/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/bench-exp3x3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:20:57,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:20:57,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:20:57,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 15:20:57,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 15:20:57,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 15:20:57,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 15:20:57,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 15:20:57,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 15:20:57,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 15:20:57,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 15:20:57,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 15:20:57,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:20:57,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:20:57,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:20:57,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:20:57,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:20:57,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:20:57,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:20:57,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:20:57,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:20:57,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:20:57,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:20:57,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:20:57,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 15:20:57,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 15:20:57,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 15:20:57,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 15:20:57,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 15:20:57,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 15:20:57,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 15:20:57,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 15:20:57,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 15:20:57,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:20:57,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:20:57,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:20:57,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 15:20:57,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:20:57,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:20:57,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:20:57,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:20:57,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:20:57,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:20:57,400 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:20:57,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:20:57,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:20:57,401 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:20:57,402 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:20:57,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:20:57,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:20:57,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:20:57,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:20:57,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:20:57,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:20:57,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:20:57,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:20:57,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:20:57,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:57,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:20:57,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:20:57,407 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:20:57,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:20:57,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:20:57,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:20:57,408 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:20:57,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:20:57,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:20:57,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:20:57,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:20:57,940 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:20:57,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-10-07 15:20:58,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065cb12ba/6aaff023b6924665aeee0df5ca4dd44d/FLAG8b28da131 [2021-10-07 15:20:58,703 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:20:58,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-10-07 15:20:58,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065cb12ba/6aaff023b6924665aeee0df5ca4dd44d/FLAG8b28da131 [2021-10-07 15:20:59,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/065cb12ba/6aaff023b6924665aeee0df5ca4dd44d [2021-10-07 15:20:59,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:20:59,067 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:20:59,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:59,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:20:59,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:20:59,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578034c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59, skipping insertion in model container [2021-10-07 15:20:59,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:20:59,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:20:59,383 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/bench-exp3x3.wvr.c[2619,2632] [2021-10-07 15:20:59,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,403 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:20:59,434 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/bench-exp3x3.wvr.c[2619,2632] [2021-10-07 15:20:59,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,455 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:20:59,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59 WrapperNode [2021-10-07 15:20:59,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:59,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:20:59,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:20:59,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:20:59,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:20:59,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:20:59,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:20:59,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:20:59,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (1/1) ... [2021-10-07 15:20:59,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:59,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 15:20:59,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 15:20:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:20:59,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:20:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:20:59,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:20:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 15:20:59,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 15:20:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:20:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-07 15:20:59,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-07 15:20:59,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-10-07 15:20:59,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-10-07 15:20:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-10-07 15:20:59,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-10-07 15:20:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:20:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:20:59,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:20:59,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:20:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:20:59,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:20:59,725 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:21:00,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:21:00,482 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-07 15:21:00,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:21:00 BoogieIcfgContainer [2021-10-07 15:21:00,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:21:00,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:21:00,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:21:00,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:21:00,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:20:59" (1/3) ... [2021-10-07 15:21:00,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719a388f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:21:00, skipping insertion in model container [2021-10-07 15:21:00,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59" (2/3) ... [2021-10-07 15:21:00,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719a388f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:21:00, skipping insertion in model container [2021-10-07 15:21:00,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:21:00" (3/3) ... [2021-10-07 15:21:00,497 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2021-10-07 15:21:00,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:21:00,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-07 15:21:00,504 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:21:00,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,573 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,575 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,576 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,576 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,577 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,578 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,578 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,578 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,579 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,580 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,580 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,580 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,580 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,585 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,590 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,590 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,593 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,593 WARN L313 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,599 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,599 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,602 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,603 WARN L313 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,619 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-10-07 15:21:00,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:21:00,687 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 15:21:00,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-10-07 15:21:00,708 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:21:00,720 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 189 transitions, 426 flow [2021-10-07 15:21:00,724 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 189 transitions, 426 flow [2021-10-07 15:21:00,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 194 places, 189 transitions, 426 flow [2021-10-07 15:21:00,808 INFO L129 PetriNetUnfolder]: 14/183 cut-off events. [2021-10-07 15:21:00,808 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-07 15:21:00,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 183 events. 14/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2021-10-07 15:21:00,823 INFO L116 LiptonReduction]: Number of co-enabled transitions 3780 [2021-10-07 15:21:35,046 INFO L131 LiptonReduction]: Checked pairs total: 5366 [2021-10-07 15:21:35,046 INFO L133 LiptonReduction]: Total number of compositions: 179 [2021-10-07 15:21:35,056 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 69 transitions, 186 flow [2021-10-07 15:21:35,137 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-07 15:21:35,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:35,150 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-07 15:21:35,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 685, now seen corresponding path program 1 times [2021-10-07 15:21:35,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:35,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982083902] [2021-10-07 15:21:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:35,173 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:35,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:35,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 15:21:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-07 15:21:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:35,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:35,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:35,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982083902] [2021-10-07 15:21:35,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982083902] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:35,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:35,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-07 15:21:35,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261974027] [2021-10-07 15:21:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-07 15:21:35,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-07 15:21:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-07 15:21:35,288 INFO L87 Difference]: Start difference. First operand has 759 states, 733 states have (on average 5.8594815825375175) internal successors, (4295), 758 states have internal predecessors, (4295), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:35,376 INFO L93 Difference]: Finished difference Result 756 states and 4292 transitions. [2021-10-07 15:21:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-07 15:21:35,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2021-10-07 15:21:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:35,411 INFO L225 Difference]: With dead ends: 756 [2021-10-07 15:21:35,412 INFO L226 Difference]: Without dead ends: 756 [2021-10-07 15:21:35,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-07 15:21:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-10-07 15:21:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 756. [2021-10-07 15:21:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 733 states have (on average 5.855388813096862) internal successors, (4292), 755 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 4292 transitions. [2021-10-07 15:21:35,537 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 4292 transitions. Word has length 1 [2021-10-07 15:21:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 4292 transitions. [2021-10-07 15:21:35,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 4292 transitions. [2021-10-07 15:21:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:35,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:35,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:35,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:35,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:35,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash 675309, now seen corresponding path program 1 times [2021-10-07 15:21:35,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:35,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530335515] [2021-10-07 15:21:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:35,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:35,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:35,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 15:21:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:35,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:35,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:36,146 INFO L354 Elim1Store]: treesize reduction 269, result has 13.2 percent of original size [2021-10-07 15:21:36,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 83 treesize of output 101 [2021-10-07 15:21:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:36,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:36,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530335515] [2021-10-07 15:21:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530335515] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:36,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:36,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:36,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499752647] [2021-10-07 15:21:36,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:36,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:36,888 INFO L87 Difference]: Start difference. First operand 756 states and 4292 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:37,204 INFO L93 Difference]: Finished difference Result 722 states and 4096 transitions. [2021-10-07 15:21:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:21:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:37,216 INFO L225 Difference]: With dead ends: 722 [2021-10-07 15:21:37,216 INFO L226 Difference]: Without dead ends: 722 [2021-10-07 15:21:37,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-10-07 15:21:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-10-07 15:21:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 701 states have (on average 5.843081312410842) internal successors, (4096), 721 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 4096 transitions. [2021-10-07 15:21:37,259 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 4096 transitions. Word has length 3 [2021-10-07 15:21:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:37,260 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 4096 transitions. [2021-10-07 15:21:37,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 4096 transitions. [2021-10-07 15:21:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:37,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:37,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:37,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:37,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:37,474 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash 675307, now seen corresponding path program 1 times [2021-10-07 15:21:37,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:37,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424943632] [2021-10-07 15:21:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:37,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:37,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 15:21:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:38,287 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:38,287 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 7 case distinctions, treesize of input 80 treesize of output 134 [2021-10-07 15:21:38,307 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-07 15:21:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 137 [2021-10-07 15:21:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:39,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:39,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:39,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424943632] [2021-10-07 15:21:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424943632] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:39,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:39,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:39,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678969580] [2021-10-07 15:21:39,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:39,294 INFO L87 Difference]: Start difference. First operand 722 states and 4096 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:39,638 INFO L93 Difference]: Finished difference Result 688 states and 3900 transitions. [2021-10-07 15:21:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:39,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:21:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:39,651 INFO L225 Difference]: With dead ends: 688 [2021-10-07 15:21:39,651 INFO L226 Difference]: Without dead ends: 688 [2021-10-07 15:21:39,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-10-07 15:21:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2021-10-07 15:21:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 669 states have (on average 5.829596412556054) internal successors, (3900), 687 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 3900 transitions. [2021-10-07 15:21:39,691 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 3900 transitions. Word has length 3 [2021-10-07 15:21:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 3900 transitions. [2021-10-07 15:21:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 3900 transitions. [2021-10-07 15:21:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:21:39,692 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:39,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:21:39,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:39,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:39,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash 648985899, now seen corresponding path program 1 times [2021-10-07 15:21:39,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:39,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757535526] [2021-10-07 15:21:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:39,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:39,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:39,910 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:39,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 15:21:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:21:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:40,196 INFO L354 Elim1Store]: treesize reduction 253, result has 13.9 percent of original size [2021-10-07 15:21:40,196 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 8 case distinctions, treesize of input 66 treesize of output 86 [2021-10-07 15:21:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:41,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:41,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:41,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757535526] [2021-10-07 15:21:41,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757535526] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:41,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:41,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:41,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997807447] [2021-10-07 15:21:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:41,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:41,049 INFO L87 Difference]: Start difference. First operand 688 states and 3900 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:41,308 INFO L93 Difference]: Finished difference Result 668 states and 3808 transitions. [2021-10-07 15:21:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:21:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:41,320 INFO L225 Difference]: With dead ends: 668 [2021-10-07 15:21:41,320 INFO L226 Difference]: Without dead ends: 668 [2021-10-07 15:21:41,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-10-07 15:21:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-10-07 15:21:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 651 states have (on average 5.849462365591398) internal successors, (3808), 667 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 3808 transitions. [2021-10-07 15:21:41,358 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 3808 transitions. Word has length 5 [2021-10-07 15:21:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:41,359 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 3808 transitions. [2021-10-07 15:21:41,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 3808 transitions. [2021-10-07 15:21:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:21:41,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:41,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:21:41,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:41,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:41,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 648985900, now seen corresponding path program 1 times [2021-10-07 15:21:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:41,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591527359] [2021-10-07 15:21:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:41,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:41,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 15:21:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:41,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:42,286 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:42,287 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 7 case distinctions, treesize of input 65 treesize of output 119 [2021-10-07 15:21:42,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 15:21:42,302 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 126 treesize of output 122 [2021-10-07 15:21:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:43,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:43,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:43,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591527359] [2021-10-07 15:21:43,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591527359] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:43,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:43,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:43,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463292478] [2021-10-07 15:21:43,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:43,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:43,391 INFO L87 Difference]: Start difference. First operand 668 states and 3808 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:43,644 INFO L93 Difference]: Finished difference Result 648 states and 3716 transitions. [2021-10-07 15:21:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:21:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:43,655 INFO L225 Difference]: With dead ends: 648 [2021-10-07 15:21:43,656 INFO L226 Difference]: Without dead ends: 648 [2021-10-07 15:21:43,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-10-07 15:21:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-10-07 15:21:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 633 states have (on average 5.8704581358609795) internal successors, (3716), 647 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 3716 transitions. [2021-10-07 15:21:43,719 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 3716 transitions. Word has length 5 [2021-10-07 15:21:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:43,720 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 3716 transitions. [2021-10-07 15:21:43,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 3716 transitions. [2021-10-07 15:21:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:21:43,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:43,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:43,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:43,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash 905208110, now seen corresponding path program 1 times [2021-10-07 15:21:43,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:43,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837162310] [2021-10-07 15:21:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:43,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:43,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:43,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 15:21:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:44,168 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-07 15:21:44,169 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 6 case distinctions, treesize of input 45 treesize of output 67 [2021-10-07 15:21:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:44,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:44,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:44,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837162310] [2021-10-07 15:21:44,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837162310] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:44,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:44,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:44,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806171803] [2021-10-07 15:21:44,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:44,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:44,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:44,964 INFO L87 Difference]: Start difference. First operand 648 states and 3716 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:45,088 INFO L93 Difference]: Finished difference Result 632 states and 3652 transitions. [2021-10-07 15:21:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:21:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:45,101 INFO L225 Difference]: With dead ends: 632 [2021-10-07 15:21:45,104 INFO L226 Difference]: Without dead ends: 632 [2021-10-07 15:21:45,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-10-07 15:21:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2021-10-07 15:21:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 619 states have (on average 5.89983844911147) internal successors, (3652), 631 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 3652 transitions. [2021-10-07 15:21:45,139 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 3652 transitions. Word has length 7 [2021-10-07 15:21:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:45,140 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 3652 transitions. [2021-10-07 15:21:45,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 3652 transitions. [2021-10-07 15:21:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:21:45,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:45,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:45,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-07 15:21:45,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:45,355 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash 905208112, now seen corresponding path program 1 times [2021-10-07 15:21:45,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:45,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595693035] [2021-10-07 15:21:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:45,358 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:45,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:45,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 15:21:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:21:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:45,888 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:45,889 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 7 case distinctions, treesize of input 47 treesize of output 101 [2021-10-07 15:21:45,897 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 105 treesize of output 103 [2021-10-07 15:21:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:46,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:46,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:46,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595693035] [2021-10-07 15:21:46,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595693035] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:46,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:46,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:46,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267960341] [2021-10-07 15:21:46,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:46,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:46,950 INFO L87 Difference]: Start difference. First operand 632 states and 3652 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:47,062 INFO L93 Difference]: Finished difference Result 616 states and 3588 transitions. [2021-10-07 15:21:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:21:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:47,072 INFO L225 Difference]: With dead ends: 616 [2021-10-07 15:21:47,072 INFO L226 Difference]: Without dead ends: 616 [2021-10-07 15:21:47,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-10-07 15:21:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-10-07 15:21:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 605 states have (on average 5.9305785123966945) internal successors, (3588), 615 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 3588 transitions. [2021-10-07 15:21:47,106 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 3588 transitions. Word has length 7 [2021-10-07 15:21:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:47,107 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 3588 transitions. [2021-10-07 15:21:47,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 3588 transitions. [2021-10-07 15:21:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:21:47,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:47,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:47,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:47,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:47,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1973351447, now seen corresponding path program 1 times [2021-10-07 15:21:47,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:47,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651946911] [2021-10-07 15:21:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:47,324 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:47,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:47,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:47,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 15:21:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:21:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:47,573 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-07 15:21:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-07 15:21:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:47,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:47,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:47,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651946911] [2021-10-07 15:21:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651946911] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:47,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:47,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:21:47,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165349222] [2021-10-07 15:21:47,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:21:47,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:21:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:47,682 INFO L87 Difference]: Start difference. First operand 616 states and 3588 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:47,751 INFO L93 Difference]: Finished difference Result 596 states and 3496 transitions. [2021-10-07 15:21:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:21:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:47,762 INFO L225 Difference]: With dead ends: 596 [2021-10-07 15:21:47,762 INFO L226 Difference]: Without dead ends: 596 [2021-10-07 15:21:47,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-10-07 15:21:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-10-07 15:21:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 587 states have (on average 5.955706984667803) internal successors, (3496), 595 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 3496 transitions. [2021-10-07 15:21:47,796 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 3496 transitions. Word has length 9 [2021-10-07 15:21:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:47,797 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 3496 transitions. [2021-10-07 15:21:47,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 3496 transitions. [2021-10-07 15:21:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:21:47,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:47,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:47,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:48,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1973351446, now seen corresponding path program 1 times [2021-10-07 15:21:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:48,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491946190] [2021-10-07 15:21:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:48,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:48,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:48,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:48,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 15:21:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:48,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:48,570 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:48,571 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 7 case distinctions, treesize of input 27 treesize of output 82 [2021-10-07 15:21:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:48,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:48,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491946190] [2021-10-07 15:21:48,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491946190] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:48,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:48,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:48,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503144246] [2021-10-07 15:21:48,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:48,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:48,834 INFO L87 Difference]: Start difference. First operand 596 states and 3496 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:48,898 INFO L93 Difference]: Finished difference Result 576 states and 3404 transitions. [2021-10-07 15:21:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:21:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:48,906 INFO L225 Difference]: With dead ends: 576 [2021-10-07 15:21:48,906 INFO L226 Difference]: Without dead ends: 576 [2021-10-07 15:21:48,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-10-07 15:21:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-10-07 15:21:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 569 states have (on average 5.982425307557118) internal successors, (3404), 575 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 3404 transitions. [2021-10-07 15:21:48,934 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 3404 transitions. Word has length 9 [2021-10-07 15:21:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:48,935 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 3404 transitions. [2021-10-07 15:21:48,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 3404 transitions. [2021-10-07 15:21:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:21:48,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:48,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:48,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:49,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:49,149 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1984821414, now seen corresponding path program 1 times [2021-10-07 15:21:49,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:49,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605567234] [2021-10-07 15:21:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:49,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:49,152 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 15:21:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:21:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:49,399 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-07 15:21:49,400 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 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-07 15:21:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:49,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:49,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605567234] [2021-10-07 15:21:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605567234] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:49,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:49,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:21:49,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347808882] [2021-10-07 15:21:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:21:49,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:21:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:49,499 INFO L87 Difference]: Start difference. First operand 576 states and 3404 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:49,555 INFO L93 Difference]: Finished difference Result 542 states and 3208 transitions. [2021-10-07 15:21:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:21:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:49,563 INFO L225 Difference]: With dead ends: 542 [2021-10-07 15:21:49,563 INFO L226 Difference]: Without dead ends: 542 [2021-10-07 15:21:49,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-07 15:21:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-10-07 15:21:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 5.973929236499069) internal successors, (3208), 541 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 3208 transitions. [2021-10-07 15:21:49,591 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 3208 transitions. Word has length 11 [2021-10-07 15:21:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:49,592 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 3208 transitions. [2021-10-07 15:21:49,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 3208 transitions. [2021-10-07 15:21:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:21:49,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:49,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:49,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:49,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:49,805 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:49,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1984821416, now seen corresponding path program 1 times [2021-10-07 15:21:49,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:49,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037735652] [2021-10-07 15:21:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:49,807 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:49,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:49,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:49,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 15:21:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:49,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:50,391 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:50,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 82 [2021-10-07 15:21:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:50,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:50,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:50,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037735652] [2021-10-07 15:21:50,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037735652] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:50,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:50,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623458477] [2021-10-07 15:21:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:50,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:50,688 INFO L87 Difference]: Start difference. First operand 542 states and 3208 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:50,741 INFO L93 Difference]: Finished difference Result 508 states and 3012 transitions. [2021-10-07 15:21:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:50,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:21:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:50,750 INFO L225 Difference]: With dead ends: 508 [2021-10-07 15:21:50,750 INFO L226 Difference]: Without dead ends: 508 [2021-10-07 15:21:50,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-10-07 15:21:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-10-07 15:21:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 505 states have (on average 5.964356435643564) internal successors, (3012), 507 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 3012 transitions. [2021-10-07 15:21:50,790 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 3012 transitions. Word has length 11 [2021-10-07 15:21:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:50,791 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 3012 transitions. [2021-10-07 15:21:50,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 3012 transitions. [2021-10-07 15:21:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:21:50,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:50,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:50,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:51,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:51,006 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash 447915403, now seen corresponding path program 1 times [2021-10-07 15:21:51,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:51,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751307729] [2021-10-07 15:21:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:51,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:51,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:51,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 15:21:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:51,583 INFO L354 Elim1Store]: treesize reduction 498, result has 13.4 percent of original size [2021-10-07 15:21:51,583 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 7 case distinctions, treesize of input 37 treesize of output 91 [2021-10-07 15:21:51,588 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 92 treesize of output 90 [2021-10-07 15:21:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:51,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:52,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:52,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751307729] [2021-10-07 15:21:52,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751307729] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:52,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:52,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:21:52,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823053658] [2021-10-07 15:21:52,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:52,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:52,219 INFO L87 Difference]: Start difference. First operand 508 states and 3012 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:52,303 INFO L93 Difference]: Finished difference Result 444 states and 2564 transitions. [2021-10-07 15:21:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:21:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:52,310 INFO L225 Difference]: With dead ends: 444 [2021-10-07 15:21:52,311 INFO L226 Difference]: Without dead ends: 444 [2021-10-07 15:21:52,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-07 15:21:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-10-07 15:21:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 442 states have (on average 5.800904977375565) internal successors, (2564), 443 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 2564 transitions. [2021-10-07 15:21:52,335 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 2564 transitions. Word has length 13 [2021-10-07 15:21:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:52,336 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 2564 transitions. [2021-10-07 15:21:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 2564 transitions. [2021-10-07 15:21:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:21:52,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:52,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:52,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:52,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:52,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash 447915404, now seen corresponding path program 1 times [2021-10-07 15:21:52,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:52,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874935769] [2021-10-07 15:21:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:52,553 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:52,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 15:21:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:52,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:52,863 INFO L354 Elim1Store]: treesize reduction 245, result has 14.3 percent of original size [2021-10-07 15:21:52,864 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 5 case distinctions, treesize of input 21 treesize of output 46 [2021-10-07 15:21:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:53,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:53,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:53,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874935769] [2021-10-07 15:21:53,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874935769] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:53,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:53,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-07 15:21:53,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089416418] [2021-10-07 15:21:53,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:21:53,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:21:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:21:53,348 INFO L87 Difference]: Start difference. First operand 444 states and 2564 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:53,468 INFO L93 Difference]: Finished difference Result 380 states and 2116 transitions. [2021-10-07 15:21:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:21:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:53,474 INFO L225 Difference]: With dead ends: 380 [2021-10-07 15:21:53,474 INFO L226 Difference]: Without dead ends: 380 [2021-10-07 15:21:53,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:21:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-07 15:21:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-10-07 15:21:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 5.58311345646438) internal successors, (2116), 379 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 2116 transitions. [2021-10-07 15:21:53,490 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 2116 transitions. Word has length 13 [2021-10-07 15:21:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:53,490 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 2116 transitions. [2021-10-07 15:21:53,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 2116 transitions. [2021-10-07 15:21:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-07 15:21:53,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:53,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:53,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:53,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:53,707 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash 40296099, now seen corresponding path program 1 times [2021-10-07 15:21:53,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:53,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212544778] [2021-10-07 15:21:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:53,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:53,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:53,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 15:21:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:53,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:54,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:55,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:55,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212544778] [2021-10-07 15:21:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212544778] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:55,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:55,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:55,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472551197] [2021-10-07 15:21:55,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:55,092 INFO L87 Difference]: Start difference. First operand 380 states and 2116 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:55,163 INFO L93 Difference]: Finished difference Result 757 states and 4229 transitions. [2021-10-07 15:21:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:55,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 31 [2021-10-07 15:21:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:55,173 INFO L225 Difference]: With dead ends: 757 [2021-10-07 15:21:55,173 INFO L226 Difference]: Without dead ends: 744 [2021-10-07 15:21:55,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-07 15:21:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2021-10-07 15:21:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 5.619111709286676) internal successors, (4175), 743 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 4175 transitions. [2021-10-07 15:21:55,212 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 4175 transitions. Word has length 31 [2021-10-07 15:21:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:55,212 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 4175 transitions. [2021-10-07 15:21:55,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 4175 transitions. [2021-10-07 15:21:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:21:55,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:55,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:55,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:55,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:55,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash 68639436, now seen corresponding path program 1 times [2021-10-07 15:21:55,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:55,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344374078] [2021-10-07 15:21:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:55,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:55,434 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:55,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 15:21:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:56,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:56,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344374078] [2021-10-07 15:21:56,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344374078] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:56,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:56,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-07 15:21:56,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39979104] [2021-10-07 15:21:56,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:56,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:56,028 INFO L87 Difference]: Start difference. First operand 744 states and 4175 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:56,516 INFO L93 Difference]: Finished difference Result 2614 states and 14385 transitions. [2021-10-07 15:21:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:21:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-07 15:21:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:56,547 INFO L225 Difference]: With dead ends: 2614 [2021-10-07 15:21:56,548 INFO L226 Difference]: Without dead ends: 2614 [2021-10-07 15:21:56,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-10-07 15:21:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 1144. [2021-10-07 15:21:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 6.111986001749782) internal successors, (6986), 1143 states have internal predecessors, (6986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 6986 transitions. [2021-10-07 15:21:56,632 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 6986 transitions. Word has length 32 [2021-10-07 15:21:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 6986 transitions. [2021-10-07 15:21:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 6986 transitions. [2021-10-07 15:21:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:21:56,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:56,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:56,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:56,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:56,852 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:56,853 INFO L82 PathProgramCache]: Analyzing trace with hash -27679950, now seen corresponding path program 1 times [2021-10-07 15:21:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:56,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537424113] [2021-10-07 15:21:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:56,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:56,856 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:56,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 15:21:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:57,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:57,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537424113] [2021-10-07 15:21:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537424113] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:57,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:57,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:57,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440686890] [2021-10-07 15:21:57,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:57,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:57,304 INFO L87 Difference]: Start difference. First operand 1144 states and 6986 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:57,568 INFO L93 Difference]: Finished difference Result 1672 states and 9313 transitions. [2021-10-07 15:21:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:21:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 32 [2021-10-07 15:21:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:57,582 INFO L225 Difference]: With dead ends: 1672 [2021-10-07 15:21:57,582 INFO L226 Difference]: Without dead ends: 1666 [2021-10-07 15:21:57,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-10-07 15:21:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1294. [2021-10-07 15:21:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 5.875483372003093) internal successors, (7597), 1293 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 7597 transitions. [2021-10-07 15:21:57,691 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 7597 transitions. Word has length 32 [2021-10-07 15:21:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 7597 transitions. [2021-10-07 15:21:57,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 7597 transitions. [2021-10-07 15:21:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:21:57,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:57,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:57,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:57,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:57,912 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2018767441, now seen corresponding path program 1 times [2021-10-07 15:21:57,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:57,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295106656] [2021-10-07 15:21:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:57,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:57,916 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:57,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 15:21:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:58,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:58,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:58,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295106656] [2021-10-07 15:21:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295106656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:58,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:58,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-07 15:21:58,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503895838] [2021-10-07 15:21:58,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:58,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:58,535 INFO L87 Difference]: Start difference. First operand 1294 states and 7597 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:58,999 INFO L93 Difference]: Finished difference Result 5676 states and 34223 transitions. [2021-10-07 15:21:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:21:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 32 [2021-10-07 15:21:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:59,059 INFO L225 Difference]: With dead ends: 5676 [2021-10-07 15:21:59,059 INFO L226 Difference]: Without dead ends: 5676 [2021-10-07 15:21:59,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-10-07 15:21:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 2590. [2021-10-07 15:21:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 6.6859791425260715) internal successors, (17310), 2589 states have internal predecessors, (17310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 17310 transitions. [2021-10-07 15:21:59,357 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 17310 transitions. Word has length 32 [2021-10-07 15:21:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:59,358 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 17310 transitions. [2021-10-07 15:21:59,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 17310 transitions. [2021-10-07 15:21:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:21:59,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:59,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:59,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:59,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:21:59,594 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:21:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:59,595 INFO L82 PathProgramCache]: Analyzing trace with hash 686420959, now seen corresponding path program 1 times [2021-10-07 15:21:59,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:59,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684073964] [2021-10-07 15:21:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:59,596 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:59,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:59,597 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:21:59,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 15:21:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:00,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:00,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:00,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684073964] [2021-10-07 15:22:00,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684073964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:00,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:00,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:22:00,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812422128] [2021-10-07 15:22:00,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:22:00,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:22:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:22:00,292 INFO L87 Difference]: Start difference. First operand 2590 states and 17310 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:00,512 INFO L93 Difference]: Finished difference Result 5822 states and 39748 transitions. [2021-10-07 15:22:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:22:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 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 32 [2021-10-07 15:22:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:00,567 INFO L225 Difference]: With dead ends: 5822 [2021-10-07 15:22:00,568 INFO L226 Difference]: Without dead ends: 5822 [2021-10-07 15:22:00,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:22:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-10-07 15:22:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4072. [2021-10-07 15:22:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4071 states have (on average 7.055268975681651) internal successors, (28722), 4071 states have internal predecessors, (28722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 28722 transitions. [2021-10-07 15:22:00,962 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 28722 transitions. Word has length 32 [2021-10-07 15:22:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:00,962 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 28722 transitions. [2021-10-07 15:22:00,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 28722 transitions. [2021-10-07 15:22:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:22:00,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:00,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:01,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:01,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,207 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash 545824974, now seen corresponding path program 1 times [2021-10-07 15:22:01,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:01,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363435628] [2021-10-07 15:22:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:01,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:01,211 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:01,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 15:22:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:01,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:01,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:02,044 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:02,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363435628] [2021-10-07 15:22:02,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363435628] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:02,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:02,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-07 15:22:02,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295466797] [2021-10-07 15:22:02,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:02,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:02,046 INFO L87 Difference]: Start difference. First operand 4072 states and 28722 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:02,713 INFO L93 Difference]: Finished difference Result 11908 states and 82754 transitions. [2021-10-07 15:22:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:22:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 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 32 [2021-10-07 15:22:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:02,917 INFO L225 Difference]: With dead ends: 11908 [2021-10-07 15:22:02,917 INFO L226 Difference]: Without dead ends: 11908 [2021-10-07 15:22:02,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11908 states. [2021-10-07 15:22:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11908 to 5796. [2021-10-07 15:22:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 7.414495254529767) internal successors, (42967), 5795 states have internal predecessors, (42967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 42967 transitions. [2021-10-07 15:22:03,757 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 42967 transitions. Word has length 32 [2021-10-07 15:22:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:03,760 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 42967 transitions. [2021-10-07 15:22:03,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 42967 transitions. [2021-10-07 15:22:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:22:03,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:03,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:03,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-07 15:22:04,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:04,010 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1507107543, now seen corresponding path program 2 times [2021-10-07 15:22:04,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:04,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598217617] [2021-10-07 15:22:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:04,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:04,014 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 15:22:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:22:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:04,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:04,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:04,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598217617] [2021-10-07 15:22:04,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598217617] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:22:04,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:22:04,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:22:04,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970808664] [2021-10-07 15:22:04,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:22:04,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:22:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:22:04,807 INFO L87 Difference]: Start difference. First operand 5796 states and 42967 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:05,109 INFO L93 Difference]: Finished difference Result 8140 states and 56757 transitions. [2021-10-07 15:22:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:22:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 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 32 [2021-10-07 15:22:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:05,275 INFO L225 Difference]: With dead ends: 8140 [2021-10-07 15:22:05,275 INFO L226 Difference]: Without dead ends: 8100 [2021-10-07 15:22:05,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:22:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-10-07 15:22:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 6444. [2021-10-07 15:22:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6444 states, 6443 states have (on average 7.2731646748409124) internal successors, (46861), 6443 states have internal predecessors, (46861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 46861 transitions. [2021-10-07 15:22:05,772 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 46861 transitions. Word has length 32 [2021-10-07 15:22:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 6444 states and 46861 transitions. [2021-10-07 15:22:05,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 46861 transitions. [2021-10-07 15:22:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:22:05,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:05,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:05,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:06,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:06,028 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1979610523, now seen corresponding path program 1 times [2021-10-07 15:22:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:06,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495108971] [2021-10-07 15:22:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:06,030 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:06,031 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:06,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 15:22:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:06,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:07,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495108971] [2021-10-07 15:22:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495108971] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 15:22:07,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:22:07,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-07 15:22:07,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844420173] [2021-10-07 15:22:07,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:22:07,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:07,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:22:07,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:22:07,037 INFO L87 Difference]: Start difference. First operand 6444 states and 46861 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:07,253 INFO L93 Difference]: Finished difference Result 8248 states and 56333 transitions. [2021-10-07 15:22:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:22:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-07 15:22:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:07,305 INFO L225 Difference]: With dead ends: 8248 [2021-10-07 15:22:07,305 INFO L226 Difference]: Without dead ends: 8158 [2021-10-07 15:22:07,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8158 states. [2021-10-07 15:22:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8158 to 7538. [2021-10-07 15:22:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 7.0439166777232325) internal successors, (53090), 7537 states have internal predecessors, (53090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 53090 transitions. [2021-10-07 15:22:07,838 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 53090 transitions. Word has length 32 [2021-10-07 15:22:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:07,840 INFO L470 AbstractCegarLoop]: Abstraction has 7538 states and 53090 transitions. [2021-10-07 15:22:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 53090 transitions. [2021-10-07 15:22:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:22:07,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:07,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:07,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:08,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:08,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1278377847, now seen corresponding path program 2 times [2021-10-07 15:22:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:08,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380246044] [2021-10-07 15:22:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:08,109 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:08,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 15:22:08,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:09,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:09,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380246044] [2021-10-07 15:22:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380246044] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:09,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:09,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-07 15:22:09,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769008504] [2021-10-07 15:22:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:09,184 INFO L87 Difference]: Start difference. First operand 7538 states and 53090 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:10,128 INFO L93 Difference]: Finished difference Result 17446 states and 116270 transitions. [2021-10-07 15:22:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:22:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 32 [2021-10-07 15:22:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:10,262 INFO L225 Difference]: With dead ends: 17446 [2021-10-07 15:22:10,262 INFO L226 Difference]: Without dead ends: 17446 [2021-10-07 15:22:10,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17446 states. [2021-10-07 15:22:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17446 to 10518. [2021-10-07 15:22:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 7.257773129219359) internal successors, (76330), 10517 states have internal predecessors, (76330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 76330 transitions. [2021-10-07 15:22:11,127 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 76330 transitions. Word has length 32 [2021-10-07 15:22:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:11,129 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 76330 transitions. [2021-10-07 15:22:11,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 76330 transitions. [2021-10-07 15:22:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-07 15:22:11,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:11,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:11,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:11,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:11,639 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -606674130, now seen corresponding path program 2 times [2021-10-07 15:22:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:11,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385063479] [2021-10-07 15:22:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:11,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:11,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:11,643 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:11,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 15:22:12,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:12,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:12,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:12,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:12,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385063479] [2021-10-07 15:22:12,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385063479] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:12,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:12,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-07 15:22:12,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541013671] [2021-10-07 15:22:12,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:12,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:12,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:12,443 INFO L87 Difference]: Start difference. First operand 10518 states and 76330 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:13,402 INFO L93 Difference]: Finished difference Result 26884 states and 183800 transitions. [2021-10-07 15:22:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:22:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-07 15:22:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:13,794 INFO L225 Difference]: With dead ends: 26884 [2021-10-07 15:22:13,795 INFO L226 Difference]: Without dead ends: 26884 [2021-10-07 15:22:13,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26884 states. [2021-10-07 15:22:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26884 to 13808. [2021-10-07 15:22:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 13807 states have (on average 7.460708336351126) internal successors, (103010), 13807 states have internal predecessors, (103010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 103010 transitions. [2021-10-07 15:22:15,024 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 103010 transitions. Word has length 32 [2021-10-07 15:22:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:15,025 INFO L470 AbstractCegarLoop]: Abstraction has 13808 states and 103010 transitions. [2021-10-07 15:22:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 103010 transitions. [2021-10-07 15:22:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:15,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:15,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:15,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:15,302 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:15,303 INFO L82 PathProgramCache]: Analyzing trace with hash 850963497, now seen corresponding path program 1 times [2021-10-07 15:22:15,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:15,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793929576] [2021-10-07 15:22:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:15,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:15,305 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:15,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 15:22:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:16,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:17,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:17,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793929576] [2021-10-07 15:22:17,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793929576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:17,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:17,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:17,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452682579] [2021-10-07 15:22:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:17,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:17,364 INFO L87 Difference]: Start difference. First operand 13808 states and 103010 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:18,011 INFO L93 Difference]: Finished difference Result 15116 states and 109183 transitions. [2021-10-07 15:22:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:18,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:18,095 INFO L225 Difference]: With dead ends: 15116 [2021-10-07 15:22:18,095 INFO L226 Difference]: Without dead ends: 14950 [2021-10-07 15:22:18,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14950 states. [2021-10-07 15:22:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14950 to 14272. [2021-10-07 15:22:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 7.410622941629879) internal successors, (105757), 14271 states have internal predecessors, (105757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 105757 transitions. [2021-10-07 15:22:19,149 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 105757 transitions. Word has length 33 [2021-10-07 15:22:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 14272 states and 105757 transitions. [2021-10-07 15:22:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 105757 transitions. [2021-10-07 15:22:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:19,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:19,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:19,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:19,425 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1721817073, now seen corresponding path program 1 times [2021-10-07 15:22:19,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:19,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708760966] [2021-10-07 15:22:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:19,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:19,429 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:19,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 15:22:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:20,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:21,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:21,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708760966] [2021-10-07 15:22:21,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708760966] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:21,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:21,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:21,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024160848] [2021-10-07 15:22:21,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:21,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:21,309 INFO L87 Difference]: Start difference. First operand 14272 states and 105757 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:21,957 INFO L93 Difference]: Finished difference Result 15612 states and 112115 transitions. [2021-10-07 15:22:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:22,056 INFO L225 Difference]: With dead ends: 15612 [2021-10-07 15:22:22,056 INFO L226 Difference]: Without dead ends: 15494 [2021-10-07 15:22:22,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15494 states. [2021-10-07 15:22:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15494 to 14858. [2021-10-07 15:22:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 7.347647573534361) internal successors, (109164), 14857 states have internal predecessors, (109164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 109164 transitions. [2021-10-07 15:22:22,777 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 109164 transitions. Word has length 33 [2021-10-07 15:22:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:22,778 INFO L470 AbstractCegarLoop]: Abstraction has 14858 states and 109164 transitions. [2021-10-07 15:22:22,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 109164 transitions. [2021-10-07 15:22:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:23,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:23,096 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:23,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:23,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:23,309 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash -899140846, now seen corresponding path program 1 times [2021-10-07 15:22:23,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:23,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356857316] [2021-10-07 15:22:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:23,312 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:23,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:23,313 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 15:22:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:25,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:25,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356857316] [2021-10-07 15:22:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356857316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:25,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:25,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377813850] [2021-10-07 15:22:25,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:25,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:25,052 INFO L87 Difference]: Start difference. First operand 14858 states and 109164 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:25,980 INFO L93 Difference]: Finished difference Result 15860 states and 114037 transitions. [2021-10-07 15:22:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:26,096 INFO L225 Difference]: With dead ends: 15860 [2021-10-07 15:22:26,096 INFO L226 Difference]: Without dead ends: 15770 [2021-10-07 15:22:26,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15770 states. [2021-10-07 15:22:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15770 to 15340. [2021-10-07 15:22:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 7.289262663798161) internal successors, (111810), 15339 states have internal predecessors, (111810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 111810 transitions. [2021-10-07 15:22:26,839 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 111810 transitions. Word has length 33 [2021-10-07 15:22:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:26,840 INFO L470 AbstractCegarLoop]: Abstraction has 15340 states and 111810 transitions. [2021-10-07 15:22:26,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 111810 transitions. [2021-10-07 15:22:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:26,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:26,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:26,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:27,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:27,098 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1064147448, now seen corresponding path program 2 times [2021-10-07 15:22:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:27,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383275973] [2021-10-07 15:22:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:27,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:27,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:27,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:27,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 15:22:27,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:27,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:28,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:29,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:29,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383275973] [2021-10-07 15:22:29,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383275973] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:29,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:29,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:29,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592459848] [2021-10-07 15:22:29,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:29,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:29,420 INFO L87 Difference]: Start difference. First operand 15340 states and 111810 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:29,922 INFO L93 Difference]: Finished difference Result 16276 states and 116313 transitions. [2021-10-07 15:22:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:30,220 INFO L225 Difference]: With dead ends: 16276 [2021-10-07 15:22:30,220 INFO L226 Difference]: Without dead ends: 16186 [2021-10-07 15:22:30,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16186 states. [2021-10-07 15:22:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16186 to 15702. [2021-10-07 15:22:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15702 states, 15701 states have (on average 7.25501560410165) internal successors, (113911), 15701 states have internal predecessors, (113911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 113911 transitions. [2021-10-07 15:22:31,004 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 113911 transitions. Word has length 33 [2021-10-07 15:22:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:31,004 INFO L470 AbstractCegarLoop]: Abstraction has 15702 states and 113911 transitions. [2021-10-07 15:22:31,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 113911 transitions. [2021-10-07 15:22:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:31,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:31,086 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:31,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:31,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:31,302 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1122383815, now seen corresponding path program 2 times [2021-10-07 15:22:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:31,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520198478] [2021-10-07 15:22:31,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:31,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:31,307 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 15:22:31,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:31,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:32,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:33,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:33,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520198478] [2021-10-07 15:22:33,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520198478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:33,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:33,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:33,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169840626] [2021-10-07 15:22:33,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:33,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:33,565 INFO L87 Difference]: Start difference. First operand 15702 states and 113911 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:34,332 INFO L93 Difference]: Finished difference Result 16944 states and 119922 transitions. [2021-10-07 15:22:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:34,425 INFO L225 Difference]: With dead ends: 16944 [2021-10-07 15:22:34,425 INFO L226 Difference]: Without dead ends: 16826 [2021-10-07 15:22:34,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16826 states. [2021-10-07 15:22:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16826 to 16136. [2021-10-07 15:22:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16136 states, 16135 states have (on average 7.219584753641152) internal successors, (116488), 16135 states have internal predecessors, (116488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 116488 transitions. [2021-10-07 15:22:35,171 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 116488 transitions. Word has length 33 [2021-10-07 15:22:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:35,172 INFO L470 AbstractCegarLoop]: Abstraction has 16136 states and 116488 transitions. [2021-10-07 15:22:35,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 116488 transitions. [2021-10-07 15:22:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-07 15:22:35,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:35,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:35,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-07 15:22:35,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:35,430 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1784402153, now seen corresponding path program 2 times [2021-10-07 15:22:35,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:35,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540813096] [2021-10-07 15:22:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:35,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:35,433 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:35,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 15:22:36,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:37,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:37,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:37,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540813096] [2021-10-07 15:22:37,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540813096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:37,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:37,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:22:37,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691442238] [2021-10-07 15:22:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:22:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:22:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:37,823 INFO L87 Difference]: Start difference. First operand 16136 states and 116488 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:38,516 INFO L93 Difference]: Finished difference Result 17378 states and 122339 transitions. [2021-10-07 15:22:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:22:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 33 [2021-10-07 15:22:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:38,624 INFO L225 Difference]: With dead ends: 17378 [2021-10-07 15:22:38,624 INFO L226 Difference]: Without dead ends: 17212 [2021-10-07 15:22:38,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:22:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17212 states. [2021-10-07 15:22:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17212 to 16444. [2021-10-07 15:22:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16444 states, 16443 states have (on average 7.194854953475643) internal successors, (118305), 16443 states have internal predecessors, (118305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16444 states to 16444 states and 118305 transitions. [2021-10-07 15:22:39,423 INFO L78 Accepts]: Start accepts. Automaton has 16444 states and 118305 transitions. Word has length 33 [2021-10-07 15:22:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:39,423 INFO L470 AbstractCegarLoop]: Abstraction has 16444 states and 118305 transitions. [2021-10-07 15:22:39,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16444 states and 118305 transitions. [2021-10-07 15:22:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:22:39,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:39,481 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:39,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-07 15:22:39,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:39,681 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1975860718, now seen corresponding path program 3 times [2021-10-07 15:22:39,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:39,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181773752] [2021-10-07 15:22:39,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:22:39,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:39,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:39,686 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:39,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 15:22:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:22:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:22:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:40,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181773752] [2021-10-07 15:22:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181773752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:40,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 15:22:40,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797336762] [2021-10-07 15:22:40,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:40,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:40,930 INFO L87 Difference]: Start difference. First operand 16444 states and 118305 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:44,017 INFO L93 Difference]: Finished difference Result 43742 states and 297049 transitions. [2021-10-07 15:22:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:22:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 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 34 [2021-10-07 15:22:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:44,758 INFO L225 Difference]: With dead ends: 43742 [2021-10-07 15:22:44,758 INFO L226 Difference]: Without dead ends: 43742 [2021-10-07 15:22:44,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:22:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43742 states. [2021-10-07 15:22:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43742 to 21920. [2021-10-07 15:22:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21920 states, 21919 states have (on average 7.351567133537114) internal successors, (161139), 21919 states have internal predecessors, (161139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21920 states to 21920 states and 161139 transitions. [2021-10-07 15:22:46,729 INFO L78 Accepts]: Start accepts. Automaton has 21920 states and 161139 transitions. Word has length 34 [2021-10-07 15:22:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:46,729 INFO L470 AbstractCegarLoop]: Abstraction has 21920 states and 161139 transitions. [2021-10-07 15:22:46,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21920 states and 161139 transitions. [2021-10-07 15:22:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:22:46,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:46,813 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:46,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:47,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:22:47,014 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:22:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -666794388, now seen corresponding path program 4 times [2021-10-07 15:22:47,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:47,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162994234] [2021-10-07 15:22:47,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:22:47,016 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:47,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:47,017 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:22:47,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 15:22:47,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:22:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:47,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:47,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162994234] [2021-10-07 15:22:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162994234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:47,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:47,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:47,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842698116] [2021-10-07 15:22:47,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:47,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:47,920 INFO L87 Difference]: Start difference. First operand 21920 states and 161139 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:34,446 INFO L93 Difference]: Finished difference Result 40288 states and 271004 transitions. [2021-10-07 15:23:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:23:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 34 [2021-10-07 15:23:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:34,677 INFO L225 Difference]: With dead ends: 40288 [2021-10-07 15:23:34,677 INFO L226 Difference]: Without dead ends: 40120 [2021-10-07 15:23:34,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:23:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40120 states. [2021-10-07 15:23:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40120 to 23180. [2021-10-07 15:23:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23180 states, 23179 states have (on average 7.303334915224988) internal successors, (169284), 23179 states have internal predecessors, (169284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23180 states to 23180 states and 169284 transitions. [2021-10-07 15:23:36,210 INFO L78 Accepts]: Start accepts. Automaton has 23180 states and 169284 transitions. Word has length 34 [2021-10-07 15:23:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:36,210 INFO L470 AbstractCegarLoop]: Abstraction has 23180 states and 169284 transitions. [2021-10-07 15:23:36,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23180 states and 169284 transitions. [2021-10-07 15:23:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:23:36,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:36,296 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:36,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:36,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:36,497 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash 818766358, now seen corresponding path program 5 times [2021-10-07 15:23:36,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:36,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062330617] [2021-10-07 15:23:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:23:36,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:36,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:36,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 15:23:37,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:23:37,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:23:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:37,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:38,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:38,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062330617] [2021-10-07 15:23:38,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062330617] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:38,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:38,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:23:38,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203660391] [2021-10-07 15:23:38,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:23:38,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:23:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:23:38,011 INFO L87 Difference]: Start difference. First operand 23180 states and 169284 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:40,867 INFO L93 Difference]: Finished difference Result 49646 states and 333188 transitions. [2021-10-07 15:23:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:23:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 34 [2021-10-07 15:23:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:41,242 INFO L225 Difference]: With dead ends: 49646 [2021-10-07 15:23:41,243 INFO L226 Difference]: Without dead ends: 49646 [2021-10-07 15:23:41,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:23:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49646 states. [2021-10-07 15:23:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49646 to 22222. [2021-10-07 15:23:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22222 states, 22221 states have (on average 7.250483776607713) internal successors, (161113), 22221 states have internal predecessors, (161113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22222 states to 22222 states and 161113 transitions. [2021-10-07 15:23:42,922 INFO L78 Accepts]: Start accepts. Automaton has 22222 states and 161113 transitions. Word has length 34 [2021-10-07 15:23:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 22222 states and 161113 transitions. [2021-10-07 15:23:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22222 states and 161113 transitions. [2021-10-07 15:23:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:23:43,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:43,004 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:43,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-07 15:23:43,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:43,214 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash -823239486, now seen corresponding path program 6 times [2021-10-07 15:23:43,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:43,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861228005] [2021-10-07 15:23:43,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:23:43,216 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:43,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:43,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:43,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 15:23:44,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:23:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:44,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:45,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:45,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861228005] [2021-10-07 15:23:45,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861228005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:45,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:45,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:23:45,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650101422] [2021-10-07 15:23:45,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:23:45,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:45,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:23:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:23:45,212 INFO L87 Difference]: Start difference. First operand 22222 states and 161113 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:48,961 INFO L93 Difference]: Finished difference Result 76668 states and 514547 transitions. [2021-10-07 15:23:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:23:48,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 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 34 [2021-10-07 15:23:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:50,058 INFO L225 Difference]: With dead ends: 76668 [2021-10-07 15:23:50,059 INFO L226 Difference]: Without dead ends: 76668 [2021-10-07 15:23:50,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1283.5ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:23:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76668 states. [2021-10-07 15:23:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76668 to 26170. [2021-10-07 15:23:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26170 states, 26169 states have (on average 7.480645038022087) internal successors, (195761), 26169 states have internal predecessors, (195761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26170 states to 26170 states and 195761 transitions. [2021-10-07 15:23:52,926 INFO L78 Accepts]: Start accepts. Automaton has 26170 states and 195761 transitions. Word has length 34 [2021-10-07 15:23:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 26170 states and 195761 transitions. [2021-10-07 15:23:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 26170 states and 195761 transitions. [2021-10-07 15:23:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:23:53,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:53,094 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:53,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:53,295 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:23:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash 996956340, now seen corresponding path program 7 times [2021-10-07 15:23:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:53,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515228318] [2021-10-07 15:23:53,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:23:53,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:53,299 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:53,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 15:23:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:53,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:23:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:54,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:54,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:54,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515228318] [2021-10-07 15:23:54,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515228318] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:54,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:54,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:23:54,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217287681] [2021-10-07 15:23:54,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:23:54,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:23:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:23:54,278 INFO L87 Difference]: Start difference. First operand 26170 states and 195761 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:31,003 INFO L93 Difference]: Finished difference Result 41406 states and 287058 transitions. [2021-10-07 15:24:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:24:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 34 [2021-10-07 15:24:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:31,288 INFO L225 Difference]: With dead ends: 41406 [2021-10-07 15:24:31,289 INFO L226 Difference]: Without dead ends: 41298 [2021-10-07 15:24:31,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:24:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41298 states. [2021-10-07 15:24:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41298 to 26292. [2021-10-07 15:24:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26292 states, 26291 states have (on average 7.472024647217679) internal successors, (196447), 26291 states have internal predecessors, (196447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26292 states to 26292 states and 196447 transitions. [2021-10-07 15:24:33,193 INFO L78 Accepts]: Start accepts. Automaton has 26292 states and 196447 transitions. Word has length 34 [2021-10-07 15:24:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:33,193 INFO L470 AbstractCegarLoop]: Abstraction has 26292 states and 196447 transitions. [2021-10-07 15:24:33,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26292 states and 196447 transitions. [2021-10-07 15:24:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:24:33,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:33,792 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:33,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:34,007 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash -501955557, now seen corresponding path program 3 times [2021-10-07 15:24:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:34,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511387144] [2021-10-07 15:24:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:24:34,009 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:34,011 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:34,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 15:24:34,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:24:34,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:24:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:35,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:35,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:35,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511387144] [2021-10-07 15:24:35,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511387144] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:35,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:35,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 15:24:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733432760] [2021-10-07 15:24:35,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:35,986 INFO L87 Difference]: Start difference. First operand 26292 states and 196447 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:39,328 INFO L93 Difference]: Finished difference Result 58242 states and 414140 transitions. [2021-10-07 15:24:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:24:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 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 34 [2021-10-07 15:24:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:40,816 INFO L225 Difference]: With dead ends: 58242 [2021-10-07 15:24:40,816 INFO L226 Difference]: Without dead ends: 58242 [2021-10-07 15:24:40,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:24:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58242 states. [2021-10-07 15:24:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58242 to 39886. [2021-10-07 15:24:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39886 states, 39885 states have (on average 7.495549705403033) internal successors, (298960), 39885 states have internal predecessors, (298960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39886 states to 39886 states and 298960 transitions. [2021-10-07 15:24:44,948 INFO L78 Accepts]: Start accepts. Automaton has 39886 states and 298960 transitions. Word has length 34 [2021-10-07 15:24:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:44,948 INFO L470 AbstractCegarLoop]: Abstraction has 39886 states and 298960 transitions. [2021-10-07 15:24:44,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39886 states and 298960 transitions. [2021-10-07 15:24:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:24:45,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:45,126 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:45,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:45,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:45,327 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash 343488029, now seen corresponding path program 4 times [2021-10-07 15:24:45,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:45,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531995188] [2021-10-07 15:24:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:24:45,331 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:45,332 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:45,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 15:24:45,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:24:45,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:46,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:24:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:47,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:47,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531995188] [2021-10-07 15:24:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531995188] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:47,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:24:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032051611] [2021-10-07 15:24:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:24:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:24:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:24:47,086 INFO L87 Difference]: Start difference. First operand 39886 states and 298960 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:51,638 INFO L93 Difference]: Finished difference Result 59474 states and 417456 transitions. [2021-10-07 15:24:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:24:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 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 34 [2021-10-07 15:24:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:52,209 INFO L225 Difference]: With dead ends: 59474 [2021-10-07 15:24:52,210 INFO L226 Difference]: Without dead ends: 59378 [2021-10-07 15:24:52,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 539.2ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:24:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59378 states. [2021-10-07 15:24:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59378 to 41476. [2021-10-07 15:24:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41476 states, 41475 states have (on average 7.436262808921037) internal successors, (308419), 41475 states have internal predecessors, (308419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41476 states to 41476 states and 308419 transitions. [2021-10-07 15:24:55,702 INFO L78 Accepts]: Start accepts. Automaton has 41476 states and 308419 transitions. Word has length 34 [2021-10-07 15:24:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:55,702 INFO L470 AbstractCegarLoop]: Abstraction has 41476 states and 308419 transitions. [2021-10-07 15:24:55,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 41476 states and 308419 transitions. [2021-10-07 15:24:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:24:55,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:55,971 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:55,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:56,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:56,187 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:24:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:56,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1952721965, now seen corresponding path program 5 times [2021-10-07 15:24:56,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:56,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196900892] [2021-10-07 15:24:56,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:24:56,189 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:56,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:56,191 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:56,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-07 15:24:56,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:24:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:24:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:57,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:57,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:57,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196900892] [2021-10-07 15:24:57,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196900892] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:57,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:57,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:24:57,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635102603] [2021-10-07 15:24:57,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:24:57,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:24:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:24:57,447 INFO L87 Difference]: Start difference. First operand 41476 states and 308419 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:43,014 INFO L93 Difference]: Finished difference Result 69169 states and 479264 transitions. [2021-10-07 15:25:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:25:43,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 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 34 [2021-10-07 15:25:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:43,728 INFO L225 Difference]: With dead ends: 69169 [2021-10-07 15:25:43,728 INFO L226 Difference]: Without dead ends: 69037 [2021-10-07 15:25:43,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2424.4ms TimeCoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2021-10-07 15:25:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69037 states. [2021-10-07 15:25:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69037 to 43030. [2021-10-07 15:25:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43030 states, 43029 states have (on average 7.481140626089382) internal successors, (321906), 43029 states have internal predecessors, (321906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43030 states to 43030 states and 321906 transitions. [2021-10-07 15:25:47,169 INFO L78 Accepts]: Start accepts. Automaton has 43030 states and 321906 transitions. Word has length 34 [2021-10-07 15:25:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:47,169 INFO L470 AbstractCegarLoop]: Abstraction has 43030 states and 321906 transitions. [2021-10-07 15:25:47,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43030 states and 321906 transitions. [2021-10-07 15:25:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:25:47,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:47,984 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:48,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:48,198 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:48,198 INFO L82 PathProgramCache]: Analyzing trace with hash 704672875, now seen corresponding path program 6 times [2021-10-07 15:25:48,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:48,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586351492] [2021-10-07 15:25:48,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:25:48,200 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:48,201 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:48,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-07 15:25:49,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:25:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:25:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:49,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:49,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:49,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586351492] [2021-10-07 15:25:49,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586351492] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:49,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:49,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:25:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838930185] [2021-10-07 15:25:49,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:25:49,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:25:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:25:49,711 INFO L87 Difference]: Start difference. First operand 43030 states and 321906 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:53,233 INFO L93 Difference]: Finished difference Result 77030 states and 543951 transitions. [2021-10-07 15:25:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:25:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 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 34 [2021-10-07 15:25:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:54,021 INFO L225 Difference]: With dead ends: 77030 [2021-10-07 15:25:54,021 INFO L226 Difference]: Without dead ends: 77030 [2021-10-07 15:25:54,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:25:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77030 states. [2021-10-07 15:25:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77030 to 45690. [2021-10-07 15:25:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45690 states, 45689 states have (on average 7.517454967278776) internal successors, (343465), 45689 states have internal predecessors, (343465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45690 states to 45690 states and 343465 transitions. [2021-10-07 15:25:58,034 INFO L78 Accepts]: Start accepts. Automaton has 45690 states and 343465 transitions. Word has length 34 [2021-10-07 15:25:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:58,035 INFO L470 AbstractCegarLoop]: Abstraction has 45690 states and 343465 transitions. [2021-10-07 15:25:58,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states and 343465 transitions. [2021-10-07 15:25:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:25:58,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:58,260 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:58,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:58,461 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:25:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1551558990, now seen corresponding path program 3 times [2021-10-07 15:25:58,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:58,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609139885] [2021-10-07 15:25:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:25:58,463 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:58,465 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:58,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-07 15:25:59,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:25:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:25:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:59,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:59,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:59,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609139885] [2021-10-07 15:25:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609139885] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:59,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:25:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311892118] [2021-10-07 15:25:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:25:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:25:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:25:59,835 INFO L87 Difference]: Start difference. First operand 45690 states and 343465 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:04,584 INFO L93 Difference]: Finished difference Result 93734 states and 693421 transitions. [2021-10-07 15:26:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:26:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-10-07 15:26:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:06,300 INFO L225 Difference]: With dead ends: 93734 [2021-10-07 15:26:06,300 INFO L226 Difference]: Without dead ends: 93734 [2021-10-07 15:26:06,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:26:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93734 states. [2021-10-07 15:26:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93734 to 65620. [2021-10-07 15:26:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65620 states, 65619 states have (on average 7.758179795486064) internal successors, (509084), 65619 states have internal predecessors, (509084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65620 states to 65620 states and 509084 transitions. [2021-10-07 15:26:12,378 INFO L78 Accepts]: Start accepts. Automaton has 65620 states and 509084 transitions. Word has length 34 [2021-10-07 15:26:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:12,379 INFO L470 AbstractCegarLoop]: Abstraction has 65620 states and 509084 transitions. [2021-10-07 15:26:12,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 65620 states and 509084 transitions. [2021-10-07 15:26:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:26:12,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:12,763 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:12,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-07 15:26:12,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:12,964 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:26:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -780120012, now seen corresponding path program 4 times [2021-10-07 15:26:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:12,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861806288] [2021-10-07 15:26:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:26:12,967 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:12,968 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:12,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-07 15:26:13,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:26:13,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:26:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:13,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:14,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:14,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861806288] [2021-10-07 15:26:14,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861806288] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:14,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:14,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:26:14,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334221345] [2021-10-07 15:26:14,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:26:14,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:26:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:26:14,171 INFO L87 Difference]: Start difference. First operand 65620 states and 509084 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:21,097 INFO L93 Difference]: Finished difference Result 112622 states and 820390 transitions. [2021-10-07 15:26:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:26:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-10-07 15:26:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:23,180 INFO L225 Difference]: With dead ends: 112622 [2021-10-07 15:26:23,180 INFO L226 Difference]: Without dead ends: 112622 [2021-10-07 15:26:23,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:26:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112622 states. [2021-10-07 15:26:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112622 to 63470. [2021-10-07 15:26:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63470 states, 63469 states have (on average 7.724400888622792) internal successors, (490260), 63469 states have internal predecessors, (490260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63470 states to 63470 states and 490260 transitions. [2021-10-07 15:26:30,077 INFO L78 Accepts]: Start accepts. Automaton has 63470 states and 490260 transitions. Word has length 34 [2021-10-07 15:26:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:30,077 INFO L470 AbstractCegarLoop]: Abstraction has 63470 states and 490260 transitions. [2021-10-07 15:26:30,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63470 states and 490260 transitions. [2021-10-07 15:26:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:26:31,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:31,359 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:31,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:31,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:31,572 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:26:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1488050751, now seen corresponding path program 5 times [2021-10-07 15:26:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:31,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87976516] [2021-10-07 15:26:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:26:31,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:31,575 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:31,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-07 15:26:32,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:26:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:26:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:33,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:33,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87976516] [2021-10-07 15:26:33,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87976516] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:33,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:33,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:26:33,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173605758] [2021-10-07 15:26:33,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:26:33,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:26:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:26:33,188 INFO L87 Difference]: Start difference. First operand 63470 states and 490260 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:37,215 INFO L93 Difference]: Finished difference Result 110238 states and 805099 transitions. [2021-10-07 15:26:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:26:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-10-07 15:26:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:39,090 INFO L225 Difference]: With dead ends: 110238 [2021-10-07 15:26:39,090 INFO L226 Difference]: Without dead ends: 110238 [2021-10-07 15:26:39,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:26:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110238 states. [2021-10-07 15:26:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110238 to 63470. [2021-10-07 15:26:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63470 states, 63469 states have (on average 7.724400888622792) internal successors, (490260), 63469 states have internal predecessors, (490260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63470 states to 63470 states and 490260 transitions. [2021-10-07 15:26:45,571 INFO L78 Accepts]: Start accepts. Automaton has 63470 states and 490260 transitions. Word has length 34 [2021-10-07 15:26:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:45,571 INFO L470 AbstractCegarLoop]: Abstraction has 63470 states and 490260 transitions. [2021-10-07 15:26:45,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 63470 states and 490260 transitions. [2021-10-07 15:26:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:26:45,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:45,970 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:45,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:46,171 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:26:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633976, now seen corresponding path program 6 times [2021-10-07 15:26:46,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:46,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270181540] [2021-10-07 15:26:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:26:46,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:46,176 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:46,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-07 15:26:47,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:26:47,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:26:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:47,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:47,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:47,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270181540] [2021-10-07 15:26:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270181540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:47,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:26:47,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568774473] [2021-10-07 15:26:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:26:47,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:26:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:26:47,576 INFO L87 Difference]: Start difference. First operand 63470 states and 490260 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:44,867 INFO L93 Difference]: Finished difference Result 91734 states and 665730 transitions. [2021-10-07 15:27:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:27:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-10-07 15:27:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:46,458 INFO L225 Difference]: With dead ends: 91734 [2021-10-07 15:27:46,459 INFO L226 Difference]: Without dead ends: 91500 [2021-10-07 15:27:46,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4357.6ms TimeCoverageRelationStatistics Valid=64, Invalid=174, Unknown=2, NotChecked=0, Total=240 [2021-10-07 15:27:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91500 states. [2021-10-07 15:27:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91500 to 65900. [2021-10-07 15:27:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65900 states, 65899 states have (on average 7.6784776703743605) internal successors, (506004), 65899 states have internal predecessors, (506004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65900 states to 65900 states and 506004 transitions. [2021-10-07 15:27:51,562 INFO L78 Accepts]: Start accepts. Automaton has 65900 states and 506004 transitions. Word has length 34 [2021-10-07 15:27:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:51,562 INFO L470 AbstractCegarLoop]: Abstraction has 65900 states and 506004 transitions. [2021-10-07 15:27:51,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65900 states and 506004 transitions. [2021-10-07 15:27:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:27:51,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:51,911 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:51,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:52,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:52,112 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:27:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash -47725042, now seen corresponding path program 7 times [2021-10-07 15:27:52,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:52,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55842436] [2021-10-07 15:27:52,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:27:52,114 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:52,115 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-07 15:27:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:27:53,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:27:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:53,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:53,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:53,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55842436] [2021-10-07 15:27:53,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55842436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:53,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:53,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:27:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920086753] [2021-10-07 15:27:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:27:53,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:27:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:27:53,855 INFO L87 Difference]: Start difference. First operand 65900 states and 506004 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:28:02,106 INFO L93 Difference]: Finished difference Result 117210 states and 864739 transitions. [2021-10-07 15:28:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:28:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-10-07 15:28:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:28:04,213 INFO L225 Difference]: With dead ends: 117210 [2021-10-07 15:28:04,213 INFO L226 Difference]: Without dead ends: 117210 [2021-10-07 15:28:04,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:28:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117210 states. [2021-10-07 15:28:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117210 to 68274. [2021-10-07 15:28:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68274 states, 68273 states have (on average 7.740087589530268) internal successors, (528439), 68273 states have internal predecessors, (528439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68274 states to 68274 states and 528439 transitions. [2021-10-07 15:28:11,096 INFO L78 Accepts]: Start accepts. Automaton has 68274 states and 528439 transitions. Word has length 34 [2021-10-07 15:28:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:28:11,098 INFO L470 AbstractCegarLoop]: Abstraction has 68274 states and 528439 transitions. [2021-10-07 15:28:11,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 68274 states and 528439 transitions. [2021-10-07 15:28:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:28:11,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:28:11,740 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:28:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-07 15:28:11,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:28:11,953 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:28:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:28:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1541415287, now seen corresponding path program 8 times [2021-10-07 15:28:11,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:28:11,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888759854] [2021-10-07 15:28:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:28:11,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:28:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:28:11,956 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:28:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-07 15:28:13,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:28:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:28:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:28:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:28:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:28:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:14,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:28:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888759854] [2021-10-07 15:28:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888759854] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:28:14,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:28:14,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:28:14,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585219349] [2021-10-07 15:28:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:28:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:28:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:28:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:28:14,843 INFO L87 Difference]: Start difference. First operand 68274 states and 528439 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:28:21,469 INFO L93 Difference]: Finished difference Result 128578 states and 950302 transitions. [2021-10-07 15:28:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:28:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-10-07 15:28:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:28:23,667 INFO L225 Difference]: With dead ends: 128578 [2021-10-07 15:28:23,668 INFO L226 Difference]: Without dead ends: 128578 [2021-10-07 15:28:23,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 698.5ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:28:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128578 states. [2021-10-07 15:28:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128578 to 68028. [2021-10-07 15:28:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68028 states, 68027 states have (on average 7.709732900171991) internal successors, (524470), 68027 states have internal predecessors, (524470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68028 states to 68028 states and 524470 transitions. [2021-10-07 15:28:30,577 INFO L78 Accepts]: Start accepts. Automaton has 68028 states and 524470 transitions. Word has length 34 [2021-10-07 15:28:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:28:30,577 INFO L470 AbstractCegarLoop]: Abstraction has 68028 states and 524470 transitions. [2021-10-07 15:28:30,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 68028 states and 524470 transitions. [2021-10-07 15:28:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:28:30,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:28:30,943 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:28:30,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-07 15:28:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:28:31,159 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:28:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:28:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1113239006, now seen corresponding path program 9 times [2021-10-07 15:28:31,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:28:31,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014698061] [2021-10-07 15:28:31,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:28:31,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:28:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:28:31,162 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:28:31,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-07 15:28:32,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:28:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:28:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:28:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:28:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:28:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:33,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:28:33,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014698061] [2021-10-07 15:28:33,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014698061] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:28:33,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:28:33,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:28:33,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445911418] [2021-10-07 15:28:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:28:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:28:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:28:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:28:33,259 INFO L87 Difference]: Start difference. First operand 68028 states and 524470 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:32,936 INFO L93 Difference]: Finished difference Result 156856 states and 1110753 transitions. [2021-10-07 15:29:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:29:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-10-07 15:29:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:35,673 INFO L225 Difference]: With dead ends: 156856 [2021-10-07 15:29:35,673 INFO L226 Difference]: Without dead ends: 156784 [2021-10-07 15:29:35,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2410.1ms TimeCoverageRelationStatistics Valid=60, Invalid=149, Unknown=1, NotChecked=0, Total=210 [2021-10-07 15:29:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156784 states. [2021-10-07 15:29:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156784 to 80794. [2021-10-07 15:29:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80794 states, 80793 states have (on average 7.758419665069994) internal successors, (626826), 80793 states have internal predecessors, (626826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80794 states to 80794 states and 626826 transitions. [2021-10-07 15:29:44,547 INFO L78 Accepts]: Start accepts. Automaton has 80794 states and 626826 transitions. Word has length 34 [2021-10-07 15:29:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 80794 states and 626826 transitions. [2021-10-07 15:29:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 80794 states and 626826 transitions. [2021-10-07 15:29:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:29:45,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:45,003 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:45,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:45,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:45,204 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:29:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1546091875, now seen corresponding path program 10 times [2021-10-07 15:29:45,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:45,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030639561] [2021-10-07 15:29:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:29:45,208 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:45,209 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:45,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-07 15:29:46,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:29:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:29:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:46,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:47,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:47,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030639561] [2021-10-07 15:29:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030639561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:47,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:47,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-07 15:29:47,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112922739] [2021-10-07 15:29:47,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:29:47,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:29:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:29:47,397 INFO L87 Difference]: Start difference. First operand 80794 states and 626826 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:54,994 INFO L93 Difference]: Finished difference Result 181018 states and 1357363 transitions. [2021-10-07 15:29:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:29:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-10-07 15:29:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:59,912 INFO L225 Difference]: With dead ends: 181018 [2021-10-07 15:29:59,913 INFO L226 Difference]: Without dead ends: 181018 [2021-10-07 15:29:59,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:30:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181018 states. [2021-10-07 15:30:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181018 to 101578. [2021-10-07 15:30:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101578 states, 101577 states have (on average 7.984474831900923) internal successors, (811039), 101577 states have internal predecessors, (811039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:30:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101578 states to 101578 states and 811039 transitions. [2021-10-07 15:30:11,534 INFO L78 Accepts]: Start accepts. Automaton has 101578 states and 811039 transitions. Word has length 34 [2021-10-07 15:30:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:30:11,534 INFO L470 AbstractCegarLoop]: Abstraction has 101578 states and 811039 transitions. [2021-10-07 15:30:11,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:30:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101578 states and 811039 transitions. [2021-10-07 15:30:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:30:12,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:30:12,892 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:30:12,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-07 15:30:13,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:30:13,107 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:30:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:30:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash 215566478, now seen corresponding path program 11 times [2021-10-07 15:30:13,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:30:13,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358180413] [2021-10-07 15:30:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:30:13,108 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:30:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:30:13,109 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:30:13,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-07 15:30:14,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:30:14,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:30:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:30:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:30:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:30:14,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:30:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:30:14,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:30:14,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358180413] [2021-10-07 15:30:14,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358180413] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:30:14,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:30:14,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:30:14,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310818278] [2021-10-07 15:30:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:30:14,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:30:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:30:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:30:14,918 INFO L87 Difference]: Start difference. First operand 101578 states and 811039 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:30:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:30:21,032 INFO L93 Difference]: Finished difference Result 154236 states and 1174681 transitions. [2021-10-07 15:30:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:30:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-10-07 15:30:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:30:23,752 INFO L225 Difference]: With dead ends: 154236 [2021-10-07 15:30:23,753 INFO L226 Difference]: Without dead ends: 154152 [2021-10-07 15:30:23,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:30:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154152 states. [2021-10-07 15:30:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154152 to 114588. [2021-10-07 15:30:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114588 states, 114587 states have (on average 7.890502413013692) internal successors, (904149), 114587 states have internal predecessors, (904149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:30:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114588 states to 114588 states and 904149 transitions. [2021-10-07 15:30:35,605 INFO L78 Accepts]: Start accepts. Automaton has 114588 states and 904149 transitions. Word has length 34 [2021-10-07 15:30:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:30:35,605 INFO L470 AbstractCegarLoop]: Abstraction has 114588 states and 904149 transitions. [2021-10-07 15:30:35,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:30:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 114588 states and 904149 transitions. [2021-10-07 15:30:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-07 15:30:37,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:30:37,037 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:30:37,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-07 15:30:37,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:30:37,252 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 28 more)] === [2021-10-07 15:30:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:30:37,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1511118648, now seen corresponding path program 12 times [2021-10-07 15:30:37,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:30:37,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529024013] [2021-10-07 15:30:37,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:30:37,253 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:30:37,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:30:37,255 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:30:37,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-07 15:30:38,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:30:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:30:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:30:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:30:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:30:38,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:30:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:30:38,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:30:38,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529024013] [2021-10-07 15:30:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529024013] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:30:38,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:30:38,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:30:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485659739] [2021-10-07 15:30:38,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:30:38,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:30:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:30:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:30:38,840 INFO L87 Difference]: Start difference. First operand 114588 states and 904149 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)