:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:19:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:31,553 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:31,554 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 [2021-10-07 16:19:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:31,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:31,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132086051] [2021-10-07 16:19:31,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132086051] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:31,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:31,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:19:31,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466141901] [2021-10-07 16:19:31,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:19:31,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:19:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:31,627 INFO L87 Difference]: Start difference. First operand 1038 states and 3905 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:31,832 INFO L93 Difference]: Finished difference Result 1037 states and 3903 transitions. [2021-10-07 16:19:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:19:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:31,847 INFO L225 Difference]: With dead ends: 1037 [2021-10-07 16:19:31,847 INFO L226 Difference]: Without dead ends: 1037 [2021-10-07 16:19:31,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-10-07 16:19:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2021-10-07 16:19:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 4.312707182320442) internal successors, (3903), 1036 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3903 transitions. [2021-10-07 16:19:31,912 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3903 transitions. Word has length 2 [2021-10-07 16:19:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 3903 transitions. [2021-10-07 16:19:31,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3903 transitions. [2021-10-07 16:19:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:19:31,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:31,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:19:31,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:32,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:32,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash 25116, now seen corresponding path program 1 times [2021-10-07 16:19:32,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:32,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022550373] [2021-10-07 16:19:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:32,131 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:32,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:32,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:19:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:32,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:19:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:32,599 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:32,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:32,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:32,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022550373] [2021-10-07 16:19:32,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022550373] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:32,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:32,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:32,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183637017] [2021-10-07 16:19:32,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:32,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:32,822 INFO L87 Difference]: Start difference. First operand 1037 states and 3903 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:33,444 INFO L93 Difference]: Finished difference Result 1038 states and 3906 transitions. [2021-10-07 16:19:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:19:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:19:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:33,458 INFO L225 Difference]: With dead ends: 1038 [2021-10-07 16:19:33,458 INFO L226 Difference]: Without dead ends: 1038 [2021-10-07 16:19:33,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-10-07 16:19:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2021-10-07 16:19:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 906 states have (on average 4.311258278145695) internal successors, (3906), 1037 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3906 transitions. [2021-10-07 16:19:33,550 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3906 transitions. Word has length 2 [2021-10-07 16:19:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:33,550 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3906 transitions. [2021-10-07 16:19:33,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3906 transitions. [2021-10-07 16:19:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:19:33,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:33,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:19:33,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:33,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:33,760 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 783287, now seen corresponding path program 1 times [2021-10-07 16:19:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:33,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158524593] [2021-10-07 16:19:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:33,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:33,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:33,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:19:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:19:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:33,921 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-07 16:19:33,922 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 43 treesize of output 53 [2021-10-07 16:19:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:34,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:34,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:34,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158524593] [2021-10-07 16:19:34,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158524593] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:34,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:34,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:34,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346282222] [2021-10-07 16:19:34,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:34,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:34,115 INFO L87 Difference]: Start difference. First operand 1038 states and 3906 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:34,358 INFO L93 Difference]: Finished difference Result 857 states and 3124 transitions. [2021-10-07 16:19:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:34,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:19:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:34,369 INFO L225 Difference]: With dead ends: 857 [2021-10-07 16:19:34,369 INFO L226 Difference]: Without dead ends: 857 [2021-10-07 16:19:34,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-10-07 16:19:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2021-10-07 16:19:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 753 states have (on average 4.148738379814077) internal successors, (3124), 856 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 3124 transitions. [2021-10-07 16:19:34,410 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 3124 transitions. Word has length 3 [2021-10-07 16:19:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:34,411 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 3124 transitions. [2021-10-07 16:19:34,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 3124 transitions. [2021-10-07 16:19:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:19:34,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:34,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:19:34,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:34,627 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 783289, now seen corresponding path program 1 times [2021-10-07 16:19:34,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:34,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176107729] [2021-10-07 16:19:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:34,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:34,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:34,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:19:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:19:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:35,058 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:35,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 98 [2021-10-07 16:19:35,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 16:19:35,074 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 101 treesize of output 97 [2021-10-07 16:19:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:36,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:37,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:37,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176107729] [2021-10-07 16:19:37,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176107729] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:19:37,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:19:37,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-07 16:19:37,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195052069] [2021-10-07 16:19:37,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:37,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:37,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:19:37,180 INFO L87 Difference]: Start difference. First operand 857 states and 3124 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:37,388 INFO L93 Difference]: Finished difference Result 676 states and 2342 transitions. [2021-10-07 16:19:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:19:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:37,397 INFO L225 Difference]: With dead ends: 676 [2021-10-07 16:19:37,398 INFO L226 Difference]: Without dead ends: 676 [2021-10-07 16:19:37,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:19:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-10-07 16:19:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 676. [2021-10-07 16:19:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 600 states have (on average 3.9033333333333333) internal successors, (2342), 675 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2342 transitions. [2021-10-07 16:19:37,428 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2342 transitions. Word has length 3 [2021-10-07 16:19:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:37,429 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2342 transitions. [2021-10-07 16:19:37,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2342 transitions. [2021-10-07 16:19:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:19:37,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:37,430 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:19:37,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-07 16:19:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:37,643 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash 24281500, now seen corresponding path program 1 times [2021-10-07 16:19:37,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:37,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415676851] [2021-10-07 16:19:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:37,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:37,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:37,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:37,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:19:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:19:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:37,983 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:37,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:38,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:38,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:38,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415676851] [2021-10-07 16:19:38,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415676851] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:38,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:38,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:19:38,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580546550] [2021-10-07 16:19:38,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:38,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:38,687 INFO L87 Difference]: Start difference. First operand 676 states and 2342 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:40,944 INFO L93 Difference]: Finished difference Result 3364 states and 11690 transitions. [2021-10-07 16:19:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:19:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:19:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:40,992 INFO L225 Difference]: With dead ends: 3364 [2021-10-07 16:19:40,992 INFO L226 Difference]: Without dead ends: 3364 [2021-10-07 16:19:40,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-10-07 16:19:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 680. [2021-10-07 16:19:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 604 states have (on average 3.890728476821192) internal successors, (2350), 679 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2350 transitions. [2021-10-07 16:19:41,106 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2350 transitions. Word has length 4 [2021-10-07 16:19:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:41,106 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2350 transitions. [2021-10-07 16:19:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2350 transitions. [2021-10-07 16:19:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:19:41,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:41,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:19:41,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:41,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:41,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 752757498, now seen corresponding path program 1 times [2021-10-07 16:19:41,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:41,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838198262] [2021-10-07 16:19:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:41,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:41,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:41,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:19:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:19:41,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:41,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:41,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:41,807 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:41,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 89 [2021-10-07 16:19:41,816 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 91 treesize of output 89 [2021-10-07 16:19:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:45,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:45,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838198262] [2021-10-07 16:19:45,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838198262] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:45,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:45,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:19:45,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344213551] [2021-10-07 16:19:45,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:45,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:45,017 INFO L87 Difference]: Start difference. First operand 680 states and 2350 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:45,836 INFO L93 Difference]: Finished difference Result 1279 states and 4469 transitions. [2021-10-07 16:19:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:19:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:45,850 INFO L225 Difference]: With dead ends: 1279 [2021-10-07 16:19:45,851 INFO L226 Difference]: Without dead ends: 1279 [2021-10-07 16:19:45,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-10-07 16:19:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 644. [2021-10-07 16:19:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 580 states have (on average 3.8655172413793104) internal successors, (2242), 643 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2242 transitions. [2021-10-07 16:19:45,886 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2242 transitions. Word has length 5 [2021-10-07 16:19:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:45,887 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 2242 transitions. [2021-10-07 16:19:45,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2242 transitions. [2021-10-07 16:19:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:19:45,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:45,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:19:45,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-07 16:19:46,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash 752757499, now seen corresponding path program 1 times [2021-10-07 16:19:46,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:46,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605405549] [2021-10-07 16:19:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:46,105 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:46,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:19:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:19:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:46,292 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:46,293 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 [2021-10-07 16:19:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:46,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:46,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605405549] [2021-10-07 16:19:46,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605405549] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:46,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:46,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:19:46,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190406954] [2021-10-07 16:19:46,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:46,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:46,530 INFO L87 Difference]: Start difference. First operand 644 states and 2242 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:46,655 INFO L93 Difference]: Finished difference Result 608 states and 2134 transitions. [2021-10-07 16:19:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:19:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:46,664 INFO L225 Difference]: With dead ends: 608 [2021-10-07 16:19:46,665 INFO L226 Difference]: Without dead ends: 608 [2021-10-07 16:19:46,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-10-07 16:19:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-10-07 16:19:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 556 states have (on average 3.838129496402878) internal successors, (2134), 607 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2134 transitions. [2021-10-07 16:19:46,689 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2134 transitions. Word has length 5 [2021-10-07 16:19:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:46,690 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 2134 transitions. [2021-10-07 16:19:46,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2134 transitions. [2021-10-07 16:19:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:19:46,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:46,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:19:46,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:46,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,912 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1860639551, now seen corresponding path program 1 times [2021-10-07 16:19:46,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:46,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475761782] [2021-10-07 16:19:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:46,914 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:46,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:46,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:46,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:19:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:19:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:47,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:47,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-07 16:19:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:47,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475761782] [2021-10-07 16:19:47,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475761782] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:47,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:47,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:19:47,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120882712] [2021-10-07 16:19:47,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:19:47,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:19:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:47,457 INFO L87 Difference]: Start difference. First operand 608 states and 2134 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:48,743 INFO L93 Difference]: Finished difference Result 2059 states and 7289 transitions. [2021-10-07 16:19:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:19:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:19:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:48,764 INFO L225 Difference]: With dead ends: 2059 [2021-10-07 16:19:48,764 INFO L226 Difference]: Without dead ends: 2059 [2021-10-07 16:19:48,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:19:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-10-07 16:19:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 694. [2021-10-07 16:19:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 642 states have (on average 4.193146417445483) internal successors, (2692), 693 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2692 transitions. [2021-10-07 16:19:48,807 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2692 transitions. Word has length 6 [2021-10-07 16:19:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:48,808 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2692 transitions. [2021-10-07 16:19:48,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2692 transitions. [2021-10-07 16:19:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:19:48,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:48,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:19:48,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:49,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:49,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1860639552, now seen corresponding path program 1 times [2021-10-07 16:19:49,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:49,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955671984] [2021-10-07 16:19:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:49,024 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:49,025 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:49,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:19:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:49,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:19:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:49,166 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:49,166 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 [2021-10-07 16:19:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:49,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:49,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:49,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955671984] [2021-10-07 16:19:49,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955671984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:49,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:49,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:19:49,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119776396] [2021-10-07 16:19:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:19:49,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:19:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:19:49,236 INFO L87 Difference]: Start difference. First operand 694 states and 2692 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:49,412 INFO L93 Difference]: Finished difference Result 440 states and 1660 transitions. [2021-10-07 16:19:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:19:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:19:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:49,417 INFO L225 Difference]: With dead ends: 440 [2021-10-07 16:19:49,417 INFO L226 Difference]: Without dead ends: 440 [2021-10-07 16:19:49,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:19:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-07 16:19:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-10-07 16:19:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 419 states have (on average 3.9618138424821003) internal successors, (1660), 439 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1660 transitions. [2021-10-07 16:19:49,436 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1660 transitions. Word has length 6 [2021-10-07 16:19:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:49,439 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1660 transitions. [2021-10-07 16:19:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1660 transitions. [2021-10-07 16:19:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:49,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:49,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:49,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:49,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:49,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1845255490, now seen corresponding path program 1 times [2021-10-07 16:19:49,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:49,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928893856] [2021-10-07 16:19:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:49,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:49,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:49,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:19:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:19:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:49,991 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:50,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:50,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928893856] [2021-10-07 16:19:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928893856] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:50,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:19:50,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840801176] [2021-10-07 16:19:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:19:50,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:19:50,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:50,699 INFO L87 Difference]: Start difference. First operand 440 states and 1660 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:52,057 INFO L93 Difference]: Finished difference Result 932 states and 3582 transitions. [2021-10-07 16:19:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:19:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:19:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:52,066 INFO L225 Difference]: With dead ends: 932 [2021-10-07 16:19:52,067 INFO L226 Difference]: Without dead ends: 932 [2021-10-07 16:19:52,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:19:52,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-10-07 16:19:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 812. [2021-10-07 16:19:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 791 states have (on average 4.128950695322377) internal successors, (3266), 811 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 3266 transitions. [2021-10-07 16:19:52,101 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 3266 transitions. Word has length 7 [2021-10-07 16:19:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:52,101 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 3266 transitions. [2021-10-07 16:19:52,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 3266 transitions. [2021-10-07 16:19:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:52,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:52,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:52,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:52,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:52,316 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1845469457, now seen corresponding path program 1 times [2021-10-07 16:19:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:52,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362131156] [2021-10-07 16:19:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:52,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:52,320 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:52,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:19:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:19:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:52,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:52,692 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:52,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:53,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:53,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362131156] [2021-10-07 16:19:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362131156] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:53,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:53,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:19:53,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409831223] [2021-10-07 16:19:53,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:19:53,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:19:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:19:53,204 INFO L87 Difference]: Start difference. First operand 812 states and 3266 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:53,651 INFO L93 Difference]: Finished difference Result 1487 states and 6037 transitions. [2021-10-07 16:19:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:19:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:19:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:53,664 INFO L225 Difference]: With dead ends: 1487 [2021-10-07 16:19:53,664 INFO L226 Difference]: Without dead ends: 1487 [2021-10-07 16:19:53,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:19:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-10-07 16:19:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 748. [2021-10-07 16:19:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 733 states have (on average 4.128240109140519) internal successors, (3026), 747 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 3026 transitions. [2021-10-07 16:19:53,704 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 3026 transitions. Word has length 7 [2021-10-07 16:19:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:53,705 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 3026 transitions. [2021-10-07 16:19:53,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 3026 transitions. [2021-10-07 16:19:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:19:53,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:53,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:19:53,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:53,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:53,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1845469458, now seen corresponding path program 1 times [2021-10-07 16:19:53,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:53,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260069683] [2021-10-07 16:19:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:19:53,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:53,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:53,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:19:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:19:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:19:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:54,109 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 16:19:54,110 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 [2021-10-07 16:19:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:54,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:19:54,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260069683] [2021-10-07 16:19:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260069683] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:19:54,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:19:54,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:19:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828158895] [2021-10-07 16:19:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:19:54,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:19:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:54,177 INFO L87 Difference]: Start difference. First operand 748 states and 3026 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:19:54,279 INFO L93 Difference]: Finished difference Result 684 states and 2786 transitions. [2021-10-07 16:19:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:19:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:19:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:19:54,285 INFO L225 Difference]: With dead ends: 684 [2021-10-07 16:19:54,286 INFO L226 Difference]: Without dead ends: 684 [2021-10-07 16:19:54,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:19:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-07 16:19:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2021-10-07 16:19:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 675 states have (on average 4.127407407407407) internal successors, (2786), 683 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2786 transitions. [2021-10-07 16:19:54,312 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2786 transitions. Word has length 7 [2021-10-07 16:19:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:19:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 2786 transitions. [2021-10-07 16:19:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:19:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2786 transitions. [2021-10-07 16:19:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:19:54,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:19:54,314 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:19:54,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 16:19:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:19:54,527 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:19:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:19:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 590422172, now seen corresponding path program 2 times [2021-10-07 16:19:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:19:54,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030264561] [2021-10-07 16:19:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:19:54,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:19:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:19:54,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:19:54,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:19:54,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:19:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:19:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:19:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:19:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:19:54,931 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:19:54,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:19:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:55,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:19:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:19:56,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:19:56,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030264561] [2021-10-07 16:19:56,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030264561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:19:56,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:19:56,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:19:56,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024124227] [2021-10-07 16:19:56,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:19:56,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:19:56,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:19:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:19:56,808 INFO L87 Difference]: Start difference. First operand 684 states and 2786 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:06,297 INFO L93 Difference]: Finished difference Result 8792 states and 36054 transitions. [2021-10-07 16:20:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:20:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:20:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:06,366 INFO L225 Difference]: With dead ends: 8792 [2021-10-07 16:20:06,366 INFO L226 Difference]: Without dead ends: 8792 [2021-10-07 16:20:06,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5795.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:20:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8792 states. [2021-10-07 16:20:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8792 to 692. [2021-10-07 16:20:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 683 states have (on average 4.102489019033675) internal successors, (2802), 691 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2802 transitions. [2021-10-07 16:20:06,516 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2802 transitions. Word has length 8 [2021-10-07 16:20:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:06,518 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2802 transitions. [2021-10-07 16:20:06,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2802 transitions. [2021-10-07 16:20:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:20:06,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:06,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:06,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:06,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:06,734 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1374972104, now seen corresponding path program 1 times [2021-10-07 16:20:06,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:06,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689532393] [2021-10-07 16:20:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:06,738 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:06,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:06,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:06,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:20:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:20:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:06,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:07,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-07 16:20:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:07,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:07,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689532393] [2021-10-07 16:20:07,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689532393] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:07,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:07,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:20:07,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417938471] [2021-10-07 16:20:07,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:20:07,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:07,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:20:07,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:20:07,387 INFO L87 Difference]: Start difference. First operand 692 states and 2802 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:08,453 INFO L93 Difference]: Finished difference Result 2155 states and 8937 transitions. [2021-10-07 16:20:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:20:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:20:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:08,466 INFO L225 Difference]: With dead ends: 2155 [2021-10-07 16:20:08,467 INFO L226 Difference]: Without dead ends: 2155 [2021-10-07 16:20:08,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:20:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-10-07 16:20:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 820. [2021-10-07 16:20:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 811 states have (on average 4.401972872996301) internal successors, (3570), 819 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 3570 transitions. [2021-10-07 16:20:08,531 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 3570 transitions. Word has length 8 [2021-10-07 16:20:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:08,532 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 3570 transitions. [2021-10-07 16:20:08,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 3570 transitions. [2021-10-07 16:20:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:20:08,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:08,533 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:08,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:08,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:08,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:08,747 INFO L82 PathProgramCache]: Analyzing trace with hash -325533566, now seen corresponding path program 1 times [2021-10-07 16:20:08,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:08,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448850328] [2021-10-07 16:20:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:08,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:08,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:08,750 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:08,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:20:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:20:08,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:08,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:09,184 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:09,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:09,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:10,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:10,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448850328] [2021-10-07 16:20:10,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448850328] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:10,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:10,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:20:10,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505936139] [2021-10-07 16:20:10,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:20:10,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:10,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:20:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:20:10,103 INFO L87 Difference]: Start difference. First operand 820 states and 3570 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:11,962 INFO L93 Difference]: Finished difference Result 2258 states and 9896 transitions. [2021-10-07 16:20:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:20:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:11,974 INFO L225 Difference]: With dead ends: 2258 [2021-10-07 16:20:11,975 INFO L226 Difference]: Without dead ends: 2258 [2021-10-07 16:20:11,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:20:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-10-07 16:20:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1460. [2021-10-07 16:20:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1451 states have (on average 5.018607856650585) internal successors, (7282), 1459 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7282 transitions. [2021-10-07 16:20:12,073 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7282 transitions. Word has length 9 [2021-10-07 16:20:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:12,074 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 7282 transitions. [2021-10-07 16:20:12,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7282 transitions. [2021-10-07 16:20:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:20:12,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:12,076 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:12,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:12,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:12,289 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash 724108287, now seen corresponding path program 2 times [2021-10-07 16:20:12,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:12,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406242850] [2021-10-07 16:20:12,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:20:12,291 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:12,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:12,293 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:12,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:20:12,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:20:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:20:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:12,789 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:12,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:13,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:14,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:14,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406242850] [2021-10-07 16:20:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406242850] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:14,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:14,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:20:14,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756158523] [2021-10-07 16:20:14,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:20:14,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:20:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:20:14,495 INFO L87 Difference]: Start difference. First operand 1460 states and 7282 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:32,786 INFO L93 Difference]: Finished difference Result 4728 states and 22240 transitions. [2021-10-07 16:20:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 16:20:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:20:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:32,806 INFO L225 Difference]: With dead ends: 4728 [2021-10-07 16:20:32,806 INFO L226 Difference]: Without dead ends: 4728 [2021-10-07 16:20:32,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6155.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:20:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2021-10-07 16:20:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 2358. [2021-10-07 16:20:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2349 states have (on average 4.987654320987654) internal successors, (11716), 2357 states have internal predecessors, (11716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 11716 transitions. [2021-10-07 16:20:32,936 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 11716 transitions. Word has length 10 [2021-10-07 16:20:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:32,937 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 11716 transitions. [2021-10-07 16:20:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 11716 transitions. [2021-10-07 16:20:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:20:32,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:32,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:32,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:33,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:33,157 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1495245877, now seen corresponding path program 1 times [2021-10-07 16:20:33,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:33,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418369284] [2021-10-07 16:20:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:33,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:33,160 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:20:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:33,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:20:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:33,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:33,636 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:34,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418369284] [2021-10-07 16:20:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418369284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:34,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:34,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:20:34,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057498816] [2021-10-07 16:20:34,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:20:34,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:20:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:20:34,756 INFO L87 Difference]: Start difference. First operand 2358 states and 11716 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:39,594 INFO L93 Difference]: Finished difference Result 4586 states and 22679 transitions. [2021-10-07 16:20:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:20:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:20:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:39,615 INFO L225 Difference]: With dead ends: 4586 [2021-10-07 16:20:39,615 INFO L226 Difference]: Without dead ends: 4586 [2021-10-07 16:20:39,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2201.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:20:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-10-07 16:20:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3378. [2021-10-07 16:20:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3369 states have (on average 5.041258533689522) internal successors, (16984), 3377 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 16984 transitions. [2021-10-07 16:20:39,821 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 16984 transitions. Word has length 10 [2021-10-07 16:20:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:39,821 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 16984 transitions. [2021-10-07 16:20:39,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 16984 transitions. [2021-10-07 16:20:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:20:39,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:39,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:39,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:40,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:40,038 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1501643138, now seen corresponding path program 1 times [2021-10-07 16:20:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:40,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124035765] [2021-10-07 16:20:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:40,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:40,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:40,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:20:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:20:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:40,494 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:40,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:20:41,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:41,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124035765] [2021-10-07 16:20:41,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124035765] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:41,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:41,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:20:41,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088058137] [2021-10-07 16:20:41,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:20:41,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:20:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:20:41,627 INFO L87 Difference]: Start difference. First operand 3378 states and 16984 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:44,149 INFO L93 Difference]: Finished difference Result 6412 states and 30264 transitions. [2021-10-07 16:20:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 16:20:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:20:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:44,176 INFO L225 Difference]: With dead ends: 6412 [2021-10-07 16:20:44,176 INFO L226 Difference]: Without dead ends: 6412 [2021-10-07 16:20:44,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1549.2ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:20:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-10-07 16:20:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 3676. [2021-10-07 16:20:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3667 states have (on average 4.714480501772566) internal successors, (17288), 3675 states have internal predecessors, (17288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 17288 transitions. [2021-10-07 16:20:44,412 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 17288 transitions. Word has length 10 [2021-10-07 16:20:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:44,412 INFO L470 AbstractCegarLoop]: Abstraction has 3676 states and 17288 transitions. [2021-10-07 16:20:44,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 17288 transitions. [2021-10-07 16:20:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:20:44,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:44,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:20:44,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:20:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:44,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash 892022247, now seen corresponding path program 1 times [2021-10-07 16:20:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:44,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621196621] [2021-10-07 16:20:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:20:44,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:44,633 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:20:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:20:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:20:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:45,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:45,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:45,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621196621] [2021-10-07 16:20:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621196621] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:45,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:45,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:20:45,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530307272] [2021-10-07 16:20:45,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:20:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:20:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:20:45,410 INFO L87 Difference]: Start difference. First operand 3676 states and 17288 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:20:46,186 INFO L93 Difference]: Finished difference Result 3682 states and 17056 transitions. [2021-10-07 16:20:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:20:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:20:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:20:46,201 INFO L225 Difference]: With dead ends: 3682 [2021-10-07 16:20:46,201 INFO L226 Difference]: Without dead ends: 3682 [2021-10-07 16:20:46,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 453.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-07 16:20:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-10-07 16:20:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3630. [2021-10-07 16:20:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3621 states have (on average 4.676056338028169) internal successors, (16932), 3629 states have internal predecessors, (16932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 16932 transitions. [2021-10-07 16:20:46,366 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 16932 transitions. Word has length 11 [2021-10-07 16:20:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:20:46,367 INFO L470 AbstractCegarLoop]: Abstraction has 3630 states and 16932 transitions. [2021-10-07 16:20:46,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:20:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 16932 transitions. [2021-10-07 16:20:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:20:46,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:20:46,369 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-07 16:20:46,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 16:20:46,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:20:46,582 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:20:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:20:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -566667514, now seen corresponding path program 3 times [2021-10-07 16:20:46,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:20:46,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490095458] [2021-10-07 16:20:46,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:20:46,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:20:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:20:46,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:20:46,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:20:46,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 16:20:46,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:20:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:20:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:20:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:20:47,193 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:20:47,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:20:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:47,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:20:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:20:50,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:20:50,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490095458] [2021-10-07 16:20:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490095458] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:20:50,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:20:50,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-07 16:20:50,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042907034] [2021-10-07 16:20:50,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 16:20:50,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:20:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 16:20:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-10-07 16:20:50,873 INFO L87 Difference]: Start difference. First operand 3630 states and 16932 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:25,564 INFO L93 Difference]: Finished difference Result 10442 states and 48004 transitions. [2021-10-07 16:21:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:21:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:21:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:25,616 INFO L225 Difference]: With dead ends: 10442 [2021-10-07 16:21:25,616 INFO L226 Difference]: Without dead ends: 10442 [2021-10-07 16:21:25,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 11517.8ms TimeCoverageRelationStatistics Valid=501, Invalid=1221, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 16:21:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-10-07 16:21:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 5630. [2021-10-07 16:21:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 5621 states have (on average 4.9770503469133605) internal successors, (27976), 5629 states have internal predecessors, (27976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 27976 transitions. [2021-10-07 16:21:25,969 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 27976 transitions. Word has length 12 [2021-10-07 16:21:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:25,970 INFO L470 AbstractCegarLoop]: Abstraction has 5630 states and 27976 transitions. [2021-10-07 16:21:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 27976 transitions. [2021-10-07 16:21:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:21:25,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:25,974 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:21:25,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 16:21:26,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:26,188 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:21:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash -647169941, now seen corresponding path program 2 times [2021-10-07 16:21:26,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:26,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969714676] [2021-10-07 16:21:26,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:21:26,191 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:26,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:21:26,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:21:26,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:21:26,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:21:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:26,744 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:28,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:28,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969714676] [2021-10-07 16:21:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969714676] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:28,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:28,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-07 16:21:28,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631469250] [2021-10-07 16:21:28,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:21:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:21:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:21:28,908 INFO L87 Difference]: Start difference. First operand 5630 states and 27976 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:37,702 INFO L93 Difference]: Finished difference Result 9118 states and 45246 transitions. [2021-10-07 16:21:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 16:21:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:21:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:37,795 INFO L225 Difference]: With dead ends: 9118 [2021-10-07 16:21:37,796 INFO L226 Difference]: Without dead ends: 9118 [2021-10-07 16:21:37,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5050.9ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:21:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2021-10-07 16:21:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 7176. [2021-10-07 16:21:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7167 states have (on average 5.132133389144691) internal successors, (36782), 7175 states have internal predecessors, (36782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 36782 transitions. [2021-10-07 16:21:38,364 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 36782 transitions. Word has length 12 [2021-10-07 16:21:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:38,367 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 36782 transitions. [2021-10-07 16:21:38,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 36782 transitions. [2021-10-07 16:21:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:21:38,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:38,376 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:21:38,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-07 16:21:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:21:38,577 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:21:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:21:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash 69830472, now seen corresponding path program 2 times [2021-10-07 16:21:38,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:21:38,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951920634] [2021-10-07 16:21:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:21:38,578 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:21:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:21:38,580 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:21:38,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:21:38,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:21:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:21:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:21:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:21:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:21:39,119 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:21:39,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:21:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:39,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:21:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:21:41,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:21:41,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951920634] [2021-10-07 16:21:41,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951920634] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:21:41,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:21:41,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 16:21:41,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319083683] [2021-10-07 16:21:41,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 16:21:41,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:21:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 16:21:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:21:41,155 INFO L87 Difference]: Start difference. First operand 7176 states and 36782 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:21:59,261 INFO L93 Difference]: Finished difference Result 10474 states and 50403 transitions. [2021-10-07 16:21:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 16:21:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:21:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:21:59,330 INFO L225 Difference]: With dead ends: 10474 [2021-10-07 16:21:59,330 INFO L226 Difference]: Without dead ends: 10474 [2021-10-07 16:21:59,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5994.4ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:21:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10474 states. [2021-10-07 16:21:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10474 to 7594. [2021-10-07 16:21:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7585 states have (on average 5.166381015161503) internal successors, (39187), 7593 states have internal predecessors, (39187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 39187 transitions. [2021-10-07 16:21:59,863 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 39187 transitions. Word has length 12 [2021-10-07 16:21:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:21:59,863 INFO L470 AbstractCegarLoop]: Abstraction has 7594 states and 39187 transitions. [2021-10-07 16:21:59,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:21:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 39187 transitions. [2021-10-07 16:21:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:21:59,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:21:59,882 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-07 16:21:59,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:00,083 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash -365221509, now seen corresponding path program 4 times [2021-10-07 16:22:00,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:00,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937847837] [2021-10-07 16:22:00,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:22:00,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:00,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:00,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:22:00,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:22:00,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:22:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:00,604 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:00,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:02,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:02,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937847837] [2021-10-07 16:22:02,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937847837] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:02,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:22:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490320263] [2021-10-07 16:22:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:22:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:22:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:22:02,311 INFO L87 Difference]: Start difference. First operand 7594 states and 39187 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) 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) [2021-10-07 16:22:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:12,304 INFO L93 Difference]: Finished difference Result 17612 states and 85021 transitions. [2021-10-07 16:22:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 16:22:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) 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 13 [2021-10-07 16:22:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:12,415 INFO L225 Difference]: With dead ends: 17612 [2021-10-07 16:22:12,415 INFO L226 Difference]: Without dead ends: 17612 [2021-10-07 16:22:12,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7035.3ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:22:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17612 states. [2021-10-07 16:22:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17612 to 9564. [2021-10-07 16:22:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9555 states have (on average 5.066562009419152) internal successors, (48411), 9563 states have internal predecessors, (48411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 48411 transitions. [2021-10-07 16:22:13,168 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 48411 transitions. Word has length 13 [2021-10-07 16:22:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:13,169 INFO L470 AbstractCegarLoop]: Abstraction has 9564 states and 48411 transitions. [2021-10-07 16:22:13,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) 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) [2021-10-07 16:22:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 48411 transitions. [2021-10-07 16:22:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:22:13,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:13,172 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:13,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:13,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:13,385 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1710391623, now seen corresponding path program 2 times [2021-10-07 16:22:13,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:13,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495902554] [2021-10-07 16:22:13,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:22:13,388 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:13,389 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:22:13,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:22:13,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:22:13,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:13,899 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:14,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:15,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:15,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495902554] [2021-10-07 16:22:15,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495902554] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:22:15,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:22:15,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:22:15,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3802438] [2021-10-07 16:22:15,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:22:15,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:22:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:22:15,594 INFO L87 Difference]: Start difference. First operand 9564 states and 48411 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:16,342 INFO L93 Difference]: Finished difference Result 10994 states and 54383 transitions. [2021-10-07 16:22:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:22:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:22:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:16,534 INFO L225 Difference]: With dead ends: 10994 [2021-10-07 16:22:16,534 INFO L226 Difference]: Without dead ends: 10994 [2021-10-07 16:22:16,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:22:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2021-10-07 16:22:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 6705. [2021-10-07 16:22:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6696 states have (on average 4.873655913978495) internal successors, (32634), 6704 states have internal predecessors, (32634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 32634 transitions. [2021-10-07 16:22:16,881 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 32634 transitions. Word has length 13 [2021-10-07 16:22:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 6705 states and 32634 transitions. [2021-10-07 16:22:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 32634 transitions. [2021-10-07 16:22:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:22:16,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:16,886 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:16,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:17,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:17,101 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash -282370357, now seen corresponding path program 3 times [2021-10-07 16:22:17,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:17,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278520111] [2021-10-07 16:22:17,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:22:17,104 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:17,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:17,105 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:17,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:22:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:22:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:22:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:17,773 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:22:18,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:22:21,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:21,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278520111] [2021-10-07 16:22:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278520111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:21,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:21,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:22:21,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100800917] [2021-10-07 16:22:21,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:22:21,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:22:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:22:21,009 INFO L87 Difference]: Start difference. First operand 6705 states and 32634 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:22,833 INFO L93 Difference]: Finished difference Result 7101 states and 33752 transitions. [2021-10-07 16:22:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:22:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:22:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:22,863 INFO L225 Difference]: With dead ends: 7101 [2021-10-07 16:22:22,864 INFO L226 Difference]: Without dead ends: 7101 [2021-10-07 16:22:22,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1239.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:22:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-10-07 16:22:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 4997. [2021-10-07 16:22:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4992 states have (on average 4.7295673076923075) internal successors, (23610), 4996 states have internal predecessors, (23610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 23610 transitions. [2021-10-07 16:22:23,006 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 23610 transitions. Word has length 14 [2021-10-07 16:22:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 4997 states and 23610 transitions. [2021-10-07 16:22:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 23610 transitions. [2021-10-07 16:22:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:22:23,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:23,011 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:23,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:23,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:23,225 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash 469805958, now seen corresponding path program 3 times [2021-10-07 16:22:23,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:23,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69453785] [2021-10-07 16:22:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:22:23,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:23,229 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:23,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:22:23,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:22:23,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:23,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:22:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:23,930 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:23,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:24,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:22:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:22:24,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:22:24,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:24,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69453785] [2021-10-07 16:22:24,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69453785] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:24,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:24,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 16:22:24,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173134482] [2021-10-07 16:22:24,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 16:22:24,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 16:22:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:22:24,749 INFO L87 Difference]: Start difference. First operand 4997 states and 23610 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:28,881 INFO L93 Difference]: Finished difference Result 5019 states and 22383 transitions. [2021-10-07 16:22:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 16:22:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:22:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:28,901 INFO L225 Difference]: With dead ends: 5019 [2021-10-07 16:22:28,901 INFO L226 Difference]: Without dead ends: 5019 [2021-10-07 16:22:28,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1905.7ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-10-07 16:22:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-10-07 16:22:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4499. [2021-10-07 16:22:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4494 states have (on average 4.684023141967067) internal successors, (21050), 4498 states have internal predecessors, (21050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 21050 transitions. [2021-10-07 16:22:29,077 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 21050 transitions. Word has length 14 [2021-10-07 16:22:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:29,077 INFO L470 AbstractCegarLoop]: Abstraction has 4499 states and 21050 transitions. [2021-10-07 16:22:29,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 21050 transitions. [2021-10-07 16:22:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 16:22:29,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:29,095 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:22:29,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:29,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:29,304 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1195916740, now seen corresponding path program 4 times [2021-10-07 16:22:29,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:29,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141311962] [2021-10-07 16:22:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:22:29,307 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:29,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:29,308 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:29,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:22:29,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:22:29,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:29,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:22:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:29,956 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:30,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 16:22:32,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141311962] [2021-10-07 16:22:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141311962] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:32,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:32,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:22:32,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456898332] [2021-10-07 16:22:32,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:22:32,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:22:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:22:32,059 INFO L87 Difference]: Start difference. First operand 4499 states and 21050 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:22:45,889 INFO L93 Difference]: Finished difference Result 11391 states and 52551 transitions. [2021-10-07 16:22:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 16:22:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 16:22:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:22:45,932 INFO L225 Difference]: With dead ends: 11391 [2021-10-07 16:22:45,932 INFO L226 Difference]: Without dead ends: 11391 [2021-10-07 16:22:45,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 10085.1ms TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2021-10-07 16:22:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-10-07 16:22:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 6682. [2021-10-07 16:22:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6677 states have (on average 4.905346712595477) internal successors, (32753), 6681 states have internal predecessors, (32753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 32753 transitions. [2021-10-07 16:22:46,123 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 32753 transitions. Word has length 15 [2021-10-07 16:22:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:22:46,124 INFO L470 AbstractCegarLoop]: Abstraction has 6682 states and 32753 transitions. [2021-10-07 16:22:46,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:22:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 32753 transitions. [2021-10-07 16:22:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:22:46,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:22:46,127 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:22:46,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:22:46,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:22:46,328 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:22:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:22:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -80224612, now seen corresponding path program 3 times [2021-10-07 16:22:46,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:22:46,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556875387] [2021-10-07 16:22:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:22:46,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:22:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:22:46,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:22:46,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:22:46,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:22:46,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:22:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:22:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:22:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:22:47,131 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:22:47,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:22:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:48,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:22:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:22:55,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:22:55,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556875387] [2021-10-07 16:22:55,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556875387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:22:55,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:22:55,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:22:55,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431152515] [2021-10-07 16:22:55,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:22:55,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:22:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:22:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:22:55,062 INFO L87 Difference]: Start difference. First operand 6682 states and 32753 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:23:05,965 WARN L207 SmtUtils]: Spent 6.73 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:23:14,246 WARN L207 SmtUtils]: Spent 7.15 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:23:20,569 WARN L207 SmtUtils]: Spent 5.33 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:23:26,749 WARN L207 SmtUtils]: Spent 5.09 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-07 16:24:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:24:01,809 INFO L93 Difference]: Finished difference Result 163056 states and 821328 transitions. [2021-10-07 16:24:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:24:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:24:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:24:04,791 INFO L225 Difference]: With dead ends: 163056 [2021-10-07 16:24:04,791 INFO L226 Difference]: Without dead ends: 163056 [2021-10-07 16:24:04,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 53540.5ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:24:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163056 states. [2021-10-07 16:24:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163056 to 6698. [2021-10-07 16:24:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6698 states, 6693 states have (on average 4.898401314806514) internal successors, (32785), 6697 states have internal predecessors, (32785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:24:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6698 states to 6698 states and 32785 transitions. [2021-10-07 16:24:08,504 INFO L78 Accepts]: Start accepts. Automaton has 6698 states and 32785 transitions. Word has length 16 [2021-10-07 16:24:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:24:08,505 INFO L470 AbstractCegarLoop]: Abstraction has 6698 states and 32785 transitions. [2021-10-07 16:24:08,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:24:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6698 states and 32785 transitions. [2021-10-07 16:24:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 16:24:08,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:24:08,514 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1] [2021-10-07 16:24:08,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-07 16:24:08,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:24:08,728 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:24:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:24:08,730 INFO L82 PathProgramCache]: Analyzing trace with hash 811560095, now seen corresponding path program 5 times [2021-10-07 16:24:08,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:24:08,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131042235] [2021-10-07 16:24:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:24:08,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:24:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:24:08,732 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:24:08,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:24:09,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-07 16:24:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:24:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:24:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:24:09,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:24:09,532 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:24:09,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:24:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:24:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:24:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:24:15,648 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:24:15,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131042235] [2021-10-07 16:24:15,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131042235] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:24:15,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:24:15,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2021-10-07 16:24:15,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353034434] [2021-10-07 16:24:15,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 16:24:15,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:24:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 16:24:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:24:15,650 INFO L87 Difference]: Start difference. First operand 6698 states and 32785 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:25:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:25:39,261 INFO L93 Difference]: Finished difference Result 21076 states and 95676 transitions. [2021-10-07 16:25:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-07 16:25:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-10-07 16:25:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:25:39,366 INFO L225 Difference]: With dead ends: 21076 [2021-10-07 16:25:39,367 INFO L226 Difference]: Without dead ends: 21076 [2021-10-07 16:25:39,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 34612.5ms TimeCoverageRelationStatistics Valid=910, Invalid=4202, Unknown=0, NotChecked=0, Total=5112 [2021-10-07 16:25:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21076 states. [2021-10-07 16:25:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21076 to 9564. [2021-10-07 16:25:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9559 states have (on average 4.913380060675803) internal successors, (46967), 9563 states have internal predecessors, (46967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:25:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 46967 transitions. [2021-10-07 16:25:39,871 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 46967 transitions. Word has length 18 [2021-10-07 16:25:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:25:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 9564 states and 46967 transitions. [2021-10-07 16:25:39,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:25:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 46967 transitions. [2021-10-07 16:25:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:25:39,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:25:39,885 INFO L512 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1] [2021-10-07 16:25:39,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-07 16:25:40,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:25:40,099 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:25:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:25:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash 565132902, now seen corresponding path program 6 times [2021-10-07 16:25:40,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:25:40,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247464577] [2021-10-07 16:25:40,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:25:40,102 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:25:40,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:25:40,103 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:25:40,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 16:25:40,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-07 16:25:40,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:25:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 16:25:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:25:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:25:41,121 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:25:41,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:25:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 16:25:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:25:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 16:25:48,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:25:48,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247464577] [2021-10-07 16:25:48,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247464577] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:25:48,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:25:48,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-07 16:25:48,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854039132] [2021-10-07 16:25:48,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:25:48,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:25:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:25:48,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:25:48,343 INFO L87 Difference]: Start difference. First operand 9564 states and 46967 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:22,068 INFO L93 Difference]: Finished difference Result 15461 states and 70781 transitions. [2021-10-07 16:28:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:28:22,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 16:28:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:22,135 INFO L225 Difference]: With dead ends: 15461 [2021-10-07 16:28:22,135 INFO L226 Difference]: Without dead ends: 15461 [2021-10-07 16:28:22,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 49786.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:28:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15461 states. [2021-10-07 16:28:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15461 to 10533. [2021-10-07 16:28:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10528 states have (on average 4.92154255319149) internal successors, (51814), 10532 states have internal predecessors, (51814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 51814 transitions. [2021-10-07 16:28:22,462 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 51814 transitions. Word has length 20 [2021-10-07 16:28:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:22,462 INFO L470 AbstractCegarLoop]: Abstraction has 10533 states and 51814 transitions. [2021-10-07 16:28:22,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 51814 transitions. [2021-10-07 16:28:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:28:22,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:22,474 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:22,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:22,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:22,682 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:28:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1219378312, now seen corresponding path program 5 times [2021-10-07 16:28:22,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:22,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896383681] [2021-10-07 16:28:22,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:28:22,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:22,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:22,685 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:22,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 16:28:23,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-07 16:28:23,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 16:28:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:23,888 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:28:25,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:33,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:33,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896383681] [2021-10-07 16:28:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896383681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:33,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:33,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2021-10-07 16:28:33,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333882348] [2021-10-07 16:28:33,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 16:28:33,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 16:28:33,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:28:33,012 INFO L87 Difference]: Start difference. First operand 10533 states and 51814 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:30:23,558 INFO L93 Difference]: Finished difference Result 26755 states and 124933 transitions. [2021-10-07 16:30:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-07 16:30:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-10-07 16:30:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:30:23,699 INFO L225 Difference]: With dead ends: 26755 [2021-10-07 16:30:23,699 INFO L226 Difference]: Without dead ends: 26755 [2021-10-07 16:30:23,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 50691.5ms TimeCoverageRelationStatistics Valid=844, Invalid=3986, Unknown=0, NotChecked=0, Total=4830 [2021-10-07 16:30:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-10-07 16:30:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 12249. [2021-10-07 16:30:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12249 states, 12244 states have (on average 4.945769356419471) internal successors, (60556), 12248 states have internal predecessors, (60556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12249 states to 12249 states and 60556 transitions. [2021-10-07 16:30:24,303 INFO L78 Accepts]: Start accepts. Automaton has 12249 states and 60556 transitions. Word has length 20 [2021-10-07 16:30:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:30:24,303 INFO L470 AbstractCegarLoop]: Abstraction has 12249 states and 60556 transitions. [2021-10-07 16:30:24,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12249 states and 60556 transitions. [2021-10-07 16:30:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:30:24,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:30:24,316 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-07 16:30:24,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 16:30:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:30:24,516 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 43 more)] === [2021-10-07 16:30:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:30:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1615919006, now seen corresponding path program 7 times [2021-10-07 16:30:24,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:30:24,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816255017] [2021-10-07 16:30:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:30:24,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:30:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:30:24,662 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:30:24,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 16:30:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:30:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 16:30:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:30:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:25,701 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:30:25,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:30:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:30:27,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:30:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:30:37,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:30:37,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816255017] [2021-10-07 16:30:37,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816255017] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:30:37,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:30:37,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 35 [2021-10-07 16:30:37,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273821783] [2021-10-07 16:30:37,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 16:30:37,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:30:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 16:30:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 16:30:37,562 INFO L87 Difference]: Start difference. First operand 12249 states and 60556 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 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) Received shutdown request... [2021-10-07 16:32:51,825 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:32:51,825 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:32:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-07 16:32:51,931 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:32:51,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 16:32:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:32:52,134 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:32:52,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:32:52,137 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:32:52,138 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:32:52,139 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,140 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:32:52,141 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:32:52,142 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:32:52,142 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err4REQUIRES_VIOLATION [2021-10-07 16:32:52,142 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err5REQUIRES_VIOLATION [2021-10-07 16:32:52,150 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:32:52,150 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:32:52,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:32:52 BasicIcfg [2021-10-07 16:32:52,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:32:52,153 INFO L168 Benchmark]: Toolchain (without parser) took 833052.41 ms. Allocated memory was 160.4 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 134.8 MB in the beginning and 4.7 GB in the end (delta: -4.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,154 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:32:52,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.73 ms. Allocated memory is still 160.4 MB. Free memory was 134.4 MB in the beginning and 120.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.22 ms. Allocated memory is still 160.4 MB. Free memory was 120.9 MB in the beginning and 119.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,155 INFO L168 Benchmark]: Boogie Preprocessor took 47.37 ms. Allocated memory is still 160.4 MB. Free memory was 119.0 MB in the beginning and 117.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,155 INFO L168 Benchmark]: RCFGBuilder took 1383.71 ms. Allocated memory is still 160.4 MB. Free memory was 117.3 MB in the beginning and 122.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,155 INFO L168 Benchmark]: TraceAbstraction took 831166.46 ms. Allocated memory was 160.4 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 122.0 MB in the beginning and 4.7 GB in the end (delta: -4.6 GB). Peak memory consumption was 997.4 MB. Max. memory is 8.0 GB. [2021-10-07 16:32:52,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 384.73 ms. Allocated memory is still 160.4 MB. Free memory was 134.4 MB in the beginning and 120.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.22 ms. Allocated memory is still 160.4 MB. Free memory was 120.9 MB in the beginning and 119.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.37 ms. Allocated memory is still 160.4 MB. Free memory was 119.0 MB in the beginning and 117.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1383.71 ms. Allocated memory is still 160.4 MB. Free memory was 117.3 MB in the beginning and 122.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 831166.46 ms. Allocated memory was 160.4 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 122.0 MB in the beginning and 4.7 GB in the end (delta: -4.6 GB). Peak memory consumption was 997.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28849.9ms, 188 PlacesBefore, 65 PlacesAfterwards, 193 TransitionsBefore, 61 TransitionsAfterwards, 4804 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 19 ConcurrentYvCompositions, 9 ChoiceCompositions, 206 TotalNumberOfCompositions, 7624 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6320, positive: 6247, positive conditional: 0, positive unconditional: 6247, negative: 73, negative conditional: 0, negative unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3116, positive: 3085, positive conditional: 0, positive unconditional: 3085, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3116, positive: 3085, positive conditional: 0, positive unconditional: 3085, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 31, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2183, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2183, negative conditional: 0, negative unconditional: 2183, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6320, positive: 3162, positive conditional: 0, positive unconditional: 3162, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 3116, unknown conditional: 0, unknown unconditional: 3116] , Statistics on independence cache: Total cache size (in pairs): 241, Positive cache size: 236, Positive conditional cache size: 0, Positive unconditional cache size: 236, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5 - 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: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - 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 constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - 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 constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (12249states) and FLOYD_HOARE automaton (currently 75 states, 36 states before enhancement),while ReachableStatesComputation was computing reachable states (13071 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 239 locations, 47 error locations. Started 1 CEGAR loops. OverallTime: 830998.8ms, OverallIterations: 33, TraceHistogramMax: 14, EmptinessCheckTime: 145.6ms, AutomataDifference: 692459.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29053.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1807 SDtfs, 24085 SDslu, 19448 SDs, 0 SdLazy, 31811 SolverSat, 1549 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 398013.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 916 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6039 ImplicationChecksByTransitivity, 310112.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12249occurred in iteration=32, InterpolantAutomatonStates: 433, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9930.1ms AutomataMinimizationTime, 32 MinimizatonAttempts, 238752 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 323.8ms SsaConstructionTime, 3328.3ms SatisfiabilityAnalysisTime, 84131.4ms InterpolantComputationTime, 325 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 584 ConstructedInterpolants, 147 QuantifiedInterpolants, 14337 SizeOfPredicates, 370 NumberOfNonLiveVariables, 2936 ConjunctsInSsa, 516 ConjunctsInUnsatCore, 66 InterpolantComputations, 17 PerfectInterpolantSequences, 338/1094 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