/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:08:41,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:08:41,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:08:41,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 21:08:42,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:08:42,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:08:42,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:08:42,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:08:42,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:08:42,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:08:42,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:08:42,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:08:42,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:08:42,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:08:42,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:08:42,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:08:42,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 21:08:42,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:08:42,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:08:42,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:08:42,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:08:42,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:08:42,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:08:42,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:08:42,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:08:42,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:08:42,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:08:42,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:08:42,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:08:42,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:08:42,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:08:42,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:08:42,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:08:42,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:08:42,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:08:42,091 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:08:42,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:08:42,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:08:42,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:08:42,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:08:42,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:08:42,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:08:42,093 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:08:42,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:08:42,095 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:08:42,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:08:42,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:08:42,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:08:42,096 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:08:42,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:08:42,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:08:42,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:08:42,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:08:42,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:08:42,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:42,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:08:42,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:08:42,098 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:08:42,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:08:42,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:08:42,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:08:42,099 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:08:42,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:08:42,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:08:42,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:08:42,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:08:42,557 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:08:42,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2021-10-13 21:08:42,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97519b95c/32ed5a22443140999d921cbe348198fb/FLAG4755fde57 [2021-10-13 21:08:43,374 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:08:43,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2021-10-13 21:08:43,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97519b95c/32ed5a22443140999d921cbe348198fb/FLAG4755fde57 [2021-10-13 21:08:43,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97519b95c/32ed5a22443140999d921cbe348198fb [2021-10-13 21:08:43,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:08:43,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:08:43,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:43,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:08:43,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:08:43,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:43" (1/1) ... [2021-10-13 21:08:43,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bf63ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43, skipping insertion in model container [2021-10-13 21:08:43,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:43" (1/1) ... [2021-10-13 21:08:43,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:08:43,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:44,093 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2430,2443] [2021-10-13 21:08:44,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:44,147 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:08:44,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:44,208 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2430,2443] [2021-10-13 21:08:44,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:44,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:08:44,263 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2430,2443] [2021-10-13 21:08:44,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:44,290 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:08:44,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44 WrapperNode [2021-10-13 21:08:44,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:44,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:44,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:08:44,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:08:44,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:44,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:08:44,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:08:44,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:08:44,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:08:44,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:08:44,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:08:44,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:08:44,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (1/1) ... [2021-10-13 21:08:44,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:44,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:08:44,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 21:08:44,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 21:08:44,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:08:44,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:08:44,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:08:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:08:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:08:44,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:08:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:08:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:08:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:08:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:08:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:08:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:08:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:08:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:08:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:08:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:08:44,541 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:08:45,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:08:45,796 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 21:08:45,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:45 BoogieIcfgContainer [2021-10-13 21:08:45,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:08:45,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:08:45,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:08:45,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:08:45,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:43" (1/3) ... [2021-10-13 21:08:45,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d6168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:45, skipping insertion in model container [2021-10-13 21:08:45,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:44" (2/3) ... [2021-10-13 21:08:45,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d6168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:45, skipping insertion in model container [2021-10-13 21:08:45,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:45" (3/3) ... [2021-10-13 21:08:45,809 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2021-10-13 21:08:45,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:08:45,816 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-13 21:08:45,816 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:08:45,855 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,856 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,856 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,857 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,857 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,857 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,860 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,862 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,862 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,863 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,864 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,864 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,864 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,865 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,867 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,868 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,868 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,868 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,869 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,870 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,871 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,871 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,871 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,872 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,872 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,873 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,873 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,874 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,874 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,874 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,875 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,875 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,879 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,879 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,879 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,880 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,880 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,880 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,883 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,883 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,883 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,884 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,884 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,884 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,886 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,886 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:45,893 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 21:08:45,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:08:45,961 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 21:08:45,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-10-13 21:08:45,981 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:08:45,995 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 163 transitions, 350 flow [2021-10-13 21:08:45,999 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 163 transitions, 350 flow [2021-10-13 21:08:46,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 163 places, 163 transitions, 350 flow [2021-10-13 21:08:46,076 INFO L129 PetriNetUnfolder]: 10/160 cut-off events. [2021-10-13 21:08:46,077 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 21:08:46,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 160 events. 10/160 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2021-10-13 21:08:46,087 INFO L116 LiptonReduction]: Number of co-enabled transitions 1742 [2021-10-13 21:09:11,331 INFO L131 LiptonReduction]: Checked pairs total: 2687 [2021-10-13 21:09:11,331 INFO L133 LiptonReduction]: Total number of compositions: 172 [2021-10-13 21:09:11,346 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2021-10-13 21:09:11,431 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:11,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:11,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:11,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 20825, now seen corresponding path program 1 times [2021-10-13 21:09:11,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:11,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796338948] [2021-10-13 21:09:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:11,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:11,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:11,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:09:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:09:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:12,109 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:12,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 21:09:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:12,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:12,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:12,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796338948] [2021-10-13 21:09:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796338948] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:12,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:12,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142345500] [2021-10-13 21:09:12,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:12,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:12,331 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:12,581 INFO L93 Difference]: Finished difference Result 383 states and 1118 transitions. [2021-10-13 21:09:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:09:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:09:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:12,603 INFO L225 Difference]: With dead ends: 383 [2021-10-13 21:09:12,603 INFO L226 Difference]: Without dead ends: 383 [2021-10-13 21:09:12,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-10-13 21:09:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2021-10-13 21:09:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 315 states have (on average 3.549206349206349) internal successors, (1118), 379 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1118 transitions. [2021-10-13 21:09:12,691 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1118 transitions. Word has length 2 [2021-10-13 21:09:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:12,692 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1118 transitions. [2021-10-13 21:09:12,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1118 transitions. [2021-10-13 21:09:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:12,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:12,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:12,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:12,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:12,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash 20715, now seen corresponding path program 1 times [2021-10-13 21:09:12,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:12,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114560088] [2021-10-13 21:09:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:12,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:12,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:12,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:09:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:13,006 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:09:13,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:09:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:13,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:13,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:13,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114560088] [2021-10-13 21:09:13,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114560088] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:13,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:13,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:09:13,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140942671] [2021-10-13 21:09:13,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:13,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:13,053 INFO L87 Difference]: Start difference. First operand 380 states and 1118 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:13,184 INFO L93 Difference]: Finished difference Result 378 states and 1114 transitions. [2021-10-13 21:09:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:09:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:13,193 INFO L225 Difference]: With dead ends: 378 [2021-10-13 21:09:13,193 INFO L226 Difference]: Without dead ends: 378 [2021-10-13 21:09:13,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-13 21:09:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-10-13 21:09:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.5365079365079364) internal successors, (1114), 377 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1114 transitions. [2021-10-13 21:09:13,254 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1114 transitions. Word has length 2 [2021-10-13 21:09:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:13,255 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1114 transitions. [2021-10-13 21:09:13,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1114 transitions. [2021-10-13 21:09:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:13,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:13,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:13,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:13,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:13,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash 20816, now seen corresponding path program 1 times [2021-10-13 21:09:13,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:13,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797718681] [2021-10-13 21:09:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:13,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:13,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:13,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:09:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:09:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:13,899 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:13,900 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 [2021-10-13 21:09:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:13,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:14,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:14,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797718681] [2021-10-13 21:09:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797718681] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:14,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:14,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:14,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792329035] [2021-10-13 21:09:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,072 INFO L87 Difference]: Start difference. First operand 378 states and 1114 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:14,230 INFO L93 Difference]: Finished difference Result 377 states and 1112 transitions. [2021-10-13 21:09:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:09:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:14,236 INFO L225 Difference]: With dead ends: 377 [2021-10-13 21:09:14,237 INFO L226 Difference]: Without dead ends: 377 [2021-10-13 21:09:14,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-13 21:09:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-10-13 21:09:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 315 states have (on average 3.53015873015873) internal successors, (1112), 376 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1112 transitions. [2021-10-13 21:09:14,257 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1112 transitions. Word has length 2 [2021-10-13 21:09:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:14,257 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1112 transitions. [2021-10-13 21:09:14,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1112 transitions. [2021-10-13 21:09:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:14,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:14,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:14,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:14,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:14,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash 645351, now seen corresponding path program 1 times [2021-10-13 21:09:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:14,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752322688] [2021-10-13 21:09:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:14,475 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:14,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:09:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:09:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:14,647 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-10-13 21:09:14,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 54 [2021-10-13 21:09:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:14,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:14,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:14,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752322688] [2021-10-13 21:09:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752322688] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:14,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:14,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229437109] [2021-10-13 21:09:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:14,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,823 INFO L87 Difference]: Start difference. First operand 377 states and 1112 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) [2021-10-13 21:09:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:14,958 INFO L93 Difference]: Finished difference Result 326 states and 936 transitions. [2021-10-13 21:09:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:14,959 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 [2021-10-13 21:09:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:14,963 INFO L225 Difference]: With dead ends: 326 [2021-10-13 21:09:14,963 INFO L226 Difference]: Without dead ends: 326 [2021-10-13 21:09:14,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-13 21:09:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-10-13 21:09:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 274 states have (on average 3.4160583941605838) internal successors, (936), 325 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 936 transitions. [2021-10-13 21:09:14,977 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 936 transitions. Word has length 3 [2021-10-13 21:09:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:14,977 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 936 transitions. [2021-10-13 21:09:14,977 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) [2021-10-13 21:09:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 936 transitions. [2021-10-13 21:09:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:14,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:14,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:14,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:15,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:15,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 645352, now seen corresponding path program 1 times [2021-10-13 21:09:15,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:15,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114415188] [2021-10-13 21:09:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:15,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:15,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:15,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:15,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:09:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:09:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:15,587 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:15,588 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 49 treesize of output 99 [2021-10-13 21:09:15,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 21:09:15,601 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 102 treesize of output 98 [2021-10-13 21:09:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:17,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:17,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:17,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114415188] [2021-10-13 21:09:17,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114415188] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:09:17,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:09:17,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-13 21:09:17,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939517871] [2021-10-13 21:09:17,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:17,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:17,339 INFO L87 Difference]: Start difference. First operand 326 states and 936 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) [2021-10-13 21:09:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:17,468 INFO L93 Difference]: Finished difference Result 275 states and 760 transitions. [2021-10-13 21:09:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:17,474 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 [2021-10-13 21:09:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:17,477 INFO L225 Difference]: With dead ends: 275 [2021-10-13 21:09:17,477 INFO L226 Difference]: Without dead ends: 275 [2021-10-13 21:09:17,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-13 21:09:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-10-13 21:09:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 233 states have (on average 3.2618025751072963) internal successors, (760), 274 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 760 transitions. [2021-10-13 21:09:17,490 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 760 transitions. Word has length 3 [2021-10-13 21:09:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:17,490 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 760 transitions. [2021-10-13 21:09:17,490 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) [2021-10-13 21:09:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 760 transitions. [2021-10-13 21:09:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:17,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:17,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:17,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:17,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:17,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 645242, now seen corresponding path program 1 times [2021-10-13 21:09:17,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:17,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900630839] [2021-10-13 21:09:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:17,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:17,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:17,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:17,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:09:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:18,028 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:18,029 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 [2021-10-13 21:09:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:18,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:18,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:18,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900630839] [2021-10-13 21:09:18,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900630839] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:18,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:18,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-13 21:09:18,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32736255] [2021-10-13 21:09:18,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:09:18,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:09:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:18,372 INFO L87 Difference]: Start difference. First operand 275 states and 760 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:18,957 INFO L93 Difference]: Finished difference Result 549 states and 1521 transitions. [2021-10-13 21:09:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 21:09:18,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 21:09:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:18,964 INFO L225 Difference]: With dead ends: 549 [2021-10-13 21:09:18,965 INFO L226 Difference]: Without dead ends: 549 [2021-10-13 21:09:18,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:09:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-10-13 21:09:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 278. [2021-10-13 21:09:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 236 states have (on average 3.2457627118644066) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2021-10-13 21:09:18,979 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 3 [2021-10-13 21:09:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:18,979 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2021-10-13 21:09:18,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2021-10-13 21:09:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:09:18,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:18,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:09:18,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:19,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:19,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash 620198586, now seen corresponding path program 1 times [2021-10-13 21:09:19,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:19,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844991258] [2021-10-13 21:09:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:19,196 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:19,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:19,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:09:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:09:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:19,604 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:19,604 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 [2021-10-13 21:09:19,623 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 [2021-10-13 21:09:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:22,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:22,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:22,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844991258] [2021-10-13 21:09:22,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844991258] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:22,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:22,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:22,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162297805] [2021-10-13 21:09:22,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:22,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:22,272 INFO L87 Difference]: Start difference. First operand 278 states and 766 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:22,933 INFO L93 Difference]: Finished difference Result 519 states and 1451 transitions. [2021-10-13 21:09:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 21:09:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:22,939 INFO L225 Difference]: With dead ends: 519 [2021-10-13 21:09:22,939 INFO L226 Difference]: Without dead ends: 519 [2021-10-13 21:09:22,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-10-13 21:09:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 263. [2021-10-13 21:09:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 227 states have (on average 3.2202643171806167) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2021-10-13 21:09:22,952 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2021-10-13 21:09:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:22,953 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2021-10-13 21:09:22,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2021-10-13 21:09:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:09:22,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:22,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:09:22,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:23,171 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 620198587, now seen corresponding path program 1 times [2021-10-13 21:09:23,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:23,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693888135] [2021-10-13 21:09:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:23,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:23,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:23,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:09:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:09:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:23,357 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:09:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-13 21:09:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:23,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:23,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:23,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693888135] [2021-10-13 21:09:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693888135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:23,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:23,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872021253] [2021-10-13 21:09:23,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:23,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:23,583 INFO L87 Difference]: Start difference. First operand 263 states and 731 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) [2021-10-13 21:09:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:23,663 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2021-10-13 21:09:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:23,664 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 [2021-10-13 21:09:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:23,666 INFO L225 Difference]: With dead ends: 248 [2021-10-13 21:09:23,666 INFO L226 Difference]: Without dead ends: 248 [2021-10-13 21:09:23,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-13 21:09:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-10-13 21:09:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 218 states have (on average 3.1926605504587156) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2021-10-13 21:09:23,676 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2021-10-13 21:09:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2021-10-13 21:09:23,677 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) [2021-10-13 21:09:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2021-10-13 21:09:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:23,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:23,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:23,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:23,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:23,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2046281947, now seen corresponding path program 1 times [2021-10-13 21:09:23,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:23,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296691978] [2021-10-13 21:09:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:23,898 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:23,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:23,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:23,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:09:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:24,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:24,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:24,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296691978] [2021-10-13 21:09:24,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296691978] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:24,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:09:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874686049] [2021-10-13 21:09:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:24,042 INFO L87 Difference]: Start difference. First operand 248 states and 696 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2021-10-13 21:09:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:24,124 INFO L93 Difference]: Finished difference Result 170 states and 466 transitions. [2021-10-13 21:09:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2021-10-13 21:09:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:24,128 INFO L225 Difference]: With dead ends: 170 [2021-10-13 21:09:24,128 INFO L226 Difference]: Without dead ends: 170 [2021-10-13 21:09:24,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-13 21:09:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-13 21:09:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 155 states have (on average 3.0064516129032257) internal successors, (466), 169 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 466 transitions. [2021-10-13 21:09:24,140 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 466 transitions. Word has length 6 [2021-10-13 21:09:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 466 transitions. [2021-10-13 21:09:24,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2021-10-13 21:09:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 466 transitions. [2021-10-13 21:09:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:24,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:24,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:24,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:24,355 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2046281948, now seen corresponding path program 1 times [2021-10-13 21:09:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:24,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402693150] [2021-10-13 21:09:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:24,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:24,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:24,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:09:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:09:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-13 21:09:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:24,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:24,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402693150] [2021-10-13 21:09:24,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402693150] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:24,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:24,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:09:24,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194106948] [2021-10-13 21:09:24,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:24,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:24,714 INFO L87 Difference]: Start difference. First operand 170 states and 466 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:25,056 INFO L93 Difference]: Finished difference Result 264 states and 720 transitions. [2021-10-13 21:09:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:25,061 INFO L225 Difference]: With dead ends: 264 [2021-10-13 21:09:25,061 INFO L226 Difference]: Without dead ends: 264 [2021-10-13 21:09:25,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-13 21:09:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 204. [2021-10-13 21:09:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 189 states have (on average 3.1746031746031744) internal successors, (600), 203 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 600 transitions. [2021-10-13 21:09:25,072 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 600 transitions. Word has length 6 [2021-10-13 21:09:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 600 transitions. [2021-10-13 21:09:25,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 600 transitions. [2021-10-13 21:09:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:25,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:25,078 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1] [2021-10-13 21:09:25,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:25,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2045559916, now seen corresponding path program 2 times [2021-10-13 21:09:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:25,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413986998] [2021-10-13 21:09:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:09:25,298 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:25,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:25,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:09:25,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:09:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:09:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:09:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:25,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:25,726 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:25,727 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 [2021-10-13 21:09:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:25,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:27,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:27,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413986998] [2021-10-13 21:09:27,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413986998] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:27,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:27,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 21:09:27,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901351760] [2021-10-13 21:09:27,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:09:27,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:09:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:09:27,043 INFO L87 Difference]: Start difference. First operand 204 states and 600 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:31,453 INFO L93 Difference]: Finished difference Result 1589 states and 4735 transitions. [2021-10-13 21:09:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:09:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:31,469 INFO L225 Difference]: With dead ends: 1589 [2021-10-13 21:09:31,470 INFO L226 Difference]: Without dead ends: 1589 [2021-10-13 21:09:31,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2861.9ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:09:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-10-13 21:09:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 210. [2021-10-13 21:09:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 209 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 612 transitions. [2021-10-13 21:09:31,495 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 612 transitions. Word has length 6 [2021-10-13 21:09:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:31,495 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 612 transitions. [2021-10-13 21:09:31,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 612 transitions. [2021-10-13 21:09:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:31,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:31,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:31,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:31,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:31,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash -989766367, now seen corresponding path program 1 times [2021-10-13 21:09:31,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:31,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212724823] [2021-10-13 21:09:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:31,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:31,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:31,713 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:31,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:09:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:09:31,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:32,165 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:32,165 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 [2021-10-13 21:09:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:32,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:32,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:32,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212724823] [2021-10-13 21:09:32,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212724823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:32,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:09:32,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090686517] [2021-10-13 21:09:32,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:09:32,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:09:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:32,919 INFO L87 Difference]: Start difference. First operand 210 states and 612 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) [2021-10-13 21:09:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:34,314 INFO L93 Difference]: Finished difference Result 372 states and 1100 transitions. [2021-10-13 21:09:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:34,315 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 [2021-10-13 21:09:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:34,320 INFO L225 Difference]: With dead ends: 372 [2021-10-13 21:09:34,320 INFO L226 Difference]: Without dead ends: 372 [2021-10-13 21:09:34,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:09:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-10-13 21:09:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 312. [2021-10-13 21:09:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 297 states have (on average 3.2996632996632997) internal successors, (980), 311 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 980 transitions. [2021-10-13 21:09:34,333 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 980 transitions. Word has length 7 [2021-10-13 21:09:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:34,333 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 980 transitions. [2021-10-13 21:09:34,333 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) [2021-10-13 21:09:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 980 transitions. [2021-10-13 21:09:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:34,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:34,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:34,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:34,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash -989599662, now seen corresponding path program 1 times [2021-10-13 21:09:34,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:34,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560551780] [2021-10-13 21:09:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:34,551 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:34,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:34,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:09:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:34,772 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:09:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:09:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:34,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:34,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:34,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560551780] [2021-10-13 21:09:34,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560551780] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:34,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:34,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:09:34,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563110116] [2021-10-13 21:09:34,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:34,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:34,840 INFO L87 Difference]: Start difference. First operand 312 states and 980 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) [2021-10-13 21:09:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:34,914 INFO L93 Difference]: Finished difference Result 278 states and 869 transitions. [2021-10-13 21:09:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:34,915 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 [2021-10-13 21:09:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:34,917 INFO L225 Difference]: With dead ends: 278 [2021-10-13 21:09:34,917 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 21:09:34,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 21:09:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-13 21:09:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 268 states have (on average 3.2425373134328357) internal successors, (869), 277 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 869 transitions. [2021-10-13 21:09:34,928 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 869 transitions. Word has length 7 [2021-10-13 21:09:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:34,929 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 869 transitions. [2021-10-13 21:09:34,929 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) [2021-10-13 21:09:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 869 transitions. [2021-10-13 21:09:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:34,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:34,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:34,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 21:09:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:35,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash -989599661, now seen corresponding path program 1 times [2021-10-13 21:09:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:35,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867284380] [2021-10-13 21:09:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:35,145 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:35,146 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:35,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:09:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:35,583 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:35,584 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 [2021-10-13 21:09:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:35,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:36,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:36,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867284380] [2021-10-13 21:09:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867284380] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:36,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:36,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249824656] [2021-10-13 21:09:36,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:36,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:36,138 INFO L87 Difference]: Start difference. First operand 278 states and 869 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:36,405 INFO L93 Difference]: Finished difference Result 475 states and 1493 transitions. [2021-10-13 21:09:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:09:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:36,410 INFO L225 Difference]: With dead ends: 475 [2021-10-13 21:09:36,410 INFO L226 Difference]: Without dead ends: 475 [2021-10-13 21:09:36,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-10-13 21:09:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 244. [2021-10-13 21:09:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 3.1715481171548117) internal successors, (758), 243 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 758 transitions. [2021-10-13 21:09:36,422 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 758 transitions. Word has length 7 [2021-10-13 21:09:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:36,423 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 758 transitions. [2021-10-13 21:09:36,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 758 transitions. [2021-10-13 21:09:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:09:36,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:36,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:36,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:36,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:36,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash -612823258, now seen corresponding path program 1 times [2021-10-13 21:09:36,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:36,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309902592] [2021-10-13 21:09:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:36,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:36,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:36,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:36,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:09:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:09:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:37,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-13 21:09:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:37,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:37,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309902592] [2021-10-13 21:09:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309902592] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:37,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:09:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246318715] [2021-10-13 21:09:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:37,071 INFO L87 Difference]: Start difference. First operand 244 states and 758 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:37,343 INFO L93 Difference]: Finished difference Result 354 states and 1110 transitions. [2021-10-13 21:09:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:09:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:37,348 INFO L225 Difference]: With dead ends: 354 [2021-10-13 21:09:37,348 INFO L226 Difference]: Without dead ends: 354 [2021-10-13 21:09:37,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-13 21:09:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 296. [2021-10-13 21:09:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 3.374570446735395) internal successors, (982), 295 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 982 transitions. [2021-10-13 21:09:37,367 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 982 transitions. Word has length 8 [2021-10-13 21:09:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 982 transitions. [2021-10-13 21:09:37,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 982 transitions. [2021-10-13 21:09:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:09:37,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:37,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:37,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,584 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1817648221, now seen corresponding path program 1 times [2021-10-13 21:09:37,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:37,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080244284] [2021-10-13 21:09:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:37,585 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:37,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:37,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:09:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:09:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:37,980 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:37,981 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 [2021-10-13 21:09:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:38,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:38,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:38,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080244284] [2021-10-13 21:09:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080244284] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:38,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:38,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:09:38,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836885583] [2021-10-13 21:09:38,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:09:38,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:09:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:38,740 INFO L87 Difference]: Start difference. First operand 296 states and 982 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) [2021-10-13 21:09:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:39,747 INFO L93 Difference]: Finished difference Result 510 states and 1730 transitions. [2021-10-13 21:09:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:39,748 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 [2021-10-13 21:09:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:39,752 INFO L225 Difference]: With dead ends: 510 [2021-10-13 21:09:39,752 INFO L226 Difference]: Without dead ends: 510 [2021-10-13 21:09:39,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 854.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:09:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-13 21:09:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 452. [2021-10-13 21:09:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 447 states have (on average 3.5838926174496644) internal successors, (1602), 451 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1602 transitions. [2021-10-13 21:09:39,771 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1602 transitions. Word has length 9 [2021-10-13 21:09:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1602 transitions. [2021-10-13 21:09:39,771 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) [2021-10-13 21:09:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1602 transitions. [2021-10-13 21:09:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:09:39,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:39,773 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:39,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:39,986 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1176686052, now seen corresponding path program 2 times [2021-10-13 21:09:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:39,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559254438] [2021-10-13 21:09:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:09:39,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:39,990 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:09:40,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:09:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:09:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:09:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:40,434 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:40,435 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 [2021-10-13 21:09:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:40,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:42,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:42,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559254438] [2021-10-13 21:09:42,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559254438] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:42,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:42,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 21:09:42,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678184011] [2021-10-13 21:09:42,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:09:42,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:09:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:09:42,213 INFO L87 Difference]: Start difference. First operand 452 states and 1602 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:50,736 INFO L93 Difference]: Finished difference Result 1444 states and 4760 transitions. [2021-10-13 21:09:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 21:09:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:09:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:50,751 INFO L225 Difference]: With dead ends: 1444 [2021-10-13 21:09:50,751 INFO L226 Difference]: Without dead ends: 1444 [2021-10-13 21:09:50,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5208.4ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:09:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-10-13 21:09:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 754. [2021-10-13 21:09:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 3.5380507343124163) internal successors, (2650), 753 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2650 transitions. [2021-10-13 21:09:50,792 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2650 transitions. Word has length 10 [2021-10-13 21:09:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:50,792 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2650 transitions. [2021-10-13 21:09:50,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2650 transitions. [2021-10-13 21:09:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:09:50,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:50,795 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:50,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:51,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:51,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:09:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1393084006, now seen corresponding path program 2 times [2021-10-13 21:09:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:51,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218623083] [2021-10-13 21:09:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:09:51,011 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:51,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:51,013 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:51,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:09:51,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:09:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:09:51,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 21:09:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:51,574 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:09:51,574 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 [2021-10-13 21:09:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:52,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:53,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:53,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218623083] [2021-10-13 21:09:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218623083] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:53,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 21:09:53,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402070565] [2021-10-13 21:09:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:09:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:09:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:09:53,399 INFO L87 Difference]: Start difference. First operand 754 states and 2650 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:02,415 INFO L93 Difference]: Finished difference Result 1318 states and 4388 transitions. [2021-10-13 21:10:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 21:10:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:10:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:02,426 INFO L225 Difference]: With dead ends: 1318 [2021-10-13 21:10:02,427 INFO L226 Difference]: Without dead ends: 1318 [2021-10-13 21:10:02,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4835.0ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-10-13 21:10:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-10-13 21:10:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 864. [2021-10-13 21:10:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 3.4761350407450524) internal successors, (2986), 863 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2986 transitions. [2021-10-13 21:10:02,472 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2986 transitions. Word has length 12 [2021-10-13 21:10:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2986 transitions. [2021-10-13 21:10:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2986 transitions. [2021-10-13 21:10:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:10:02,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:02,474 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2021-10-13 21:10:02,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:02,690 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:10:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1220266989, now seen corresponding path program 3 times [2021-10-13 21:10:02,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:02,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309956061] [2021-10-13 21:10:02,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:10:02,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:02,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:02,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:10:03,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 21:10:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:10:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:03,471 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:03,472 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 [2021-10-13 21:10:03,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 21:10:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:10:03,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 21:10:04,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:04,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309956061] [2021-10-13 21:10:04,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309956061] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:04,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:04,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 21:10:04,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116505601] [2021-10-13 21:10:04,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:10:04,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:10:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:10:04,116 INFO L87 Difference]: Start difference. First operand 864 states and 2986 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:06,106 INFO L93 Difference]: Finished difference Result 1203 states and 4015 transitions. [2021-10-13 21:10:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 21:10:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:10:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:06,116 INFO L225 Difference]: With dead ends: 1203 [2021-10-13 21:10:06,116 INFO L226 Difference]: Without dead ends: 1203 [2021-10-13 21:10:06,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 770.1ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:10:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-13 21:10:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1077. [2021-10-13 21:10:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1072 states have (on average 3.47294776119403) internal successors, (3723), 1076 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 3723 transitions. [2021-10-13 21:10:06,174 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 3723 transitions. Word has length 12 [2021-10-13 21:10:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:06,174 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 3723 transitions. [2021-10-13 21:10:06,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 3723 transitions. [2021-10-13 21:10:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 21:10:06,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:06,176 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1] [2021-10-13 21:10:06,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 21:10:06,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:06,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:10:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -361322068, now seen corresponding path program 3 times [2021-10-13 21:10:06,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:06,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640845142] [2021-10-13 21:10:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:10:06,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:06,395 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:06,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 21:10:06,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 21:10:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:06,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:10:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:07,110 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 21:10:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:07,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:11,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:11,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640845142] [2021-10-13 21:10:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640845142] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:11,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:11,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:10:11,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512653032] [2021-10-13 21:10:11,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:10:11,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:10:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:10:11,470 INFO L87 Difference]: Start difference. First operand 1077 states and 3723 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:18,502 WARN L207 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 125 [2021-10-13 21:10:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:36,935 INFO L93 Difference]: Finished difference Result 8485 states and 30247 transitions. [2021-10-13 21:10:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:10:36,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 21:10:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:37,000 INFO L225 Difference]: With dead ends: 8485 [2021-10-13 21:10:37,000 INFO L226 Difference]: Without dead ends: 8485 [2021-10-13 21:10:37,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 22115.7ms TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:10:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8485 states. [2021-10-13 21:10:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8485 to 1089. [2021-10-13 21:10:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1084 states have (on average 3.456642066420664) internal successors, (3747), 1088 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3747 transitions. [2021-10-13 21:10:37,124 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3747 transitions. Word has length 12 [2021-10-13 21:10:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:37,125 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 3747 transitions. [2021-10-13 21:10:37,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3747 transitions. [2021-10-13 21:10:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:10:37,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:37,127 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2021-10-13 21:10:37,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:37,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:37,341 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:10:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash 824975905, now seen corresponding path program 4 times [2021-10-13 21:10:37,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:37,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537346989] [2021-10-13 21:10:37,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:10:37,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:37,345 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:37,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 21:10:37,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:10:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 21:10:37,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:37,824 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:37,824 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 [2021-10-13 21:10:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:10:38,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:40,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:40,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537346989] [2021-10-13 21:10:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537346989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:40,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-13 21:10:40,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380662205] [2021-10-13 21:10:40,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 21:10:40,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 21:10:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:10:40,835 INFO L87 Difference]: Start difference. First operand 1089 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:45,653 INFO L93 Difference]: Finished difference Result 1585 states and 5071 transitions. [2021-10-13 21:10:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 21:10:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:10:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:45,663 INFO L225 Difference]: With dead ends: 1585 [2021-10-13 21:10:45,663 INFO L226 Difference]: Without dead ends: 1585 [2021-10-13 21:10:45,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4165.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 21:10:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-10-13 21:10:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1045. [2021-10-13 21:10:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1040 states have (on average 3.4548076923076922) internal successors, (3593), 1044 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3593 transitions. [2021-10-13 21:10:45,709 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3593 transitions. Word has length 13 [2021-10-13 21:10:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:45,711 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3593 transitions. [2021-10-13 21:10:45,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3593 transitions. [2021-10-13 21:10:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:10:45,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:45,713 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2021-10-13 21:10:45,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:45,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:45,924 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:10:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1530375702, now seen corresponding path program 5 times [2021-10-13 21:10:45,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:45,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332356433] [2021-10-13 21:10:45,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 21:10:45,926 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:45,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:45,927 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:45,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 21:10:46,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 21:10:46,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:10:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:46,471 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:10:46,472 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 [2021-10-13 21:10:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:47,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:50,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:50,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332356433] [2021-10-13 21:10:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332356433] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:50,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:50,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-13 21:10:50,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070619809] [2021-10-13 21:10:50,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:10:50,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:10:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:10:50,214 INFO L87 Difference]: Start difference. First operand 1045 states and 3593 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:14,119 INFO L93 Difference]: Finished difference Result 1877 states and 6103 transitions. [2021-10-13 21:11:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 21:11:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:11:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:14,130 INFO L225 Difference]: With dead ends: 1877 [2021-10-13 21:11:14,131 INFO L226 Difference]: Without dead ends: 1877 [2021-10-13 21:11:14,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 14750.5ms TimeCoverageRelationStatistics Valid=522, Invalid=2234, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 21:11:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-10-13 21:11:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1345. [2021-10-13 21:11:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1340 states have (on average 3.5365671641791043) internal successors, (4739), 1344 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4739 transitions. [2021-10-13 21:11:14,182 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4739 transitions. Word has length 13 [2021-10-13 21:11:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:14,182 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4739 transitions. [2021-10-13 21:11:14,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4739 transitions. [2021-10-13 21:11:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:11:14,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:14,185 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:11:14,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 21:11:14,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:11:14,399 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:11:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash -786044907, now seen corresponding path program 3 times [2021-10-13 21:11:14,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:14,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092691506] [2021-10-13 21:11:14,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:11:14,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:14,402 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:11:14,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 21:11:14,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 21:11:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:14,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:11:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:15,078 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:15,078 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 [2021-10-13 21:11:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:15,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:17,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092691506] [2021-10-13 21:11:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092691506] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:17,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:17,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-13 21:11:17,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011775130] [2021-10-13 21:11:17,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 21:11:17,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 21:11:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-13 21:11:17,289 INFO L87 Difference]: Start difference. First operand 1345 states and 4739 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:28,572 INFO L93 Difference]: Finished difference Result 2512 states and 8106 transitions. [2021-10-13 21:11:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 21:11:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 21:11:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:28,601 INFO L225 Difference]: With dead ends: 2512 [2021-10-13 21:11:28,601 INFO L226 Difference]: Without dead ends: 2512 [2021-10-13 21:11:28,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4521.6ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:11:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-10-13 21:11:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1814. [2021-10-13 21:11:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1809 states have (on average 3.5986733001658373) internal successors, (6510), 1813 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 6510 transitions. [2021-10-13 21:11:28,671 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 6510 transitions. Word has length 14 [2021-10-13 21:11:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:28,671 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 6510 transitions. [2021-10-13 21:11:28,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 6510 transitions. [2021-10-13 21:11:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 21:11:28,674 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:28,674 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:11:28,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 21:11:28,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:11:28,890 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:11:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 799746740, now seen corresponding path program 4 times [2021-10-13 21:11:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:28,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100171863] [2021-10-13 21:11:28,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 21:11:28,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:28,893 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:11:28,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 21:11:29,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 21:11:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:11:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:29,432 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:29,433 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 [2021-10-13 21:11:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:11:29,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 21:11:31,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100171863] [2021-10-13 21:11:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100171863] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:11:31,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050749305] [2021-10-13 21:11:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:11:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:11:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:11:31,314 INFO L87 Difference]: Start difference. First operand 1814 states and 6510 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) [2021-10-13 21:11:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:39,033 INFO L93 Difference]: Finished difference Result 3256 states and 10888 transitions. [2021-10-13 21:11:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 21:11:39,034 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 [2021-10-13 21:11:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:39,042 INFO L225 Difference]: With dead ends: 3256 [2021-10-13 21:11:39,042 INFO L226 Difference]: Without dead ends: 3256 [2021-10-13 21:11:39,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7121.0ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-10-13 21:11:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-10-13 21:11:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2280. [2021-10-13 21:11:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2275 states have (on average 3.768791208791209) internal successors, (8574), 2279 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8574 transitions. [2021-10-13 21:11:39,193 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8574 transitions. Word has length 15 [2021-10-13 21:11:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 8574 transitions. [2021-10-13 21:11:39,194 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) [2021-10-13 21:11:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8574 transitions. [2021-10-13 21:11:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 21:11:39,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:39,199 INFO L512 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2021-10-13 21:11:39,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 21:11:39,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:11:39,408 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:11:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1602784950, now seen corresponding path program 6 times [2021-10-13 21:11:39,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:39,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416103167] [2021-10-13 21:11:39,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 21:11:39,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:39,413 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:11:39,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 21:11:40,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-13 21:11:40,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 21:11:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:11:40,345 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:11:40,345 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 [2021-10-13 21:11:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:41,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:46,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:46,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416103167] [2021-10-13 21:11:46,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416103167] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:46,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:46,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 21:11:46,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952215393] [2021-10-13 21:11:46,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 21:11:46,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:46,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 21:11:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 21:11:46,191 INFO L87 Difference]: Start difference. First operand 2280 states and 8574 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:15,016 INFO L93 Difference]: Finished difference Result 4883 states and 16853 transitions. [2021-10-13 21:12:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 21:12:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 21:12:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:15,031 INFO L225 Difference]: With dead ends: 4883 [2021-10-13 21:12:15,031 INFO L226 Difference]: Without dead ends: 4883 [2021-10-13 21:12:15,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 17220.7ms TimeCoverageRelationStatistics Valid=1051, Invalid=4205, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 21:12:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-10-13 21:12:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 2487. [2021-10-13 21:12:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2482 states have (on average 3.693392425463336) internal successors, (9167), 2486 states have internal predecessors, (9167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 9167 transitions. [2021-10-13 21:12:15,135 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 9167 transitions. Word has length 19 [2021-10-13 21:12:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:15,135 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 9167 transitions. [2021-10-13 21:12:15,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 9167 transitions. [2021-10-13 21:12:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:12:15,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:15,140 INFO L512 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2021-10-13 21:12:15,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 21:12:15,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:12:15,355 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:12:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:15,355 INFO L82 PathProgramCache]: Analyzing trace with hash -867253631, now seen corresponding path program 7 times [2021-10-13 21:12:15,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:15,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420189825] [2021-10-13 21:12:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 21:12:15,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:15,358 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:12:15,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 21:12:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:12:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 21:12:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:15,936 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-13 21:12:15,937 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 [2021-10-13 21:12:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 21:12:17,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:12:23,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:23,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420189825] [2021-10-13 21:12:23,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420189825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:23,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:23,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 35 [2021-10-13 21:12:23,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778049014] [2021-10-13 21:12:23,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 21:12:23,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 21:12:23,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 21:12:23,775 INFO L87 Difference]: Start difference. First operand 2487 states and 9167 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) [2021-10-13 21:13:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:13:01,141 INFO L93 Difference]: Finished difference Result 6605 states and 22947 transitions. [2021-10-13 21:13:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 21:13:01,144 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 21 [2021-10-13 21:13:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:13:01,164 INFO L225 Difference]: With dead ends: 6605 [2021-10-13 21:13:01,164 INFO L226 Difference]: Without dead ends: 6605 [2021-10-13 21:13:01,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 22182.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=5316, Unknown=0, NotChecked=0, Total=6320 [2021-10-13 21:13:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-10-13 21:13:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 3595. [2021-10-13 21:13:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3590 states have (on average 3.7161559888579387) internal successors, (13341), 3594 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 13341 transitions. [2021-10-13 21:13:01,295 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 13341 transitions. Word has length 21 [2021-10-13 21:13:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:13:01,296 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 13341 transitions. [2021-10-13 21:13:01,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-10-13 21:13:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 13341 transitions. [2021-10-13 21:13:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 21:13:01,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:13:01,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:13:01,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 21:13:01,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:13:01,517 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 35 more)] === [2021-10-13 21:13:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:13:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1637149272, now seen corresponding path program 1 times [2021-10-13 21:13:01,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:13:01,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923473243] [2021-10-13 21:13:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:13:01,519 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:13:01,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:13:01,520 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:13:01,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 21:13:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:13:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:13:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:13:01,869 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 21:13:01,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-13 21:13:01,922 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:13:01,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 65 [2021-10-13 21:13:02,331 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:13:02,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 108 [2021-10-13 21:13:02,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:13:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923473243] [2021-10-13 21:13:02,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_15 [2021-10-13 21:13:02,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901402431] [2021-10-13 21:13:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:13:02,680 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 21:13:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 [2021-10-13 21:13:02,682 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 21:13:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-13 21:13:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:13:03,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:13:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:13:03,461 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-13 21:13:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-10-13 21:13:03,514 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:13:03,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 65 [2021-10-13 21:13:03,920 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-10-13 21:13:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 108 [2021-10-13 21:13:04,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_15 [2021-10-13 21:13:04,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392145983] [2021-10-13 21:13:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:13:04,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 21:13:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:13:04,338 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 21:13:04,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 21:13:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:13:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:13:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:13:05,044 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 22 treesize of output 20 [2021-10-13 21:13:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:05,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2021-10-13 21:13:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:08,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:08,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:08,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:09,002 INFO L354 Elim1Store]: treesize reduction 923, result has 6.4 percent of original size [2021-10-13 21:13:09,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 129 treesize of output 111 [2021-10-13 21:13:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:16:20,072 WARN L207 SmtUtils]: Spent 3.11 m on a formula simplification. DAG size of input: 347 DAG size of output: 126 [2021-10-13 21:16:20,074 INFO L354 Elim1Store]: treesize reduction 1645, result has 21.1 percent of original size [2021-10-13 21:16:20,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 161 treesize of output 513 Received shutdown request... [2021-10-13 21:23:00,419 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:23:00,420 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:23:00,420 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:23:00,442 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:23:01,053 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-13 21:23:01,055 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:23:01,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:01,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:01,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 21:23:01,621 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 21:23:01,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:23:01,658 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. [2021-10-13 21:23:01,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:23:01,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:23:01,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:23:01,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:23:01,660 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:23:01,661 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:23:01,662 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:23:01,663 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:23:01,663 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:23:01,664 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:23:01,665 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:23:01,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 21:23:01,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 21:23:01,677 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:23:01,677 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:23:01,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2021-10-13 21:23:01,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:23:01 BasicIcfg [2021-10-13 21:23:01,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:23:01,684 INFO L168 Benchmark]: Toolchain (without parser) took 857932.05 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 136.0 MB in the beginning and 77.2 MB in the end (delta: 58.7 MB). Peak memory consumption was 165.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,685 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 160.4 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 104.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:23:01,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.63 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 122.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.10 ms. Allocated memory is still 160.4 MB. Free memory was 122.2 MB in the beginning and 120.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,686 INFO L168 Benchmark]: Boogie Preprocessor took 48.06 ms. Allocated memory is still 160.4 MB. Free memory was 120.4 MB in the beginning and 118.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,686 INFO L168 Benchmark]: RCFGBuilder took 1399.82 ms. Allocated memory is still 160.4 MB. Free memory was 118.7 MB in the beginning and 125.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,691 INFO L168 Benchmark]: TraceAbstraction took 855882.46 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 125.2 MB in the beginning and 77.2 MB in the end (delta: 48.0 MB). Peak memory consumption was 155.2 MB. Max. memory is 8.0 GB. [2021-10-13 21:23:01,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 160.4 MB. Free memory was 131.6 MB in the beginning and 131.5 MB in the end (delta: 104.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 522.63 ms. Allocated memory is still 160.4 MB. Free memory was 135.7 MB in the beginning and 122.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.10 ms. Allocated memory is still 160.4 MB. Free memory was 122.2 MB in the beginning and 120.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.06 ms. Allocated memory is still 160.4 MB. Free memory was 120.4 MB in the beginning and 118.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1399.82 ms. Allocated memory is still 160.4 MB. Free memory was 118.7 MB in the beginning and 125.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 855882.46 ms. Allocated memory was 160.4 MB in the beginning and 209.7 MB in the end (delta: 49.3 MB). Free memory was 125.2 MB in the beginning and 77.2 MB in the end (delta: 48.0 MB). Peak memory consumption was 155.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 25332.2ms, 163 PlacesBefore, 60 PlacesAfterwards, 163 TransitionsBefore, 53 TransitionsAfterwards, 1742 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 172 TotalNumberOfCompositions, 2687 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2342, positive: 2303, positive conditional: 0, positive unconditional: 2303, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 976, positive: 963, positive conditional: 0, positive unconditional: 963, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 976, positive: 963, positive conditional: 0, positive unconditional: 963, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 792, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 792, negative conditional: 0, negative unconditional: 792, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2342, positive: 1340, positive conditional: 0, positive unconditional: 1340, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 976, unknown conditional: 0, unknown unconditional: 976] , Statistics on independence cache: Total cache size (in pairs): 119, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - 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: 96]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 187 locations, 39 error locations. Started 1 CEGAR loops. OverallTime: 855720.4ms, OverallIterations: 27, TraceHistogramMax: 11, EmptinessCheckTime: 54.1ms, AutomataDifference: 169272.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25469.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1237 SDtfs, 12474 SDslu, 11916 SDs, 0 SdLazy, 15087 SolverSat, 829 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81059.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 610 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3813 ImplicationChecksByTransitivity, 109440.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3595occurred in iteration=26, InterpolantAutomatonStates: 348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1131.2ms AutomataMinimizationTime, 26 MinimizatonAttempts, 19194 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 233.3ms SsaConstructionTime, 2695.4ms SatisfiabilityAnalysisTime, 48805.9ms InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 392 ConstructedInterpolants, 55 QuantifiedInterpolants, 8404 SizeOfPredicates, 238 NumberOfNonLiveVariables, 2210 ConjunctsInSsa, 361 ConjunctsInUnsatCore, 52 InterpolantComputations, 19 PerfectInterpolantSequences, 132/688 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