/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-exp2x9.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:20:57,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:20:57,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:20:57,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 15:20:57,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:20:57,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:20:57,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:20:57,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:20:57,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:20:57,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:20:57,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:20:57,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:20:57,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:20:57,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:20:57,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:20:57,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:20:57,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 15:20:57,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 15:20:57,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 15:20:57,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 15:20:57,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 15:20:57,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 15:20:57,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 15:20:57,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 15:20:57,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 15:20:57,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:20:57,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:20:57,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:20:57,337 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 15:20:57,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:20:57,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:20:57,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:20:57,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:20:57,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:20:57,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:20:57,376 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:20:57,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:20:57,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:20:57,377 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:20:57,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:20:57,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:20:57,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:20:57,378 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:20:57,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:20:57,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:20:57,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:20:57,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:20:57,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:20:57,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:20:57,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:20:57,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:20:57,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:20:57,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:20:57,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:20:57,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:57,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:20:57,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:20:57,382 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:20:57,382 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:20:57,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:20:57,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:20:57,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:20:57,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:20:57,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:20:57,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:20:57,876 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:20:57,877 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:20:57,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-10-07 15:20:57,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1da45956d/5f417be3401f480494aa0f9bc384fb74/FLAG7dd185b8e [2021-10-07 15:20:58,627 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:20:58,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-10-07 15:20:58,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1da45956d/5f417be3401f480494aa0f9bc384fb74/FLAG7dd185b8e [2021-10-07 15:20:58,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1da45956d/5f417be3401f480494aa0f9bc384fb74 [2021-10-07 15:20:58,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:20:59,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:20:59,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:59,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:20:59,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:20:59,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:58" (1/1) ... [2021-10-07 15:20:59,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ab2ee5 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 15:20:59,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:20:58" (1/1) ... [2021-10-07 15:20:59,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:20:59,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:20:59,259 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-exp2x9.wvr.c[2663,2676] [2021-10-07 15:20:59,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,299 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:20:59,368 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-exp2x9.wvr.c[2663,2676] [2021-10-07 15:20:59,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:20:59,416 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:20:59,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:20:59 WrapperNode [2021-10-07 15:20:59,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:20:59,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:20:59,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:20:59,436 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 15:20:59,466 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 15:20:59,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:20:59,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:20:59,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:20:59,530 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 15:20:59,530 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 15:20:59,543 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 15:20:59,544 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 15:20:59,560 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 15:20:59,569 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 15:20:59,573 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 15:20:59,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:20:59,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:20:59,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:20:59,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:20:59,587 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 15:20:59,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:20:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:59,635 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 15:20:59,654 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 15:20:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:20:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:20:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:20:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:20:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 15:20:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 15:20:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:20:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-07 15:20:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-07 15:20:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:20:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:20:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:20:59,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:20:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:20:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:20:59,712 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 15:21:00,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:21:00,354 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-07 15:21:00,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:21:00 BoogieIcfgContainer [2021-10-07 15:21:00,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:21:00,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:21:00,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:21:00,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:21:00,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:20:58" (1/3) ... [2021-10-07 15:21:00,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbe89e6 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 15:21:00,364 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 15:21:00,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbe89e6 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 15:21:00,365 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 15:21:00,366 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2021-10-07 15:21:00,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:21:00,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-07 15:21:00,374 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:21:00,452 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,456 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,456 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,457 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,458 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,458 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,458 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,459 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,460 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,463 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,463 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,464 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,465 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,465 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,465 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,465 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,477 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,477 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,485 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,485 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,494 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,495 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:21:00,514 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-07 15:21:00,585 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:21:00,602 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 15:21:00,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-07 15:21:00,653 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:21:00,670 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 161 transitions, 354 flow [2021-10-07 15:21:00,674 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 161 transitions, 354 flow [2021-10-07 15:21:00,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 161 transitions, 354 flow [2021-10-07 15:21:00,809 INFO L129 PetriNetUnfolder]: 10/157 cut-off events. [2021-10-07 15:21:00,810 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-07 15:21:00,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 157 events. 10/157 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2021-10-07 15:21:00,826 INFO L116 LiptonReduction]: Number of co-enabled transitions 4080 [2021-10-07 15:21:17,917 INFO L131 LiptonReduction]: Checked pairs total: 4077 [2021-10-07 15:21:17,918 INFO L133 LiptonReduction]: Total number of compositions: 156 [2021-10-07 15:21:17,929 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2021-10-07 15:21:17,957 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-07 15:21:17,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:17,967 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-07 15:21:17,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash 601, now seen corresponding path program 1 times [2021-10-07 15:21:17,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:17,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323724853] [2021-10-07 15:21:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:17,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:17,994 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 15:21:18,027 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 15:21:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-07 15:21:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:18,087 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 15:21:18,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:18,088 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 15:21:18,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:18,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323724853] [2021-10-07 15:21:18,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323724853] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:18,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:18,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-07 15:21:18,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127101055] [2021-10-07 15:21:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-07 15:21:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-07 15:21:18,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-07 15:21:18,166 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 15:21:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:18,220 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2021-10-07 15:21:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-07 15:21:18,233 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 15:21:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:18,252 INFO L225 Difference]: With dead ends: 180 [2021-10-07 15:21:18,252 INFO L226 Difference]: Without dead ends: 180 [2021-10-07 15:21:18,254 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 15:21:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-07 15:21:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-10-07 15:21:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2021-10-07 15:21:18,320 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2021-10-07 15:21:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2021-10-07 15:21:18,321 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 15:21:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2021-10-07 15:21:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:18,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:18,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:18,332 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 15:21:18,526 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 15:21:18,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash 589823, now seen corresponding path program 1 times [2021-10-07 15:21:18,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:18,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694360145] [2021-10-07 15:21:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:18,531 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:18,532 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 15:21:18,534 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 15:21:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:21:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:18,955 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-07 15:21:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 75 [2021-10-07 15:21:18,974 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 77 treesize of output 75 [2021-10-07 15:21:19,309 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 15:21:19,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:19,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:19,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694360145] [2021-10-07 15:21:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694360145] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:19,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:19,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156699240] [2021-10-07 15:21:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:19,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:19,378 INFO L87 Difference]: Start difference. First operand 180 states and 692 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 15:21:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:19,495 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2021-10-07 15:21:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:19,496 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 15:21:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:19,500 INFO L225 Difference]: With dead ends: 170 [2021-10-07 15:21:19,500 INFO L226 Difference]: Without dead ends: 170 [2021-10-07 15:21:19,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-07 15:21:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-07 15:21:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2021-10-07 15:21:19,521 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2021-10-07 15:21:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:19,522 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2021-10-07 15:21:19,522 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 15:21:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2021-10-07 15:21:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:21:19,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:19,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:21:19,535 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 15:21:19,735 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 15:21:19,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash 589822, now seen corresponding path program 1 times [2021-10-07 15:21:19,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:19,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096539908] [2021-10-07 15:21:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:19,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:19,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:19,741 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 15:21:19,743 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 15:21:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:19,878 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 15:21:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2021-10-07 15:21:20,033 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 15:21:20,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:20,051 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 15:21:20,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:20,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096539908] [2021-10-07 15:21:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096539908] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:20,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:20,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:20,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179386630] [2021-10-07 15:21:20,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:20,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:20,054 INFO L87 Difference]: Start difference. First operand 170 states and 656 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 15:21:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:20,111 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2021-10-07 15:21:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:20,112 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 15:21:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:20,115 INFO L225 Difference]: With dead ends: 160 [2021-10-07 15:21:20,115 INFO L226 Difference]: Without dead ends: 160 [2021-10-07 15:21:20,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-07 15:21:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-10-07 15:21:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2021-10-07 15:21:20,131 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2021-10-07 15:21:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:20,131 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2021-10-07 15:21:20,131 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 15:21:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2021-10-07 15:21:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:21:20,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:20,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:21:20,145 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 15:21:20,344 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 15:21:20,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 566833960, now seen corresponding path program 1 times [2021-10-07 15:21:20,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:20,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382834568] [2021-10-07 15:21:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:20,347 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:20,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:20,348 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 15:21:20,378 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 15:21:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:20,664 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-07 15:21:20,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-07 15:21:20,773 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 15:21:20,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:20,846 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 15:21:20,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:20,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382834568] [2021-10-07 15:21:20,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382834568] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:20,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:20,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:20,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773532035] [2021-10-07 15:21:20,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:20,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:20,849 INFO L87 Difference]: Start difference. First operand 160 states and 620 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 15:21:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:20,898 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2021-10-07 15:21:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:20,899 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 15:21:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:20,901 INFO L225 Difference]: With dead ends: 152 [2021-10-07 15:21:20,901 INFO L226 Difference]: Without dead ends: 152 [2021-10-07 15:21:20,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-07 15:21:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-07 15:21:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2021-10-07 15:21:20,913 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2021-10-07 15:21:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:20,913 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2021-10-07 15:21:20,914 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 15:21:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2021-10-07 15:21:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:21:20,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:20,915 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:21:20,930 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 15:21:21,126 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 15:21:21,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 566833961, now seen corresponding path program 1 times [2021-10-07 15:21:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:21,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317900214] [2021-10-07 15:21:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:21,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:21,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:21,132 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 15:21:21,168 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 15:21:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:21:21,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:21,272 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 15:21:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 15:21:21,311 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 15:21:21,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:21,327 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 15:21:21,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:21,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317900214] [2021-10-07 15:21:21,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317900214] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:21,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:21,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:21:21,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329757669] [2021-10-07 15:21:21,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:21:21,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:21:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:21,330 INFO L87 Difference]: Start difference. First operand 152 states and 596 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:21,373 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2021-10-07 15:21:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:21:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:21,377 INFO L225 Difference]: With dead ends: 144 [2021-10-07 15:21:21,377 INFO L226 Difference]: Without dead ends: 144 [2021-10-07 15:21:21,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-07 15:21:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-07 15:21:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2021-10-07 15:21:21,386 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2021-10-07 15:21:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:21,386 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2021-10-07 15:21:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2021-10-07 15:21:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:21:21,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:21,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:21,399 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 15:21:21,599 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 15:21:21,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -733398721, now seen corresponding path program 1 times [2021-10-07 15:21:21,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:21,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022447490] [2021-10-07 15:21:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:21,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:21,604 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 15:21:21,605 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 15:21:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:21:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:21,920 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-07 15:21:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-07 15:21:22,039 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 15:21:22,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:22,158 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 15:21:22,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:22,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022447490] [2021-10-07 15:21:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022447490] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:22,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:22,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:22,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657598880] [2021-10-07 15:21:22,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:22,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:22,161 INFO L87 Difference]: Start difference. First operand 144 states and 572 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 15:21:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:22,199 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2021-10-07 15:21:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:22,200 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 15:21:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:22,202 INFO L225 Difference]: With dead ends: 134 [2021-10-07 15:21:22,202 INFO L226 Difference]: Without dead ends: 134 [2021-10-07 15:21:22,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-07 15:21:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-07 15:21:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2021-10-07 15:21:22,211 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2021-10-07 15:21:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2021-10-07 15:21:22,211 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 15:21:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2021-10-07 15:21:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:21:22,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:22,212 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:22,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:22,424 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 15:21:22,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash -733398720, now seen corresponding path program 1 times [2021-10-07 15:21:22,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:22,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815175690] [2021-10-07 15:21:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:22,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:22,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:22,433 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 15:21:22,439 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 15:21:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:21:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:22,556 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 15:21:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 15:21:22,599 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 15:21:22,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:22,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:22,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815175690] [2021-10-07 15:21:22,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815175690] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:22,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:22,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:21:22,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490032036] [2021-10-07 15:21:22,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:21:22,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:21:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:22,624 INFO L87 Difference]: Start difference. First operand 134 states and 536 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:22,659 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2021-10-07 15:21:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 15:21:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:22,662 INFO L225 Difference]: With dead ends: 124 [2021-10-07 15:21:22,662 INFO L226 Difference]: Without dead ends: 124 [2021-10-07 15:21:22,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:21:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-07 15:21:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-07 15:21:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2021-10-07 15:21:22,675 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2021-10-07 15:21:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:22,676 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2021-10-07 15:21:22,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2021-10-07 15:21:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:21:22,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:22,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:22,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-07 15:21:22,889 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 15:21:22,890 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash -421519305, now seen corresponding path program 1 times [2021-10-07 15:21:22,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:22,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035448654] [2021-10-07 15:21:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:22,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:22,893 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 15:21:22,894 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 15:21:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:23,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:23,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:23,232 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-07 15:21:23,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 69 [2021-10-07 15:21:23,240 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 70 treesize of output 68 [2021-10-07 15:21:23,588 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 15:21:23,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:23,840 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 15:21:23,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:23,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035448654] [2021-10-07 15:21:23,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035448654] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:23,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:23,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-07 15:21:23,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605091608] [2021-10-07 15:21:23,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:23,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:23,843 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:21:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:23,897 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2021-10-07 15:21:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:21:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:23,900 INFO L225 Difference]: With dead ends: 108 [2021-10-07 15:21:23,900 INFO L226 Difference]: Without dead ends: 108 [2021-10-07 15:21:23,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-07 15:21:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-07 15:21:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2021-10-07 15:21:23,906 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2021-10-07 15:21:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:23,907 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2021-10-07 15:21:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:21:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2021-10-07 15:21:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:21:23,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:23,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:23,921 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 15:21:24,109 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 15:21:24,112 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash -421519304, now seen corresponding path program 1 times [2021-10-07 15:21:24,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:24,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926321908] [2021-10-07 15:21:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:24,114 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:24,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:24,118 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 15:21:24,121 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 15:21:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:24,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:21:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:24,280 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-07 15:21:24,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-07 15:21:24,402 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 15:21:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:24,480 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 15:21:24,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:24,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926321908] [2021-10-07 15:21:24,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926321908] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:24,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:24,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:24,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318762472] [2021-10-07 15:21:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:21:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:21:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:24,483 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 15:21:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:24,539 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2021-10-07 15:21:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 9 [2021-10-07 15:21:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:24,541 INFO L225 Difference]: With dead ends: 92 [2021-10-07 15:21:24,541 INFO L226 Difference]: Without dead ends: 92 [2021-10-07 15:21:24,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-07 15:21:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-07 15:21:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2021-10-07 15:21:24,547 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2021-10-07 15:21:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:24,547 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2021-10-07 15:21:24,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 15:21:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2021-10-07 15:21:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:21:24,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:24,549 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] [2021-10-07 15:21:24,562 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 15:21:24,762 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 15:21:24,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1399456573, now seen corresponding path program 1 times [2021-10-07 15:21:24,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:24,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304447452] [2021-10-07 15:21:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:24,766 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:24,767 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 15:21:24,768 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 15:21:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:24,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:25,194 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 15:21:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:25,364 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 15:21:25,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:25,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304447452] [2021-10-07 15:21:25,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304447452] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:25,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:25,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:21:25,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534077297] [2021-10-07 15:21:25,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:21:25,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:21:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:25,367 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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 15:21:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:25,401 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2021-10-07 15:21:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:21:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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 21 [2021-10-07 15:21:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:25,404 INFO L225 Difference]: With dead ends: 181 [2021-10-07 15:21:25,404 INFO L226 Difference]: Without dead ends: 172 [2021-10-07 15:21:25,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:21:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-07 15:21:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-10-07 15:21:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2021-10-07 15:21:25,414 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2021-10-07 15:21:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:25,415 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2021-10-07 15:21:25,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 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 15:21:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2021-10-07 15:21:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:25,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:25,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:25,431 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 15:21:25,630 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 15:21:25,631 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash 74808037, now seen corresponding path program 1 times [2021-10-07 15:21:25,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:25,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135018387] [2021-10-07 15:21:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:25,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:25,634 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 15:21:25,635 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 15:21:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:25,878 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 15:21:25,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:25,965 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 15:21:25,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:25,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135018387] [2021-10-07 15:21:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135018387] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:25,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:25,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-07 15:21:25,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116303598] [2021-10-07 15:21:25,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:25,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:25,968 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:26,094 INFO L93 Difference]: Finished difference Result 336 states and 1257 transitions. [2021-10-07 15:21:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:21:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:21:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:26,098 INFO L225 Difference]: With dead ends: 336 [2021-10-07 15:21:26,099 INFO L226 Difference]: Without dead ends: 336 [2021-10-07 15:21:26,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-07 15:21:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 210. [2021-10-07 15:21:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 4.009569377990431) internal successors, (838), 209 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 838 transitions. [2021-10-07 15:21:26,112 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 838 transitions. Word has length 22 [2021-10-07 15:21:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:26,112 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 838 transitions. [2021-10-07 15:21:26,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 838 transitions. [2021-10-07 15:21:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:26,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:26,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:26,126 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 15:21:26,326 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 15:21:26,327 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1889579684, now seen corresponding path program 1 times [2021-10-07 15:21:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:26,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169201967] [2021-10-07 15:21:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:26,330 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:26,331 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 15:21:26,332 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 15:21:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:26,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:21:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:26,636 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 15:21:26,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:26,725 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 15:21:26,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:26,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169201967] [2021-10-07 15:21:26,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169201967] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:26,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:26,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:26,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822870591] [2021-10-07 15:21:26,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:26,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:26,728 INFO L87 Difference]: Start difference. First operand 210 states and 838 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:21:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:26,895 INFO L93 Difference]: Finished difference Result 370 states and 1364 transitions. [2021-10-07 15:21:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:21:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 22 [2021-10-07 15:21:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:26,900 INFO L225 Difference]: With dead ends: 370 [2021-10-07 15:21:26,900 INFO L226 Difference]: Without dead ends: 354 [2021-10-07 15:21:26,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-07 15:21:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 268. [2021-10-07 15:21:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 4.037453183520599) internal successors, (1078), 267 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 1078 transitions. [2021-10-07 15:21:26,916 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 1078 transitions. Word has length 22 [2021-10-07 15:21:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:26,917 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 1078 transitions. [2021-10-07 15:21:26,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:21:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 1078 transitions. [2021-10-07 15:21:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:26,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:26,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:26,937 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 15:21:27,131 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 15:21:27,132 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 872928158, now seen corresponding path program 2 times [2021-10-07 15:21:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:27,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561966006] [2021-10-07 15:21:27,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:21:27,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:27,135 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 15:21:27,136 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 15:21:27,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:21:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:27,453 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 15:21:27,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:27,544 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 15:21:27,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:27,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561966006] [2021-10-07 15:21:27,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561966006] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:27,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:27,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:27,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715713378] [2021-10-07 15:21:27,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:27,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:27,549 INFO L87 Difference]: Start difference. First operand 268 states and 1078 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:21:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:27,717 INFO L93 Difference]: Finished difference Result 332 states and 1304 transitions. [2021-10-07 15:21:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:21:27,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 22 [2021-10-07 15:21:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:27,722 INFO L225 Difference]: With dead ends: 332 [2021-10-07 15:21:27,722 INFO L226 Difference]: Without dead ends: 332 [2021-10-07 15:21:27,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-07 15:21:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 310. [2021-10-07 15:21:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 4.077669902912621) internal successors, (1260), 309 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1260 transitions. [2021-10-07 15:21:27,742 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1260 transitions. Word has length 22 [2021-10-07 15:21:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:27,743 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1260 transitions. [2021-10-07 15:21:27,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:21:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1260 transitions. [2021-10-07 15:21:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:27,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:27,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:27,758 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 15:21:27,961 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 15:21:27,961 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 17621504, now seen corresponding path program 1 times [2021-10-07 15:21:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:27,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537138161] [2021-10-07 15:21:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:27,964 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:27,965 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 15:21:27,966 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 15:21:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:28,297 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 15:21:28,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:28,387 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 15:21:28,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:28,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537138161] [2021-10-07 15:21:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537138161] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:28,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-07 15:21:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101194241] [2021-10-07 15:21:28,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:28,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:28,391 INFO L87 Difference]: Start difference. First operand 310 states and 1260 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:28,551 INFO L93 Difference]: Finished difference Result 372 states and 1482 transitions. [2021-10-07 15:21:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:21:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:21:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:28,556 INFO L225 Difference]: With dead ends: 372 [2021-10-07 15:21:28,556 INFO L226 Difference]: Without dead ends: 372 [2021-10-07 15:21:28,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-10-07 15:21:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 350. [2021-10-07 15:21:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 4.1203438395415475) internal successors, (1438), 349 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1438 transitions. [2021-10-07 15:21:28,586 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1438 transitions. Word has length 22 [2021-10-07 15:21:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:28,587 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1438 transitions. [2021-10-07 15:21:28,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1438 transitions. [2021-10-07 15:21:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:28,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:28,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:28,607 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 15:21:28,802 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 15:21:28,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1631754596, now seen corresponding path program 1 times [2021-10-07 15:21:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:28,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491527010] [2021-10-07 15:21:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:28,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:28,807 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 15:21:28,810 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 15:21:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:29,062 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 15:21:29,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:29,120 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 15:21:29,121 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:29,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491527010] [2021-10-07 15:21:29,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491527010] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:29,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:29,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:29,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935128320] [2021-10-07 15:21:29,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:29,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:29,124 INFO L87 Difference]: Start difference. First operand 350 states and 1438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:29,260 INFO L93 Difference]: Finished difference Result 614 states and 2247 transitions. [2021-10-07 15:21:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:21:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:21:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:29,270 INFO L225 Difference]: With dead ends: 614 [2021-10-07 15:21:29,270 INFO L226 Difference]: Without dead ends: 592 [2021-10-07 15:21:29,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-10-07 15:21:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 392. [2021-10-07 15:21:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.9872122762148337) internal successors, (1559), 391 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1559 transitions. [2021-10-07 15:21:29,296 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1559 transitions. Word has length 22 [2021-10-07 15:21:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:29,297 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1559 transitions. [2021-10-07 15:21:29,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1559 transitions. [2021-10-07 15:21:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:21:29,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:29,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:29,314 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 15:21:29,512 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 15:21:29,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1378558274, now seen corresponding path program 2 times [2021-10-07 15:21:29,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:29,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093439037] [2021-10-07 15:21:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:21:29,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:29,516 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 15:21:29,517 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 15:21:29,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:21:29,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 15:21:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:29,807 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 15:21:29,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:29,878 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 15:21:29,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:29,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093439037] [2021-10-07 15:21:29,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093439037] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:21:29,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:21:29,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:21:29,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110748889] [2021-10-07 15:21:29,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:21:29,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:29,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:21:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:21:29,882 INFO L87 Difference]: Start difference. First operand 392 states and 1559 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:30,047 INFO L93 Difference]: Finished difference Result 538 states and 2079 transitions. [2021-10-07 15:21:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:21:30,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:21:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:30,053 INFO L225 Difference]: With dead ends: 538 [2021-10-07 15:21:30,053 INFO L226 Difference]: Without dead ends: 538 [2021-10-07 15:21:30,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:21:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-07 15:21:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 478. [2021-10-07 15:21:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 4.027253668763103) internal successors, (1921), 477 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1921 transitions. [2021-10-07 15:21:30,078 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1921 transitions. Word has length 22 [2021-10-07 15:21:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1921 transitions. [2021-10-07 15:21:30,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1921 transitions. [2021-10-07 15:21:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:21:30,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:30,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:30,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-07 15:21:30,295 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 15:21:30,296 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 89317250, now seen corresponding path program 1 times [2021-10-07 15:21:30,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:30,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335357975] [2021-10-07 15:21:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:30,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:30,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:30,298 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 15:21:30,336 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 15:21:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:31,015 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 15:21:31,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:31,237 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 15:21:31,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:31,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335357975] [2021-10-07 15:21:31,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335357975] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:31,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:31,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:21:31,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667471611] [2021-10-07 15:21:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:31,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:31,240 INFO L87 Difference]: Start difference. First operand 478 states and 1921 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:31,448 INFO L93 Difference]: Finished difference Result 762 states and 2927 transitions. [2021-10-07 15:21:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:21:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:21:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:31,456 INFO L225 Difference]: With dead ends: 762 [2021-10-07 15:21:31,456 INFO L226 Difference]: Without dead ends: 712 [2021-10-07 15:21:31,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-10-07 15:21:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 562. [2021-10-07 15:21:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 4.133689839572193) internal successors, (2319), 561 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 2319 transitions. [2021-10-07 15:21:31,484 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 2319 transitions. Word has length 23 [2021-10-07 15:21:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:31,484 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 2319 transitions. [2021-10-07 15:21:31,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 2319 transitions. [2021-10-07 15:21:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:21:31,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:31,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:31,501 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 15:21:31,702 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 15:21:31,702 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:31,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1986642481, now seen corresponding path program 1 times [2021-10-07 15:21:31,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:31,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104662501] [2021-10-07 15:21:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:21:31,703 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:31,704 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 15:21:31,705 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 15:21:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:32,329 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 15:21:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:32,584 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 15:21:32,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104662501] [2021-10-07 15:21:32,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104662501] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:32,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:32,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:21:32,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812717546] [2021-10-07 15:21:32,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:32,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:32,587 INFO L87 Difference]: Start difference. First operand 562 states and 2319 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:32,843 INFO L93 Difference]: Finished difference Result 802 states and 3158 transitions. [2021-10-07 15:21:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:21:32,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:21:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:32,853 INFO L225 Difference]: With dead ends: 802 [2021-10-07 15:21:32,853 INFO L226 Difference]: Without dead ends: 772 [2021-10-07 15:21:32,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-10-07 15:21:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 668. [2021-10-07 15:21:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 4.130434782608695) internal successors, (2755), 667 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2755 transitions. [2021-10-07 15:21:32,886 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2755 transitions. Word has length 23 [2021-10-07 15:21:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:32,887 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2755 transitions. [2021-10-07 15:21:32,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2755 transitions. [2021-10-07 15:21:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:21:32,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:32,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:32,906 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 15:21:33,103 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 15:21:33,104 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1591227151, now seen corresponding path program 2 times [2021-10-07 15:21:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:33,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059257248] [2021-10-07 15:21:33,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:21:33,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:33,108 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 15:21:33,110 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 15:21:33,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:21:33,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:33,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:33,822 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 15:21:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:34,078 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 15:21:34,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:34,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059257248] [2021-10-07 15:21:34,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059257248] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:34,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:34,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:21:34,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230705191] [2021-10-07 15:21:34,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:34,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:34,081 INFO L87 Difference]: Start difference. First operand 668 states and 2755 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:34,452 INFO L93 Difference]: Finished difference Result 880 states and 3511 transitions. [2021-10-07 15:21:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:21:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:21:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:34,462 INFO L225 Difference]: With dead ends: 880 [2021-10-07 15:21:34,462 INFO L226 Difference]: Without dead ends: 850 [2021-10-07 15:21:34,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-10-07 15:21:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 738. [2021-10-07 15:21:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 4.166892808683853) internal successors, (3071), 737 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 3071 transitions. [2021-10-07 15:21:34,499 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 3071 transitions. Word has length 23 [2021-10-07 15:21:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:34,499 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 3071 transitions. [2021-10-07 15:21:34,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 3071 transitions. [2021-10-07 15:21:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:21:34,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:34,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:21:34,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:21:34,722 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 15:21:34,722 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 293922374, now seen corresponding path program 2 times [2021-10-07 15:21:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:34,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925596630] [2021-10-07 15:21:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:21:34,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:34,726 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 15:21:34,740 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 15:21:35,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:21:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:35,566 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 15:21:35,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:35,794 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 15:21:35,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:35,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925596630] [2021-10-07 15:21:35,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925596630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:35,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:35,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 15:21:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693227842] [2021-10-07 15:21:35,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:21:35,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:21:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:35,797 INFO L87 Difference]: Start difference. First operand 738 states and 3071 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:36,009 INFO L93 Difference]: Finished difference Result 1034 states and 4113 transitions. [2021-10-07 15:21:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:21:36,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:21:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:36,020 INFO L225 Difference]: With dead ends: 1034 [2021-10-07 15:21:36,020 INFO L226 Difference]: Without dead ends: 984 [2021-10-07 15:21:36,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:21:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-10-07 15:21:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 828. [2021-10-07 15:21:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 4.194679564691657) internal successors, (3469), 827 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 3469 transitions. [2021-10-07 15:21:36,056 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 3469 transitions. Word has length 23 [2021-10-07 15:21:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:36,056 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 3469 transitions. [2021-10-07 15:21:36,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 3469 transitions. [2021-10-07 15:21:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:36,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:36,060 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] [2021-10-07 15:21:36,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-07 15:21:36,273 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 15:21:36,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:36,274 INFO L82 PathProgramCache]: Analyzing trace with hash -481600220, now seen corresponding path program 3 times [2021-10-07 15:21:36,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:36,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163715589] [2021-10-07 15:21:36,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:21:36,276 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:36,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:36,277 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 15:21:36,278 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 15:21:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:21:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:36,773 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 15:21:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:36,916 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 15:21:36,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:36,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163715589] [2021-10-07 15:21:36,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163715589] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:36,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:36,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:36,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162759530] [2021-10-07 15:21:36,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:36,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:36,918 INFO L87 Difference]: Start difference. First operand 828 states and 3469 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:37,843 INFO L93 Difference]: Finished difference Result 1748 states and 6963 transitions. [2021-10-07 15:21:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:21:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:21:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:37,862 INFO L225 Difference]: With dead ends: 1748 [2021-10-07 15:21:37,863 INFO L226 Difference]: Without dead ends: 1748 [2021-10-07 15:21:37,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:21:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-10-07 15:21:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1028. [2021-10-07 15:21:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 4.446932814021421) internal successors, (4567), 1027 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 4567 transitions. [2021-10-07 15:21:37,919 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 4567 transitions. Word has length 24 [2021-10-07 15:21:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:37,920 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 4567 transitions. [2021-10-07 15:21:37,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 4567 transitions. [2021-10-07 15:21:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:37,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:37,925 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] [2021-10-07 15:21:37,942 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 15:21:38,138 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 15:21:38,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash 539102853, now seen corresponding path program 4 times [2021-10-07 15:21:38,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:38,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167007424] [2021-10-07 15:21:38,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:21:38,141 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:38,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:38,142 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 15:21:38,155 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 15:21:38,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:21:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:38,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:38,604 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 15:21:38,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:38,751 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 15:21:38,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:38,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167007424] [2021-10-07 15:21:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167007424] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:38,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:38,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:38,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657246019] [2021-10-07 15:21:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:38,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:38,754 INFO L87 Difference]: Start difference. First operand 1028 states and 4567 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:44,776 INFO L93 Difference]: Finished difference Result 1740 states and 6789 transitions. [2021-10-07 15:21:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:21:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:21:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:44,793 INFO L225 Difference]: With dead ends: 1740 [2021-10-07 15:21:44,793 INFO L226 Difference]: Without dead ends: 1716 [2021-10-07 15:21:44,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:21:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-10-07 15:21:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1086. [2021-10-07 15:21:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 4.395391705069124) internal successors, (4769), 1085 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4769 transitions. [2021-10-07 15:21:44,847 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4769 transitions. Word has length 24 [2021-10-07 15:21:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 4769 transitions. [2021-10-07 15:21:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4769 transitions. [2021-10-07 15:21:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:44,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:44,853 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] [2021-10-07 15:21:44,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-07 15:21:45,066 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 15:21:45,066 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash -276995096, now seen corresponding path program 5 times [2021-10-07 15:21:45,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:45,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318176253] [2021-10-07 15:21:45,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:21:45,069 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:45,070 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 15:21:45,071 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 15:21:45,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:21:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:21:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:45,510 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 15:21:45,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:21:45,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:45,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318176253] [2021-10-07 15:21:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318176253] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:45,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:45,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:45,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895453867] [2021-10-07 15:21:45,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:45,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:45,709 INFO L87 Difference]: Start difference. First operand 1086 states and 4769 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:46,944 INFO L93 Difference]: Finished difference Result 2134 states and 8298 transitions. [2021-10-07 15:21:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:21:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:21:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:46,963 INFO L225 Difference]: With dead ends: 2134 [2021-10-07 15:21:46,963 INFO L226 Difference]: Without dead ends: 2126 [2021-10-07 15:21:46,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:21:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-10-07 15:21:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1052. [2021-10-07 15:21:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.361560418648906) internal successors, (4584), 1051 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4584 transitions. [2021-10-07 15:21:47,020 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4584 transitions. Word has length 24 [2021-10-07 15:21:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:47,020 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 4584 transitions. [2021-10-07 15:21:47,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4584 transitions. [2021-10-07 15:21:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:47,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:47,026 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] [2021-10-07 15:21:47,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-07 15:21:47,238 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 15:21:47,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1279951463, now seen corresponding path program 6 times [2021-10-07 15:21:47,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:47,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667860973] [2021-10-07 15:21:47,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:21:47,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:47,242 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 15:21:47,243 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 15:21:47,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:21:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:47,769 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 15:21:47,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:47,953 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 15:21:47,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:47,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667860973] [2021-10-07 15:21:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667860973] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:47,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:47,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808132102] [2021-10-07 15:21:47,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:47,956 INFO L87 Difference]: Start difference. First operand 1052 states and 4584 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:48,608 INFO L93 Difference]: Finished difference Result 1624 states and 6330 transitions. [2021-10-07 15:21:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:21:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:21:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:48,634 INFO L225 Difference]: With dead ends: 1624 [2021-10-07 15:21:48,634 INFO L226 Difference]: Without dead ends: 1594 [2021-10-07 15:21:48,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:21:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-10-07 15:21:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1060. [2021-10-07 15:21:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 4.329556185080264) internal successors, (4585), 1059 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 4585 transitions. [2021-10-07 15:21:48,699 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 4585 transitions. Word has length 24 [2021-10-07 15:21:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 4585 transitions. [2021-10-07 15:21:48,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 4585 transitions. [2021-10-07 15:21:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:48,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:48,704 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] [2021-10-07 15:21:48,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-07 15:21:48,917 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 15:21:48,918 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1026755141, now seen corresponding path program 7 times [2021-10-07 15:21:48,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:48,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598616825] [2021-10-07 15:21:48,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:21:48,920 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:48,921 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 15:21:48,922 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 15:21:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:21:49,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:49,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:49,378 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 15:21:49,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:49,526 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 15:21:49,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:49,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598616825] [2021-10-07 15:21:49,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598616825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:49,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:49,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604972885] [2021-10-07 15:21:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:49,528 INFO L87 Difference]: Start difference. First operand 1060 states and 4585 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:21:50,108 INFO L93 Difference]: Finished difference Result 1612 states and 6476 transitions. [2021-10-07 15:21:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:21:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:21:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:21:50,121 INFO L225 Difference]: With dead ends: 1612 [2021-10-07 15:21:50,121 INFO L226 Difference]: Without dead ends: 1612 [2021-10-07 15:21:50,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:21:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-10-07 15:21:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1060. [2021-10-07 15:21:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 4.329556185080264) internal successors, (4585), 1059 states have internal predecessors, (4585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:21:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 4585 transitions. [2021-10-07 15:21:50,179 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 4585 transitions. Word has length 24 [2021-10-07 15:21:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:21:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 4585 transitions. [2021-10-07 15:21:50,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:21:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 4585 transitions. [2021-10-07 15:21:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:21:50,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:21:50,185 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] [2021-10-07 15:21:50,198 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 15:21:50,397 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 15:21:50,398 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:21:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:21:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1455492690, now seen corresponding path program 3 times [2021-10-07 15:21:50,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:21:50,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839259272] [2021-10-07 15:21:50,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:21:50,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:21:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:21:50,401 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 15:21:50,403 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 15:21:50,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:21:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:21:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:21:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:21:50,951 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 15:21:50,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:21:51,120 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 15:21:51,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:21:51,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839259272] [2021-10-07 15:21:51,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839259272] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:21:51,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:21:51,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:21:51,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327120375] [2021-10-07 15:21:51,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:21:51,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:21:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:21:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:21:51,122 INFO L87 Difference]: Start difference. First operand 1060 states and 4585 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:22:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:04,421 INFO L93 Difference]: Finished difference Result 2012 states and 8182 transitions. [2021-10-07 15:22:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:22:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 24 [2021-10-07 15:22:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:04,433 INFO L225 Difference]: With dead ends: 2012 [2021-10-07 15:22:04,433 INFO L226 Difference]: Without dead ends: 1964 [2021-10-07 15:22:04,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:22:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-10-07 15:22:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1380. [2021-10-07 15:22:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 4.506163886874547) internal successors, (6214), 1379 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 6214 transitions. [2021-10-07 15:22:04,508 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 6214 transitions. Word has length 24 [2021-10-07 15:22:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:04,508 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 6214 transitions. [2021-10-07 15:22:04,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 15:22:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 6214 transitions. [2021-10-07 15:22:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:04,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:04,514 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] [2021-10-07 15:22:04,528 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 15:22:04,728 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 15:22:04,728 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1924569802, now seen corresponding path program 4 times [2021-10-07 15:22:04,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:04,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861090179] [2021-10-07 15:22:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:22:04,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:04,731 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 15:22:04,733 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 15:22:05,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:22:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:05,272 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 15:22:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:05,455 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 15:22:05,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:05,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861090179] [2021-10-07 15:22:05,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861090179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:05,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:05,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:05,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159607809] [2021-10-07 15:22:05,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:05,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:05,459 INFO L87 Difference]: Start difference. First operand 1380 states and 6214 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:07,108 INFO L93 Difference]: Finished difference Result 2164 states and 9144 transitions. [2021-10-07 15:22:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:22:07,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:22:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:07,119 INFO L225 Difference]: With dead ends: 2164 [2021-10-07 15:22:07,119 INFO L226 Difference]: Without dead ends: 2164 [2021-10-07 15:22:07,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:22:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-10-07 15:22:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1554. [2021-10-07 15:22:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 4.578879587894398) internal successors, (7111), 1553 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 7111 transitions. [2021-10-07 15:22:07,197 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 7111 transitions. Word has length 24 [2021-10-07 15:22:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 7111 transitions. [2021-10-07 15:22:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 7111 transitions. [2021-10-07 15:22:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:07,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:07,207 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] [2021-10-07 15:22:07,227 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 15:22:07,421 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 15:22:07,421 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1207472138, now seen corresponding path program 5 times [2021-10-07 15:22:07,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:07,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202626415] [2021-10-07 15:22:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:22:07,423 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:07,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:07,425 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 15:22:07,427 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 15:22:07,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:22:07,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:07,946 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 15:22:07,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:08,117 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 15:22:08,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:08,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202626415] [2021-10-07 15:22:08,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202626415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:08,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:08,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:08,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216004355] [2021-10-07 15:22:08,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:08,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:08,120 INFO L87 Difference]: Start difference. First operand 1554 states and 7111 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:08,889 INFO L93 Difference]: Finished difference Result 2312 states and 9621 transitions. [2021-10-07 15:22:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:22:08,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 24 [2021-10-07 15:22:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:08,904 INFO L225 Difference]: With dead ends: 2312 [2021-10-07 15:22:08,904 INFO L226 Difference]: Without dead ends: 2274 [2021-10-07 15:22:08,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:22:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-10-07 15:22:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1630. [2021-10-07 15:22:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 4.608962553713935) internal successors, (7508), 1629 states have internal predecessors, (7508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 7508 transitions. [2021-10-07 15:22:08,986 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 7508 transitions. Word has length 24 [2021-10-07 15:22:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:08,986 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 7508 transitions. [2021-10-07 15:22:08,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 7508 transitions. [2021-10-07 15:22:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:08,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:08,993 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] [2021-10-07 15:22:09,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:09,207 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 15:22:09,207 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1376287204, now seen corresponding path program 6 times [2021-10-07 15:22:09,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:09,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685142602] [2021-10-07 15:22:09,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:22:09,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:09,211 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 15:22:09,248 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 15:22:09,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:22:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:22:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:09,817 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 15:22:09,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:10,144 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 15:22:10,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:10,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685142602] [2021-10-07 15:22:10,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685142602] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:10,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:10,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 15:22:10,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416907733] [2021-10-07 15:22:10,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:22:10,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:22:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:22:10,146 INFO L87 Difference]: Start difference. First operand 1630 states and 7508 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:11,645 INFO L93 Difference]: Finished difference Result 3632 states and 15784 transitions. [2021-10-07 15:22:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:22:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:22:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:11,664 INFO L225 Difference]: With dead ends: 3632 [2021-10-07 15:22:11,664 INFO L226 Difference]: Without dead ends: 3618 [2021-10-07 15:22:11,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:22:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-10-07 15:22:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 1900. [2021-10-07 15:22:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 4.866771985255397) internal successors, (9242), 1899 states have internal predecessors, (9242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 9242 transitions. [2021-10-07 15:22:11,796 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 9242 transitions. Word has length 24 [2021-10-07 15:22:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:11,796 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 9242 transitions. [2021-10-07 15:22:11,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 9242 transitions. [2021-10-07 15:22:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:11,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:11,805 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] [2021-10-07 15:22:11,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:12,019 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 15:22:12,020 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1166605344, now seen corresponding path program 7 times [2021-10-07 15:22:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:12,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808153955] [2021-10-07 15:22:12,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:22:12,021 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:12,022 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 15:22:12,031 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 15:22:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:12,586 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 15:22:12,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:12,761 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 15:22:12,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:12,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808153955] [2021-10-07 15:22:12,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808153955] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:12,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:12,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:12,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105624581] [2021-10-07 15:22:12,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:12,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:12,763 INFO L87 Difference]: Start difference. First operand 1900 states and 9242 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:20,031 INFO L93 Difference]: Finished difference Result 2828 states and 12715 transitions. [2021-10-07 15:22:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:22:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 24 [2021-10-07 15:22:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:20,040 INFO L225 Difference]: With dead ends: 2828 [2021-10-07 15:22:20,040 INFO L226 Difference]: Without dead ends: 2792 [2021-10-07 15:22:20,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:22:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-10-07 15:22:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2138. [2021-10-07 15:22:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 4.928872250818905) internal successors, (10533), 2137 states have internal predecessors, (10533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 10533 transitions. [2021-10-07 15:22:20,134 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 10533 transitions. Word has length 24 [2021-10-07 15:22:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:20,135 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 10533 transitions. [2021-10-07 15:22:20,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 10533 transitions. [2021-10-07 15:22:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:20,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:20,144 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] [2021-10-07 15:22:20,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-07 15:22:20,356 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 15:22:20,357 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 341233678, now seen corresponding path program 8 times [2021-10-07 15:22:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:20,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267368456] [2021-10-07 15:22:20,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:20,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:20,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:20,361 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 15:22:20,362 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 15:22:20,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:20,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:21,060 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 15:22:21,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:21,232 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 15:22:21,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:21,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267368456] [2021-10-07 15:22:21,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267368456] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:21,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:21,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:21,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528581728] [2021-10-07 15:22:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:21,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:21,235 INFO L87 Difference]: Start difference. First operand 2138 states and 10533 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:23,838 INFO L93 Difference]: Finished difference Result 2966 states and 13288 transitions. [2021-10-07 15:22:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:22:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 24 [2021-10-07 15:22:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:23,848 INFO L225 Difference]: With dead ends: 2966 [2021-10-07 15:22:23,848 INFO L226 Difference]: Without dead ends: 2928 [2021-10-07 15:22:23,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:22:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-10-07 15:22:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2196. [2021-10-07 15:22:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 4.948519362186788) internal successors, (10862), 2195 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 10862 transitions. [2021-10-07 15:22:23,976 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 10862 transitions. Word has length 24 [2021-10-07 15:22:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:23,976 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 10862 transitions. [2021-10-07 15:22:23,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 10862 transitions. [2021-10-07 15:22:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:23,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:23,985 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] [2021-10-07 15:22:24,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-07 15:22:24,198 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 15:22:24,199 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2052441632, now seen corresponding path program 9 times [2021-10-07 15:22:24,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:24,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489669664] [2021-10-07 15:22:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:22:24,201 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:24,202 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 15:22:24,203 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 15:22:24,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:22:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:24,832 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 15:22:24,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:25,019 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 15:22:25,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:25,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489669664] [2021-10-07 15:22:25,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489669664] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:25,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:25,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:25,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009119410] [2021-10-07 15:22:25,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:25,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:25,021 INFO L87 Difference]: Start difference. First operand 2196 states and 10862 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:25,566 INFO L93 Difference]: Finished difference Result 2948 states and 13493 transitions. [2021-10-07 15:22:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:22:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 24 [2021-10-07 15:22:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:25,577 INFO L225 Difference]: With dead ends: 2948 [2021-10-07 15:22:25,577 INFO L226 Difference]: Without dead ends: 2948 [2021-10-07 15:22:25,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2021-10-07 15:22:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2196. [2021-10-07 15:22:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 4.948519362186788) internal successors, (10862), 2195 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 10862 transitions. [2021-10-07 15:22:25,660 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 10862 transitions. Word has length 24 [2021-10-07 15:22:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 10862 transitions. [2021-10-07 15:22:25,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:22:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 10862 transitions. [2021-10-07 15:22:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:25,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:25,670 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] [2021-10-07 15:22:25,684 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 15:22:25,884 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 15:22:25,884 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1197134978, now seen corresponding path program 10 times [2021-10-07 15:22:25,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:25,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584086129] [2021-10-07 15:22:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:22:25,886 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:25,887 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 15:22:25,888 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 15:22:26,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:22:26,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:26,496 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 15:22:26,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:26,671 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 15:22:26,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:26,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584086129] [2021-10-07 15:22:26,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584086129] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:26,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:26,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:26,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720942058] [2021-10-07 15:22:26,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:26,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:26,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:26,673 INFO L87 Difference]: Start difference. First operand 2196 states and 10862 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:27,534 INFO L93 Difference]: Finished difference Result 3098 states and 13976 transitions. [2021-10-07 15:22:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:22:27,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:22:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:27,545 INFO L225 Difference]: With dead ends: 3098 [2021-10-07 15:22:27,545 INFO L226 Difference]: Without dead ends: 3086 [2021-10-07 15:22:27,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:22:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2021-10-07 15:22:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2178. [2021-10-07 15:22:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 4.908589802480478) internal successors, (10686), 2177 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 10686 transitions. [2021-10-07 15:22:27,653 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 10686 transitions. Word has length 24 [2021-10-07 15:22:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:27,653 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 10686 transitions. [2021-10-07 15:22:27,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 10686 transitions. [2021-10-07 15:22:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:27,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:27,662 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] [2021-10-07 15:22:27,678 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 15:22:27,876 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 15:22:27,877 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -403468820, now seen corresponding path program 11 times [2021-10-07 15:22:27,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:27,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43478013] [2021-10-07 15:22:27,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:22:27,879 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:27,881 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 15:22:27,882 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 15:22:28,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:22:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:28,484 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 15:22:28,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:28,776 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 15:22:28,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:28,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43478013] [2021-10-07 15:22:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43478013] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:28,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190655514] [2021-10-07 15:22:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:28,779 INFO L87 Difference]: Start difference. First operand 2178 states and 10686 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:30,269 INFO L93 Difference]: Finished difference Result 2826 states and 13224 transitions. [2021-10-07 15:22:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:22:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:22:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:30,279 INFO L225 Difference]: With dead ends: 2826 [2021-10-07 15:22:30,279 INFO L226 Difference]: Without dead ends: 2826 [2021-10-07 15:22:30,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:22:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-10-07 15:22:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2258. [2021-10-07 15:22:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 4.908728400531679) internal successors, (11079), 2257 states have internal predecessors, (11079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 11079 transitions. [2021-10-07 15:22:30,363 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 11079 transitions. Word has length 24 [2021-10-07 15:22:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:30,363 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 11079 transitions. [2021-10-07 15:22:30,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 11079 transitions. [2021-10-07 15:22:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:30,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:30,372 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] [2021-10-07 15:22:30,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-07 15:22:30,573 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 15:22:30,573 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1029947842, now seen corresponding path program 8 times [2021-10-07 15:22:30,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:30,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327489981] [2021-10-07 15:22:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:30,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:30,576 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 15:22:30,577 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 15:22:31,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:31,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:31,224 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 15:22:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:31,371 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 15:22:31,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327489981] [2021-10-07 15:22:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327489981] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:31,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:31,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321608610] [2021-10-07 15:22:31,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:31,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:31,374 INFO L87 Difference]: Start difference. First operand 2258 states and 11079 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:36,012 INFO L93 Difference]: Finished difference Result 5770 states and 26918 transitions. [2021-10-07 15:22:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:22:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:22:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:36,033 INFO L225 Difference]: With dead ends: 5770 [2021-10-07 15:22:36,033 INFO L226 Difference]: Without dead ends: 5770 [2021-10-07 15:22:36,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-10-07 15:22:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 2596. [2021-10-07 15:22:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 5.141811175337187) internal successors, (13343), 2595 states have internal predecessors, (13343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 13343 transitions. [2021-10-07 15:22:36,269 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 13343 transitions. Word has length 24 [2021-10-07 15:22:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:36,270 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 13343 transitions. [2021-10-07 15:22:36,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 13343 transitions. [2021-10-07 15:22:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:36,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:36,358 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] [2021-10-07 15:22:36,374 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 15:22:36,565 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 15:22:36,565 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1708072895, now seen corresponding path program 9 times [2021-10-07 15:22:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:36,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797045339] [2021-10-07 15:22:36,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:22:36,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:36,569 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 15:22:36,570 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 15:22:37,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:22:37,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:37,245 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 15:22:37,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:37,393 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 15:22:37,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:37,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797045339] [2021-10-07 15:22:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797045339] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:37,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:37,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:37,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117779927] [2021-10-07 15:22:37,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:37,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:37,396 INFO L87 Difference]: Start difference. First operand 2596 states and 13343 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:38,196 INFO L93 Difference]: Finished difference Result 4898 states and 22366 transitions. [2021-10-07 15:22:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:22:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:22:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:38,219 INFO L225 Difference]: With dead ends: 4898 [2021-10-07 15:22:38,219 INFO L226 Difference]: Without dead ends: 4840 [2021-10-07 15:22:38,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:22:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4840 states. [2021-10-07 15:22:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4840 to 2722. [2021-10-07 15:22:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 5.100698272693863) internal successors, (13879), 2721 states have internal predecessors, (13879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 13879 transitions. [2021-10-07 15:22:38,392 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 13879 transitions. Word has length 24 [2021-10-07 15:22:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:38,392 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 13879 transitions. [2021-10-07 15:22:38,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 13879 transitions. [2021-10-07 15:22:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:38,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:38,403 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] [2021-10-07 15:22:38,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-07 15:22:38,617 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 15:22:38,618 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1961269217, now seen corresponding path program 10 times [2021-10-07 15:22:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:38,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427493148] [2021-10-07 15:22:38,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:22:38,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:38,622 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 15:22:38,624 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 15:22:39,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:22:39,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:39,236 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 15:22:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:39,394 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 15:22:39,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:39,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427493148] [2021-10-07 15:22:39,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427493148] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:39,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:39,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162235390] [2021-10-07 15:22:39,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:39,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:39,397 INFO L87 Difference]: Start difference. First operand 2722 states and 13879 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:40,605 INFO L93 Difference]: Finished difference Result 5182 states and 24018 transitions. [2021-10-07 15:22:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:22:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:22:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:40,635 INFO L225 Difference]: With dead ends: 5182 [2021-10-07 15:22:40,635 INFO L226 Difference]: Without dead ends: 5182 [2021-10-07 15:22:40,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:22:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2021-10-07 15:22:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 2684. [2021-10-07 15:22:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 4.995900111815132) internal successors, (13404), 2683 states have internal predecessors, (13404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 13404 transitions. [2021-10-07 15:22:40,821 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 13404 transitions. Word has length 24 [2021-10-07 15:22:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:40,821 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 13404 transitions. [2021-10-07 15:22:40,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 13404 transitions. [2021-10-07 15:22:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:22:40,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:40,841 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] [2021-10-07 15:22:40,862 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 15:22:41,055 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 15:22:41,056 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1503467771, now seen corresponding path program 11 times [2021-10-07 15:22:41,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:41,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410915827] [2021-10-07 15:22:41,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:22:41,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:41,059 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 15:22:41,060 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 15:22:41,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:22:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:22:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:41,668 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 15:22:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:41,847 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 15:22:41,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:41,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410915827] [2021-10-07 15:22:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410915827] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:41,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:41,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:22:41,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263860839] [2021-10-07 15:22:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:22:41,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:22:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:22:41,849 INFO L87 Difference]: Start difference. First operand 2684 states and 13404 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:44,977 INFO L93 Difference]: Finished difference Result 4254 states and 20174 transitions. [2021-10-07 15:22:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:22:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 24 [2021-10-07 15:22:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:44,990 INFO L225 Difference]: With dead ends: 4254 [2021-10-07 15:22:44,991 INFO L226 Difference]: Without dead ends: 4254 [2021-10-07 15:22:44,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:22:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-10-07 15:22:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 2902. [2021-10-07 15:22:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 5.0027576697690455) internal successors, (14513), 2901 states have internal predecessors, (14513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 14513 transitions. [2021-10-07 15:22:45,148 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 14513 transitions. Word has length 24 [2021-10-07 15:22:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 14513 transitions. [2021-10-07 15:22:45,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 15:22:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 14513 transitions. [2021-10-07 15:22:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:22:45,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:45,175 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:22:45,193 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 15:22:45,388 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 15:22:45,389 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 20530467, now seen corresponding path program 12 times [2021-10-07 15:22:45,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:45,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933345050] [2021-10-07 15:22:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:22:45,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:45,392 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 15:22:45,394 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 15:22:45,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:22:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:22:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:22:46,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:46,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933345050] [2021-10-07 15:22:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933345050] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:46,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:46,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:22:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563035682] [2021-10-07 15:22:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:46,947 INFO L87 Difference]: Start difference. First operand 2902 states and 14513 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:49,434 INFO L93 Difference]: Finished difference Result 3458 states and 16472 transitions. [2021-10-07 15:22:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:22:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:22:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:49,448 INFO L225 Difference]: With dead ends: 3458 [2021-10-07 15:22:49,448 INFO L226 Difference]: Without dead ends: 3408 [2021-10-07 15:22:49,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-10-07 15:22:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2986. [2021-10-07 15:22:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.9798994974874375) internal successors, (14865), 2985 states have internal predecessors, (14865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 14865 transitions. [2021-10-07 15:22:49,531 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 14865 transitions. Word has length 25 [2021-10-07 15:22:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:49,531 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 14865 transitions. [2021-10-07 15:22:49,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 14865 transitions. [2021-10-07 15:22:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:22:49,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:49,539 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] [2021-10-07 15:22:49,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-07 15:22:49,740 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 15:22:49,741 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1499108146, now seen corresponding path program 1 times [2021-10-07 15:22:49,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:49,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706350658] [2021-10-07 15:22:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:22:49,743 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:49,745 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 15:22:49,747 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 15:22:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:22:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:22:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:50,891 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 15:22:50,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:51,308 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 15:22:51,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:51,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706350658] [2021-10-07 15:22:51,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706350658] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:51,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:51,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:22:51,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241721484] [2021-10-07 15:22:51,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:51,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:51,311 INFO L87 Difference]: Start difference. First operand 2986 states and 14865 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:51,989 INFO L93 Difference]: Finished difference Result 4108 states and 19507 transitions. [2021-10-07 15:22:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:22:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:22:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:52,003 INFO L225 Difference]: With dead ends: 4108 [2021-10-07 15:22:52,003 INFO L226 Difference]: Without dead ends: 3988 [2021-10-07 15:22:52,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2021-10-07 15:22:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3316. [2021-10-07 15:22:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 5.0711915535444945) internal successors, (16811), 3315 states have internal predecessors, (16811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 16811 transitions. [2021-10-07 15:22:52,139 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 16811 transitions. Word has length 25 [2021-10-07 15:22:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:52,140 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 16811 transitions. [2021-10-07 15:22:52,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 16811 transitions. [2021-10-07 15:22:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:22:52,151 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:52,151 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] [2021-10-07 15:22:52,162 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 15:22:52,352 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 15:22:52,352 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2078761486, now seen corresponding path program 2 times [2021-10-07 15:22:52,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:52,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479305121] [2021-10-07 15:22:52,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:22:52,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:52,356 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 15:22:52,357 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 15:22:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:22:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:22:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:53,542 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 15:22:53,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:53,949 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 15:22:53,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:53,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479305121] [2021-10-07 15:22:53,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479305121] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:53,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:53,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:22:53,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102826036] [2021-10-07 15:22:53,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:53,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:53,951 INFO L87 Difference]: Start difference. First operand 3316 states and 16811 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:54,659 INFO L93 Difference]: Finished difference Result 4366 states and 21219 transitions. [2021-10-07 15:22:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:22:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:22:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:54,681 INFO L225 Difference]: With dead ends: 4366 [2021-10-07 15:22:54,682 INFO L226 Difference]: Without dead ends: 4264 [2021-10-07 15:22:54,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-10-07 15:22:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3520. [2021-10-07 15:22:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 5.185848252344416) internal successors, (18249), 3519 states have internal predecessors, (18249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 18249 transitions. [2021-10-07 15:22:54,874 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 18249 transitions. Word has length 25 [2021-10-07 15:22:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 18249 transitions. [2021-10-07 15:22:54,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 18249 transitions. [2021-10-07 15:22:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:22:54,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:54,890 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] [2021-10-07 15:22:54,908 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 15:22:55,104 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 15:22:55,105 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1426692510, now seen corresponding path program 3 times [2021-10-07 15:22:55,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:55,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697664181] [2021-10-07 15:22:55,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:22:55,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:55,109 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 15:22:55,110 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 15:22:55,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:22:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:22:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:56,372 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 15:22:56,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:56,814 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 15:22:56,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697664181] [2021-10-07 15:22:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697664181] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:56,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:22:56,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538581724] [2021-10-07 15:22:56,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:56,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:56,816 INFO L87 Difference]: Start difference. First operand 3520 states and 18249 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:22:57,565 INFO L93 Difference]: Finished difference Result 4976 states and 24373 transitions. [2021-10-07 15:22:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:22:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:22:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:22:57,582 INFO L225 Difference]: With dead ends: 4976 [2021-10-07 15:22:57,582 INFO L226 Difference]: Without dead ends: 4854 [2021-10-07 15:22:57,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-10-07 15:22:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 3744. [2021-10-07 15:22:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 5.2631578947368425) internal successors, (19700), 3743 states have internal predecessors, (19700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 19700 transitions. [2021-10-07 15:22:57,747 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 19700 transitions. Word has length 25 [2021-10-07 15:22:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:22:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 19700 transitions. [2021-10-07 15:22:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:22:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 19700 transitions. [2021-10-07 15:22:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:22:57,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:22:57,764 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] [2021-10-07 15:22:57,778 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 15:22:57,975 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 15:22:57,976 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:22:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:22:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1191048782, now seen corresponding path program 4 times [2021-10-07 15:22:57,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:22:57,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298171764] [2021-10-07 15:22:57,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:22:57,979 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:22:57,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:22:57,980 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 15:22:57,981 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 15:22:58,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:22:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:22:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:22:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:22:59,183 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 15:22:59,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:22:59,641 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 15:22:59,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:22:59,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298171764] [2021-10-07 15:22:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298171764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:22:59,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:22:59,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:22:59,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581675989] [2021-10-07 15:22:59,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:22:59,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:22:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:22:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:22:59,643 INFO L87 Difference]: Start difference. First operand 3744 states and 19700 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:00,092 INFO L93 Difference]: Finished difference Result 4548 states and 22982 transitions. [2021-10-07 15:23:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:23:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:00,108 INFO L225 Difference]: With dead ends: 4548 [2021-10-07 15:23:00,108 INFO L226 Difference]: Without dead ends: 4446 [2021-10-07 15:23:00,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-10-07 15:23:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 4024. [2021-10-07 15:23:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 5.276659209545116) internal successors, (21228), 4023 states have internal predecessors, (21228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 21228 transitions. [2021-10-07 15:23:00,265 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 21228 transitions. Word has length 25 [2021-10-07 15:23:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:00,265 INFO L470 AbstractCegarLoop]: Abstraction has 4024 states and 21228 transitions. [2021-10-07 15:23:00,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 21228 transitions. [2021-10-07 15:23:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:00,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:00,278 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] [2021-10-07 15:23:00,289 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 15:23:00,479 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 15:23:00,479 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1024836366, now seen corresponding path program 5 times [2021-10-07 15:23:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:00,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323674916] [2021-10-07 15:23:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:23:00,481 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:00,483 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 15:23:00,484 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 15:23:01,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:23:01,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:01,660 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 15:23:01,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:02,155 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 15:23:02,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:02,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323674916] [2021-10-07 15:23:02,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323674916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:02,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:02,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:02,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903541122] [2021-10-07 15:23:02,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:02,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:02,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:02,158 INFO L87 Difference]: Start difference. First operand 4024 states and 21228 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:02,812 INFO L93 Difference]: Finished difference Result 5520 states and 27712 transitions. [2021-10-07 15:23:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:23:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:02,831 INFO L225 Difference]: With dead ends: 5520 [2021-10-07 15:23:02,831 INFO L226 Difference]: Without dead ends: 5414 [2021-10-07 15:23:02,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-10-07 15:23:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 4272. [2021-10-07 15:23:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4271 states have (on average 5.355654413486303) internal successors, (22874), 4271 states have internal predecessors, (22874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 22874 transitions. [2021-10-07 15:23:03,033 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 22874 transitions. Word has length 25 [2021-10-07 15:23:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:03,033 INFO L470 AbstractCegarLoop]: Abstraction has 4272 states and 22874 transitions. [2021-10-07 15:23:03,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 22874 transitions. [2021-10-07 15:23:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:03,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:03,048 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] [2021-10-07 15:23:03,059 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 15:23:03,255 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 15:23:03,256 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1880215582, now seen corresponding path program 6 times [2021-10-07 15:23:03,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:03,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145955936] [2021-10-07 15:23:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:23:03,258 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:03,260 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 15:23:03,261 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 15:23:03,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:23:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:04,567 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 15:23:04,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:04,930 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 15:23:04,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:04,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145955936] [2021-10-07 15:23:04,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145955936] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:04,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:04,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:04,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165219969] [2021-10-07 15:23:04,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:04,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:04,932 INFO L87 Difference]: Start difference. First operand 4272 states and 22874 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:05,500 INFO L93 Difference]: Finished difference Result 5074 states and 26225 transitions. [2021-10-07 15:23:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:23:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:05,517 INFO L225 Difference]: With dead ends: 5074 [2021-10-07 15:23:05,517 INFO L226 Difference]: Without dead ends: 4980 [2021-10-07 15:23:05,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2021-10-07 15:23:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 4478. [2021-10-07 15:23:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 5.380165289256198) internal successors, (24087), 4477 states have internal predecessors, (24087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 24087 transitions. [2021-10-07 15:23:05,641 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 24087 transitions. Word has length 25 [2021-10-07 15:23:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:05,642 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 24087 transitions. [2021-10-07 15:23:05,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 24087 transitions. [2021-10-07 15:23:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:05,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:05,655 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:05,668 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 15:23:05,855 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 15:23:05,856 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2022040157, now seen corresponding path program 13 times [2021-10-07 15:23:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:05,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672661978] [2021-10-07 15:23:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:23:05,858 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:05,859 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 15:23:05,861 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 15:23:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:09,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:09,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:09,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672661978] [2021-10-07 15:23:09,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672661978] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:09,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:09,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:09,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769105789] [2021-10-07 15:23:09,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:09,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-07 15:23:09,437 INFO L87 Difference]: Start difference. First operand 4478 states and 24087 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:14,177 INFO L93 Difference]: Finished difference Result 5260 states and 26772 transitions. [2021-10-07 15:23:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:14,196 INFO L225 Difference]: With dead ends: 5260 [2021-10-07 15:23:14,196 INFO L226 Difference]: Without dead ends: 5210 [2021-10-07 15:23:14,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6297.9ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-07 15:23:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-10-07 15:23:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4544. [2021-10-07 15:23:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 5.37838432753687) internal successors, (24434), 4543 states have internal predecessors, (24434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 24434 transitions. [2021-10-07 15:23:14,443 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 24434 transitions. Word has length 25 [2021-10-07 15:23:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:14,444 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 24434 transitions. [2021-10-07 15:23:14,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 24434 transitions. [2021-10-07 15:23:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:14,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:14,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:14,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-07 15:23:14,656 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 15:23:14,657 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash -466996205, now seen corresponding path program 12 times [2021-10-07 15:23:14,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:14,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263761573] [2021-10-07 15:23:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:23:14,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:14,660 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 15:23:14,661 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 15:23:15,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:23:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:15,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:16,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:16,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263761573] [2021-10-07 15:23:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263761573] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:16,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:16,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563019761] [2021-10-07 15:23:16,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:16,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:16,236 INFO L87 Difference]: Start difference. First operand 4544 states and 24434 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:18,609 INFO L93 Difference]: Finished difference Result 5196 states and 26736 transitions. [2021-10-07 15:23:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:18,629 INFO L225 Difference]: With dead ends: 5196 [2021-10-07 15:23:18,630 INFO L226 Difference]: Without dead ends: 5166 [2021-10-07 15:23:18,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:23:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-10-07 15:23:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4838. [2021-10-07 15:23:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 5.301013024602026) internal successors, (25641), 4837 states have internal predecessors, (25641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 25641 transitions. [2021-10-07 15:23:18,791 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 25641 transitions. Word has length 25 [2021-10-07 15:23:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:18,791 INFO L470 AbstractCegarLoop]: Abstraction has 4838 states and 25641 transitions. [2021-10-07 15:23:18,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 25641 transitions. [2021-10-07 15:23:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:18,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:18,806 INFO L512 BasicCegarLoop]: trace histogram [3, 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 15:23:18,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-10-07 15:23:19,007 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 15:23:19,007 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash -589094059, now seen corresponding path program 13 times [2021-10-07 15:23:19,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:19,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373766687] [2021-10-07 15:23:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:23:19,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:19,011 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 15:23:19,013 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 15:23:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:23:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:21,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:21,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373766687] [2021-10-07 15:23:21,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373766687] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:21,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:21,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:23:21,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319652330] [2021-10-07 15:23:21,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:23:21,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:23:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:23:21,099 INFO L87 Difference]: Start difference. First operand 4838 states and 25641 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:23,997 INFO L93 Difference]: Finished difference Result 9872 states and 47313 transitions. [2021-10-07 15:23:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:23:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-07 15:23:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:24,036 INFO L225 Difference]: With dead ends: 9872 [2021-10-07 15:23:24,036 INFO L226 Difference]: Without dead ends: 9872 [2021-10-07 15:23:24,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1866.9ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:23:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2021-10-07 15:23:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 5428. [2021-10-07 15:23:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 5.358577482955592) internal successors, (29081), 5427 states have internal predecessors, (29081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 29081 transitions. [2021-10-07 15:23:24,366 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 29081 transitions. Word has length 25 [2021-10-07 15:23:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:24,367 INFO L470 AbstractCegarLoop]: Abstraction has 5428 states and 29081 transitions. [2021-10-07 15:23:24,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 29081 transitions. [2021-10-07 15:23:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:24,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:24,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:24,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-10-07 15:23:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:24,581 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 585027665, now seen corresponding path program 14 times [2021-10-07 15:23:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:24,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448376756] [2021-10-07 15:23:24,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:23:24,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:24,585 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:24,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-07 15:23:25,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:23:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:27,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:28,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:28,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448376756] [2021-10-07 15:23:28,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448376756] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:28,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:28,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:28,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045876104] [2021-10-07 15:23:28,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:28,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-07 15:23:28,170 INFO L87 Difference]: Start difference. First operand 5428 states and 29081 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:33,083 INFO L93 Difference]: Finished difference Result 6178 states and 31908 transitions. [2021-10-07 15:23:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:33,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:33,107 INFO L225 Difference]: With dead ends: 6178 [2021-10-07 15:23:33,107 INFO L226 Difference]: Without dead ends: 6148 [2021-10-07 15:23:33,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6294.1ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-07 15:23:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-10-07 15:23:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 5630. [2021-10-07 15:23:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 5629 states have (on average 5.343933203055605) internal successors, (30081), 5629 states have internal predecessors, (30081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 30081 transitions. [2021-10-07 15:23:33,318 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 30081 transitions. Word has length 25 [2021-10-07 15:23:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:33,318 INFO L470 AbstractCegarLoop]: Abstraction has 5630 states and 30081 transitions. [2021-10-07 15:23:33,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 30081 transitions. [2021-10-07 15:23:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:33,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:33,334 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:33,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-10-07 15:23:33,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:33,548 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 218536845, now seen corresponding path program 15 times [2021-10-07 15:23:33,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:33,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141421471] [2021-10-07 15:23:33,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:23:33,551 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:33,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:33,552 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:33,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-07 15:23:34,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:23:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:36,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:37,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:37,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141421471] [2021-10-07 15:23:37,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141421471] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:37,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:37,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:37,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681491329] [2021-10-07 15:23:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:37,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-07 15:23:37,300 INFO L87 Difference]: Start difference. First operand 5630 states and 30081 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:42,119 INFO L93 Difference]: Finished difference Result 6040 states and 31335 transitions. [2021-10-07 15:23:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:42,143 INFO L225 Difference]: With dead ends: 6040 [2021-10-07 15:23:42,143 INFO L226 Difference]: Without dead ends: 6010 [2021-10-07 15:23:42,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6327.0ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-07 15:23:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2021-10-07 15:23:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 5616. [2021-10-07 15:23:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5616 states, 5615 states have (on average 5.343009795191452) internal successors, (30001), 5615 states have internal predecessors, (30001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5616 states to 5616 states and 30001 transitions. [2021-10-07 15:23:42,332 INFO L78 Accepts]: Start accepts. Automaton has 5616 states and 30001 transitions. Word has length 25 [2021-10-07 15:23:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:42,332 INFO L470 AbstractCegarLoop]: Abstraction has 5616 states and 30001 transitions. [2021-10-07 15:23:42,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5616 states and 30001 transitions. [2021-10-07 15:23:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:42,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:42,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:42,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:42,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:42,555 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1422328995, now seen corresponding path program 16 times [2021-10-07 15:23:42,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:42,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826780292] [2021-10-07 15:23:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:23:42,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:42,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:42,558 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:42,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-07 15:23:43,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:23:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:43,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:44,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:44,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826780292] [2021-10-07 15:23:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826780292] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:44,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:44,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290066061] [2021-10-07 15:23:44,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:44,114 INFO L87 Difference]: Start difference. First operand 5616 states and 30001 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:46,780 INFO L93 Difference]: Finished difference Result 6150 states and 31911 transitions. [2021-10-07 15:23:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:46,805 INFO L225 Difference]: With dead ends: 6150 [2021-10-07 15:23:46,805 INFO L226 Difference]: Without dead ends: 6120 [2021-10-07 15:23:46,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:23:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2021-10-07 15:23:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 5766. [2021-10-07 15:23:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5766 states, 5765 states have (on average 5.324024284475282) internal successors, (30693), 5765 states have internal predecessors, (30693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5766 states to 5766 states and 30693 transitions. [2021-10-07 15:23:47,009 INFO L78 Accepts]: Start accepts. Automaton has 5766 states and 30693 transitions. Word has length 25 [2021-10-07 15:23:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:47,009 INFO L470 AbstractCegarLoop]: Abstraction has 5766 states and 30693 transitions. [2021-10-07 15:23:47,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5766 states and 30693 transitions. [2021-10-07 15:23:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:47,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:47,025 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:23:47,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-10-07 15:23:47,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:47,226 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash -366119867, now seen corresponding path program 14 times [2021-10-07 15:23:47,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:47,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830944942] [2021-10-07 15:23:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:23:47,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:47,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:47,229 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:47,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-07 15:23:48,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:23:48,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:23:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:50,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:50,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830944942] [2021-10-07 15:23:50,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830944942] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:50,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:50,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:50,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214767907] [2021-10-07 15:23:50,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:50,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2021-10-07 15:23:50,985 INFO L87 Difference]: Start difference. First operand 5766 states and 30693 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:23:57,200 INFO L93 Difference]: Finished difference Result 6286 states and 32313 transitions. [2021-10-07 15:23:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:23:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:23:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:23:57,223 INFO L225 Difference]: With dead ends: 6286 [2021-10-07 15:23:57,223 INFO L226 Difference]: Without dead ends: 6236 [2021-10-07 15:23:57,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6313.9ms TimeCoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-10-07 15:23:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-10-07 15:23:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5752. [2021-10-07 15:23:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5752 states, 5751 states have (on average 5.3227264823508955) internal successors, (30611), 5751 states have internal predecessors, (30611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5752 states to 5752 states and 30611 transitions. [2021-10-07 15:23:57,450 INFO L78 Accepts]: Start accepts. Automaton has 5752 states and 30611 transitions. Word has length 25 [2021-10-07 15:23:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:23:57,450 INFO L470 AbstractCegarLoop]: Abstraction has 5752 states and 30611 transitions. [2021-10-07 15:23:57,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:23:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5752 states and 30611 transitions. [2021-10-07 15:23:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:23:57,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:23:57,466 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] [2021-10-07 15:23:57,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-07 15:23:57,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:23:57,680 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:23:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:23:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1852887698, now seen corresponding path program 7 times [2021-10-07 15:23:57,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:23:57,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159572727] [2021-10-07 15:23:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:23:57,682 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:23:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:23:57,683 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:23:57,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-07 15:23:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:23:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:23:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:23:59,081 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 15:23:59,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:23:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:23:59,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:23:59,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159572727] [2021-10-07 15:23:59,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159572727] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:23:59,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:23:59,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:23:59,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655251013] [2021-10-07 15:23:59,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:23:59,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:23:59,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:23:59,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:23:59,465 INFO L87 Difference]: Start difference. First operand 5752 states and 30611 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:00,191 INFO L93 Difference]: Finished difference Result 6900 states and 35380 transitions. [2021-10-07 15:24:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:24:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:00,217 INFO L225 Difference]: With dead ends: 6900 [2021-10-07 15:24:00,217 INFO L226 Difference]: Without dead ends: 6780 [2021-10-07 15:24:00,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6780 states. [2021-10-07 15:24:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6780 to 5946. [2021-10-07 15:24:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5946 states, 5945 states have (on average 5.35878889823381) internal successors, (31858), 5945 states have internal predecessors, (31858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5946 states to 5946 states and 31858 transitions. [2021-10-07 15:24:00,471 INFO L78 Accepts]: Start accepts. Automaton has 5946 states and 31858 transitions. Word has length 25 [2021-10-07 15:24:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:00,472 INFO L470 AbstractCegarLoop]: Abstraction has 5946 states and 31858 transitions. [2021-10-07 15:24:00,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5946 states and 31858 transitions. [2021-10-07 15:24:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:00,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:00,487 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] [2021-10-07 15:24:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:00,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:00,688 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1135790034, now seen corresponding path program 8 times [2021-10-07 15:24:00,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:00,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678779937] [2021-10-07 15:24:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:24:00,690 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:00,691 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:00,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-07 15:24:01,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:24:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:02,262 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 15:24:02,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:02,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:02,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678779937] [2021-10-07 15:24:02,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678779937] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:02,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:02,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:02,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602141800] [2021-10-07 15:24:02,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:02,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:02,653 INFO L87 Difference]: Start difference. First operand 5946 states and 31858 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:03,214 INFO L93 Difference]: Finished difference Result 7044 states and 36448 transitions. [2021-10-07 15:24:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:24:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:03,246 INFO L225 Difference]: With dead ends: 7044 [2021-10-07 15:24:03,246 INFO L226 Difference]: Without dead ends: 6942 [2021-10-07 15:24:03,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-10-07 15:24:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6034. [2021-10-07 15:24:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 5.411735454997514) internal successors, (32649), 6033 states have internal predecessors, (32649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 32649 transitions. [2021-10-07 15:24:03,479 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 32649 transitions. Word has length 25 [2021-10-07 15:24:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:03,479 INFO L470 AbstractCegarLoop]: Abstraction has 6034 states and 32649 transitions. [2021-10-07 15:24:03,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 32649 transitions. [2021-10-07 15:24:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:03,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:03,500 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] [2021-10-07 15:24:03,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:03,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:03,714 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 407162894, now seen corresponding path program 9 times [2021-10-07 15:24:03,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:03,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993331770] [2021-10-07 15:24:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:24:03,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:03,718 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-07 15:24:04,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:24:04,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:05,247 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 15:24:05,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:05,612 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 15:24:05,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993331770] [2021-10-07 15:24:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993331770] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:05,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028595127] [2021-10-07 15:24:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:05,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:05,614 INFO L87 Difference]: Start difference. First operand 6034 states and 32649 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:06,415 INFO L93 Difference]: Finished difference Result 7558 states and 39059 transitions. [2021-10-07 15:24:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:06,440 INFO L225 Difference]: With dead ends: 7558 [2021-10-07 15:24:06,440 INFO L226 Difference]: Without dead ends: 7436 [2021-10-07 15:24:06,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7436 states. [2021-10-07 15:24:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7436 to 6268. [2021-10-07 15:24:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 6267 states have (on average 5.4538056486357105) internal successors, (34179), 6267 states have internal predecessors, (34179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 34179 transitions. [2021-10-07 15:24:06,603 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 34179 transitions. Word has length 25 [2021-10-07 15:24:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:06,603 INFO L470 AbstractCegarLoop]: Abstraction has 6268 states and 34179 transitions. [2021-10-07 15:24:06,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 34179 transitions. [2021-10-07 15:24:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:06,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:06,620 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] [2021-10-07 15:24:06,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-10-07 15:24:06,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:06,828 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash -816743854, now seen corresponding path program 10 times [2021-10-07 15:24:06,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:06,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664196282] [2021-10-07 15:24:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:24:06,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:06,831 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:06,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-07 15:24:07,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:24:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:07,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:08,255 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 15:24:08,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:08,626 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 15:24:08,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:08,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664196282] [2021-10-07 15:24:08,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664196282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:08,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:08,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:08,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471911468] [2021-10-07 15:24:08,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:08,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:08,628 INFO L87 Difference]: Start difference. First operand 6268 states and 34179 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:09,200 INFO L93 Difference]: Finished difference Result 7150 states and 37772 transitions. [2021-10-07 15:24:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:24:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:09,235 INFO L225 Difference]: With dead ends: 7150 [2021-10-07 15:24:09,235 INFO L226 Difference]: Without dead ends: 7034 [2021-10-07 15:24:09,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-10-07 15:24:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6544. [2021-10-07 15:24:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 5.456518416628458) internal successors, (35702), 6543 states have internal predecessors, (35702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 35702 transitions. [2021-10-07 15:24:09,412 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 35702 transitions. Word has length 25 [2021-10-07 15:24:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:09,412 INFO L470 AbstractCegarLoop]: Abstraction has 6544 states and 35702 transitions. [2021-10-07 15:24:09,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 35702 transitions. [2021-10-07 15:24:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:09,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:09,429 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] [2021-10-07 15:24:09,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:09,630 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1649166546, now seen corresponding path program 11 times [2021-10-07 15:24:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:09,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248386936] [2021-10-07 15:24:09,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:24:09,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:09,633 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-07 15:24:10,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:24:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:11,107 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 15:24:11,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:11,482 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 15:24:11,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:11,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248386936] [2021-10-07 15:24:11,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248386936] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:11,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942435677] [2021-10-07 15:24:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:11,484 INFO L87 Difference]: Start difference. First operand 6544 states and 35702 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:12,215 INFO L93 Difference]: Finished difference Result 8134 states and 42596 transitions. [2021-10-07 15:24:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:12,247 INFO L225 Difference]: With dead ends: 8134 [2021-10-07 15:24:12,247 INFO L226 Difference]: Without dead ends: 8028 [2021-10-07 15:24:12,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2021-10-07 15:24:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 6834. [2021-10-07 15:24:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6834 states, 6833 states have (on average 5.4999268256988145) internal successors, (37581), 6833 states have internal predecessors, (37581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 37581 transitions. [2021-10-07 15:24:12,460 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 37581 transitions. Word has length 25 [2021-10-07 15:24:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:12,461 INFO L470 AbstractCegarLoop]: Abstraction has 6834 states and 37581 transitions. [2021-10-07 15:24:12,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 37581 transitions. [2021-10-07 15:24:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:12,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:12,479 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] [2021-10-07 15:24:12,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:12,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:12,692 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash -285583026, now seen corresponding path program 12 times [2021-10-07 15:24:12,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:12,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050231812] [2021-10-07 15:24:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:24:12,693 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:12,695 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:12,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-07 15:24:13,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:24:13,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:14,296 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 15:24:14,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:14,746 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 15:24:14,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:14,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050231812] [2021-10-07 15:24:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050231812] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:14,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:14,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388736381] [2021-10-07 15:24:14,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:14,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:14,751 INFO L87 Difference]: Start difference. First operand 6834 states and 37581 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:15,270 INFO L93 Difference]: Finished difference Result 7722 states and 41282 transitions. [2021-10-07 15:24:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:24:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:15,303 INFO L225 Difference]: With dead ends: 7722 [2021-10-07 15:24:15,303 INFO L226 Difference]: Without dead ends: 7616 [2021-10-07 15:24:15,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2021-10-07 15:24:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7040. [2021-10-07 15:24:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7040 states, 7039 states have (on average 5.513425202443529) internal successors, (38809), 7039 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7040 states to 7040 states and 38809 transitions. [2021-10-07 15:24:15,502 INFO L78 Accepts]: Start accepts. Automaton has 7040 states and 38809 transitions. Word has length 25 [2021-10-07 15:24:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:15,502 INFO L470 AbstractCegarLoop]: Abstraction has 7040 states and 38809 transitions. [2021-10-07 15:24:15,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7040 states and 38809 transitions. [2021-10-07 15:24:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:15,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:15,524 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:15,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-10-07 15:24:15,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:15,725 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1145428195, now seen corresponding path program 15 times [2021-10-07 15:24:15,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:15,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952255527] [2021-10-07 15:24:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:24:15,727 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:15,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:15,729 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:15,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-07 15:24:16,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:24:16,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:17,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:17,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:17,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952255527] [2021-10-07 15:24:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952255527] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:17,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:17,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:17,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786333252] [2021-10-07 15:24:17,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:17,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:17,716 INFO L87 Difference]: Start difference. First operand 7040 states and 38809 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:20,434 INFO L93 Difference]: Finished difference Result 7764 states and 41377 transitions. [2021-10-07 15:24:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:24:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:20,464 INFO L225 Difference]: With dead ends: 7764 [2021-10-07 15:24:20,464 INFO L226 Difference]: Without dead ends: 7714 [2021-10-07 15:24:20,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:24:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-10-07 15:24:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7218. [2021-10-07 15:24:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 5.488152972149092) internal successors, (39608), 7217 states have internal predecessors, (39608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 39608 transitions. [2021-10-07 15:24:20,669 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 39608 transitions. Word has length 25 [2021-10-07 15:24:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:20,669 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 39608 transitions. [2021-10-07 15:24:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 39608 transitions. [2021-10-07 15:24:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:20,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:20,689 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] [2021-10-07 15:24:20,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:20,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:20,890 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -49015474, now seen corresponding path program 13 times [2021-10-07 15:24:20,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:20,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124581103] [2021-10-07 15:24:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:24:20,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:20,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:20,893 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:20,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-07 15:24:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:24:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:22,513 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 15:24:22,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:22,876 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 15:24:22,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:22,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124581103] [2021-10-07 15:24:22,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124581103] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:22,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:22,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:22,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444681614] [2021-10-07 15:24:22,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:22,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:22,878 INFO L87 Difference]: Start difference. First operand 7218 states and 39608 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:23,511 INFO L93 Difference]: Finished difference Result 8958 states and 47159 transitions. [2021-10-07 15:24:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:23,546 INFO L225 Difference]: With dead ends: 8958 [2021-10-07 15:24:23,547 INFO L226 Difference]: Without dead ends: 8856 [2021-10-07 15:24:23,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-10-07 15:24:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 7396. [2021-10-07 15:24:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 5.515483434753212) internal successors, (40787), 7395 states have internal predecessors, (40787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 40787 transitions. [2021-10-07 15:24:23,776 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 40787 transitions. Word has length 25 [2021-10-07 15:24:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:23,776 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 40787 transitions. [2021-10-07 15:24:23,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 40787 transitions. [2021-10-07 15:24:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:23,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:23,855 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] [2021-10-07 15:24:23,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:24,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:24,056 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1456101346, now seen corresponding path program 14 times [2021-10-07 15:24:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:24,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175711351] [2021-10-07 15:24:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:24:24,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:24,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:24,061 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:24,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-07 15:24:25,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:24:25,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:25,720 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 15:24:25,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:26,096 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 15:24:26,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:26,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175711351] [2021-10-07 15:24:26,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175711351] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:26,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:26,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:26,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158045996] [2021-10-07 15:24:26,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:26,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:26,098 INFO L87 Difference]: Start difference. First operand 7396 states and 40787 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:26,858 INFO L93 Difference]: Finished difference Result 9206 states and 48617 transitions. [2021-10-07 15:24:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:26,894 INFO L225 Difference]: With dead ends: 9206 [2021-10-07 15:24:26,894 INFO L226 Difference]: Without dead ends: 9090 [2021-10-07 15:24:26,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-10-07 15:24:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 7558. [2021-10-07 15:24:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7557 states have (on average 5.5475717877464605) internal successors, (41923), 7557 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 41923 transitions. [2021-10-07 15:24:27,212 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 41923 transitions. Word has length 25 [2021-10-07 15:24:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:27,213 INFO L470 AbstractCegarLoop]: Abstraction has 7558 states and 41923 transitions. [2021-10-07 15:24:27,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 41923 transitions. [2021-10-07 15:24:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:27,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:27,234 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] [2021-10-07 15:24:27,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-10-07 15:24:27,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:27,435 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -440653278, now seen corresponding path program 15 times [2021-10-07 15:24:27,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:27,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277665756] [2021-10-07 15:24:27,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:24:27,437 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:27,438 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:27,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-07 15:24:28,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:24:28,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:28,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:29,202 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 15:24:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:29,581 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 15:24:29,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277665756] [2021-10-07 15:24:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277665756] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:29,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233203202] [2021-10-07 15:24:29,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:29,583 INFO L87 Difference]: Start difference. First operand 7558 states and 41923 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:30,312 INFO L93 Difference]: Finished difference Result 9396 states and 50193 transitions. [2021-10-07 15:24:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:30,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:30,455 INFO L225 Difference]: With dead ends: 9396 [2021-10-07 15:24:30,455 INFO L226 Difference]: Without dead ends: 9298 [2021-10-07 15:24:30,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2021-10-07 15:24:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 7800. [2021-10-07 15:24:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 7799 states have (on average 5.5802025900756504) internal successors, (43520), 7799 states have internal predecessors, (43520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 43520 transitions. [2021-10-07 15:24:30,696 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 43520 transitions. Word has length 25 [2021-10-07 15:24:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:30,696 INFO L470 AbstractCegarLoop]: Abstraction has 7800 states and 43520 transitions. [2021-10-07 15:24:30,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 43520 transitions. [2021-10-07 15:24:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:24:30,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:30,718 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] [2021-10-07 15:24:30,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:30,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:30,919 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1421711502, now seen corresponding path program 16 times [2021-10-07 15:24:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273993938] [2021-10-07 15:24:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:24:30,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:30,923 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:30,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-07 15:24:31,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:24:31,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:24:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:32,626 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 15:24:32,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:33,017 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 15:24:33,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:33,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273993938] [2021-10-07 15:24:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273993938] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:33,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:24:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227668361] [2021-10-07 15:24:33,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:24:33,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:24:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:33,019 INFO L87 Difference]: Start difference. First operand 7800 states and 43520 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:34,206 INFO L93 Difference]: Finished difference Result 9728 states and 52163 transitions. [2021-10-07 15:24:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:24:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 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 25 [2021-10-07 15:24:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:34,254 INFO L225 Difference]: With dead ends: 9728 [2021-10-07 15:24:34,254 INFO L226 Difference]: Without dead ends: 9614 [2021-10-07 15:24:34,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:24:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9614 states. [2021-10-07 15:24:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9614 to 8028. [2021-10-07 15:24:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8028 states, 8027 states have (on average 5.618412856608945) internal successors, (45099), 8027 states have internal predecessors, (45099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8028 states to 8028 states and 45099 transitions. [2021-10-07 15:24:34,597 INFO L78 Accepts]: Start accepts. Automaton has 8028 states and 45099 transitions. Word has length 25 [2021-10-07 15:24:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:34,597 INFO L470 AbstractCegarLoop]: Abstraction has 8028 states and 45099 transitions. [2021-10-07 15:24:34,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8028 states and 45099 transitions. [2021-10-07 15:24:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:24:34,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:34,616 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:34,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-10-07 15:24:34,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:34,818 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1124655685, now seen corresponding path program 16 times [2021-10-07 15:24:34,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:34,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943882436] [2021-10-07 15:24:34,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:24:34,820 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:34,822 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:34,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-07 15:24:35,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:24:35,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:35,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:24:35,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:36,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:36,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:36,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943882436] [2021-10-07 15:24:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943882436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:36,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:36,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:24:36,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310863053] [2021-10-07 15:24:36,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:24:36,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:24:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:24:36,410 INFO L87 Difference]: Start difference. First operand 8028 states and 45099 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:42,707 INFO L93 Difference]: Finished difference Result 14062 states and 74071 transitions. [2021-10-07 15:24:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:24:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:24:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:42,795 INFO L225 Difference]: With dead ends: 14062 [2021-10-07 15:24:42,795 INFO L226 Difference]: Without dead ends: 14062 [2021-10-07 15:24:42,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 885.1ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:24:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14062 states. [2021-10-07 15:24:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14062 to 9532. [2021-10-07 15:24:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 5.616724373098311) internal successors, (53533), 9531 states have internal predecessors, (53533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 53533 transitions. [2021-10-07 15:24:43,182 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 53533 transitions. Word has length 26 [2021-10-07 15:24:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:43,183 INFO L470 AbstractCegarLoop]: Abstraction has 9532 states and 53533 transitions. [2021-10-07 15:24:43,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 53533 transitions. [2021-10-07 15:24:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:24:43,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:43,210 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:43,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-10-07 15:24:43,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:43,411 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1593287420, now seen corresponding path program 17 times [2021-10-07 15:24:43,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:43,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456131435] [2021-10-07 15:24:43,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:24:43,413 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:43,415 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:43,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-07 15:24:44,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:24:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:24:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:44,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:45,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:45,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456131435] [2021-10-07 15:24:45,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456131435] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:45,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:45,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:24:45,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212906537] [2021-10-07 15:24:45,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:24:45,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:24:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:24:45,399 INFO L87 Difference]: Start difference. First operand 9532 states and 53533 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:47,874 INFO L93 Difference]: Finished difference Result 14414 states and 73597 transitions. [2021-10-07 15:24:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:24:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:24:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:47,932 INFO L225 Difference]: With dead ends: 14414 [2021-10-07 15:24:47,933 INFO L226 Difference]: Without dead ends: 14066 [2021-10-07 15:24:47,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1472.7ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:24:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14066 states. [2021-10-07 15:24:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14066 to 10202. [2021-10-07 15:24:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 5.5932751691010685) internal successors, (57057), 10201 states have internal predecessors, (57057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 57057 transitions. [2021-10-07 15:24:48,343 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 57057 transitions. Word has length 26 [2021-10-07 15:24:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:48,344 INFO L470 AbstractCegarLoop]: Abstraction has 10202 states and 57057 transitions. [2021-10-07 15:24:48,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 57057 transitions. [2021-10-07 15:24:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:24:48,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:48,373 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:48,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:48,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:48,584 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1122520063, now seen corresponding path program 18 times [2021-10-07 15:24:48,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:48,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436616750] [2021-10-07 15:24:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:24:48,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:48,587 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-07 15:24:49,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:24:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:24:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:24:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:50,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:50,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:50,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436616750] [2021-10-07 15:24:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436616750] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:50,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:50,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:24:50,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616093445] [2021-10-07 15:24:50,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:24:50,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:24:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:24:50,611 INFO L87 Difference]: Start difference. First operand 10202 states and 57057 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:24:54,732 INFO L93 Difference]: Finished difference Result 20750 states and 107018 transitions. [2021-10-07 15:24:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:24:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:24:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:24:54,834 INFO L225 Difference]: With dead ends: 20750 [2021-10-07 15:24:54,834 INFO L226 Difference]: Without dead ends: 20734 [2021-10-07 15:24:54,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2124.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:24:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20734 states. [2021-10-07 15:24:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20734 to 11850. [2021-10-07 15:24:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 5.656933074521056) internal successors, (67029), 11849 states have internal predecessors, (67029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 67029 transitions. [2021-10-07 15:24:55,496 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 67029 transitions. Word has length 26 [2021-10-07 15:24:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:24:55,496 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 67029 transitions. [2021-10-07 15:24:55,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:24:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 67029 transitions. [2021-10-07 15:24:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:24:55,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:24:55,530 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:24:55,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-07 15:24:55,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:24:55,737 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:24:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:24:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash -101816990, now seen corresponding path program 19 times [2021-10-07 15:24:55,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:24:55,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383288418] [2021-10-07 15:24:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:24:55,739 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:24:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:24:55,740 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:24:55,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-07 15:24:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:24:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:24:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:24:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:59,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:24:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:24:59,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:24:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383288418] [2021-10-07 15:24:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383288418] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:24:59,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:24:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:24:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75285866] [2021-10-07 15:24:59,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:24:59,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:24:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:24:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2021-10-07 15:24:59,458 INFO L87 Difference]: Start difference. First operand 11850 states and 67029 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:13,353 INFO L93 Difference]: Finished difference Result 18598 states and 97230 transitions. [2021-10-07 15:25:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:25:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:25:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:13,436 INFO L225 Difference]: With dead ends: 18598 [2021-10-07 15:25:13,436 INFO L226 Difference]: Without dead ends: 18366 [2021-10-07 15:25:13,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4867.5ms TimeCoverageRelationStatistics Valid=104, Invalid=544, Unknown=2, NotChecked=0, Total=650 [2021-10-07 15:25:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18366 states. [2021-10-07 15:25:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18366 to 12778. [2021-10-07 15:25:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 5.7114346090631605) internal successors, (72975), 12777 states have internal predecessors, (72975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 72975 transitions. [2021-10-07 15:25:14,109 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 72975 transitions. Word has length 26 [2021-10-07 15:25:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:14,110 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 72975 transitions. [2021-10-07 15:25:14,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 72975 transitions. [2021-10-07 15:25:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:25:14,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:14,148 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:14,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:14,349 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:25:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:14,350 INFO L82 PathProgramCache]: Analyzing trace with hash -917914939, now seen corresponding path program 20 times [2021-10-07 15:25:14,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:14,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107382385] [2021-10-07 15:25:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:25:14,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:14,352 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:14,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-07 15:25:15,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:25:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:25:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:15,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:16,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:16,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107382385] [2021-10-07 15:25:16,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107382385] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:16,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:16,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:25:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383342010] [2021-10-07 15:25:16,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:25:16,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:25:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:25:16,086 INFO L87 Difference]: Start difference. First operand 12778 states and 72975 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:30,660 INFO L93 Difference]: Finished difference Result 27650 states and 141230 transitions. [2021-10-07 15:25:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 15:25:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:25:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:30,813 INFO L225 Difference]: With dead ends: 27650 [2021-10-07 15:25:30,813 INFO L226 Difference]: Without dead ends: 27650 [2021-10-07 15:25:30,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1644.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:25:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27650 states. [2021-10-07 15:25:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27650 to 14908. [2021-10-07 15:25:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14908 states, 14907 states have (on average 5.8145166700207955) internal successors, (86677), 14907 states have internal predecessors, (86677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14908 states to 14908 states and 86677 transitions. [2021-10-07 15:25:31,767 INFO L78 Accepts]: Start accepts. Automaton has 14908 states and 86677 transitions. Word has length 26 [2021-10-07 15:25:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:31,771 INFO L470 AbstractCegarLoop]: Abstraction has 14908 states and 86677 transitions. [2021-10-07 15:25:31,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14908 states and 86677 transitions. [2021-10-07 15:25:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:25:31,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:31,812 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:31,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:32,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:32,028 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:25:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash 639031620, now seen corresponding path program 21 times [2021-10-07 15:25:32,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:32,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287353616] [2021-10-07 15:25:32,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:25:32,031 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:32,032 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:32,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-07 15:25:33,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:25:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:25:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:33,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:34,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:34,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287353616] [2021-10-07 15:25:34,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287353616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:34,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:34,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-07 15:25:34,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428740331] [2021-10-07 15:25:34,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:25:34,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:25:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:25:34,045 INFO L87 Difference]: Start difference. First operand 14908 states and 86677 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:39,397 INFO L93 Difference]: Finished difference Result 28832 states and 149547 transitions. [2021-10-07 15:25:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-07 15:25:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:25:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:39,535 INFO L225 Difference]: With dead ends: 28832 [2021-10-07 15:25:39,535 INFO L226 Difference]: Without dead ends: 28772 [2021-10-07 15:25:39,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2824.7ms TimeCoverageRelationStatistics Valid=391, Invalid=2059, Unknown=0, NotChecked=0, Total=2450 [2021-10-07 15:25:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28772 states. [2021-10-07 15:25:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28772 to 16428. [2021-10-07 15:25:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16428 states, 16427 states have (on average 5.831009922688257) internal successors, (95786), 16427 states have internal predecessors, (95786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16428 states to 16428 states and 95786 transitions. [2021-10-07 15:25:40,491 INFO L78 Accepts]: Start accepts. Automaton has 16428 states and 95786 transitions. Word has length 26 [2021-10-07 15:25:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 16428 states and 95786 transitions. [2021-10-07 15:25:40,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 16428 states and 95786 transitions. [2021-10-07 15:25:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:25:40,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:40,548 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:40,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-10-07 15:25:40,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:40,749 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:25:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 385835298, now seen corresponding path program 22 times [2021-10-07 15:25:40,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:40,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43854353] [2021-10-07 15:25:40,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:25:40,752 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:40,752 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:40,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-07 15:25:42,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:25:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:25:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:42,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:42,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:43,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43854353] [2021-10-07 15:25:43,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43854353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:43,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:43,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:25:43,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352870367] [2021-10-07 15:25:43,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:25:43,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:25:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:25:43,001 INFO L87 Difference]: Start difference. First operand 16428 states and 95786 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:25:48,176 INFO L93 Difference]: Finished difference Result 27094 states and 144512 transitions. [2021-10-07 15:25:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:25:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:25:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:25:48,311 INFO L225 Difference]: With dead ends: 27094 [2021-10-07 15:25:48,311 INFO L226 Difference]: Without dead ends: 27094 [2021-10-07 15:25:48,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 905.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:25:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27094 states. [2021-10-07 15:25:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27094 to 17910. [2021-10-07 15:25:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17910 states, 17909 states have (on average 5.858339382433414) internal successors, (104917), 17909 states have internal predecessors, (104917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17910 states to 17910 states and 104917 transitions. [2021-10-07 15:25:49,477 INFO L78 Accepts]: Start accepts. Automaton has 17910 states and 104917 transitions. Word has length 26 [2021-10-07 15:25:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:25:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 17910 states and 104917 transitions. [2021-10-07 15:25:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:25:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 17910 states and 104917 transitions. [2021-10-07 15:25:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:25:49,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:25:49,532 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:25:49,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-07 15:25:49,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:25:49,733 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:25:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:25:49,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2046910233, now seen corresponding path program 23 times [2021-10-07 15:25:49,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:25:49,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146446222] [2021-10-07 15:25:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:25:49,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:25:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:25:49,886 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:25:49,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-07 15:25:51,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:25:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:25:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:25:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:25:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:53,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:25:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:25:53,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:25:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146446222] [2021-10-07 15:25:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146446222] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:25:53,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:25:53,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:25:53,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406808603] [2021-10-07 15:25:53,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:25:53,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:25:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:25:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2021-10-07 15:25:53,650 INFO L87 Difference]: Start difference. First operand 17910 states and 104917 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:10,183 INFO L93 Difference]: Finished difference Result 28024 states and 150029 transitions. [2021-10-07 15:26:10,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:26:10,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:26:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:10,452 INFO L225 Difference]: With dead ends: 28024 [2021-10-07 15:26:10,452 INFO L226 Difference]: Without dead ends: 27924 [2021-10-07 15:26:10,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 9032.7ms TimeCoverageRelationStatistics Valid=162, Invalid=648, Unknown=2, NotChecked=0, Total=812 [2021-10-07 15:26:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27924 states. [2021-10-07 15:26:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27924 to 18928. [2021-10-07 15:26:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18928 states, 18927 states have (on average 5.912981455064194) internal successors, (111915), 18927 states have internal predecessors, (111915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18928 states to 18928 states and 111915 transitions. [2021-10-07 15:26:11,524 INFO L78 Accepts]: Start accepts. Automaton has 18928 states and 111915 transitions. Word has length 26 [2021-10-07 15:26:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:11,525 INFO L470 AbstractCegarLoop]: Abstraction has 18928 states and 111915 transitions. [2021-10-07 15:26:11,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18928 states and 111915 transitions. [2021-10-07 15:26:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:26:11,749 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:11,749 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:11,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:11,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:11,950 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:26:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:11,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2045413883, now seen corresponding path program 24 times [2021-10-07 15:26:11,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:11,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648009836] [2021-10-07 15:26:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:26:11,953 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:11,954 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-07 15:26:13,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:26:13,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:26:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:15,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:16,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648009836] [2021-10-07 15:26:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648009836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:16,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:26:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806234505] [2021-10-07 15:26:16,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:26:16,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:26:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2021-10-07 15:26:16,171 INFO L87 Difference]: Start difference. First operand 18928 states and 111915 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:40,599 INFO L93 Difference]: Finished difference Result 39542 states and 207824 transitions. [2021-10-07 15:26:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:26:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:26:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:40,988 INFO L225 Difference]: With dead ends: 39542 [2021-10-07 15:26:40,988 INFO L226 Difference]: Without dead ends: 39542 [2021-10-07 15:26:40,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 13163.0ms TimeCoverageRelationStatistics Valid=400, Invalid=1578, Unknown=2, NotChecked=0, Total=1980 [2021-10-07 15:26:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39542 states. [2021-10-07 15:26:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39542 to 21230. [2021-10-07 15:26:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21230 states, 21229 states have (on average 6.001083423618635) internal successors, (127397), 21229 states have internal predecessors, (127397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21230 states to 21230 states and 127397 transitions. [2021-10-07 15:26:42,497 INFO L78 Accepts]: Start accepts. Automaton has 21230 states and 127397 transitions. Word has length 26 [2021-10-07 15:26:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:42,497 INFO L470 AbstractCegarLoop]: Abstraction has 21230 states and 127397 transitions. [2021-10-07 15:26:42,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21230 states and 127397 transitions. [2021-10-07 15:26:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:26:42,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:42,571 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:42,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:42,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:42,772 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:26:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash -488467324, now seen corresponding path program 25 times [2021-10-07 15:26:42,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:42,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908013584] [2021-10-07 15:26:42,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:26:42,774 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:42,775 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:42,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-07 15:26:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:26:44,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:26:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:26:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:46,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:26:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:26:46,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:26:46,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908013584] [2021-10-07 15:26:46,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908013584] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:26:46,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:26:46,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:26:46,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72649202] [2021-10-07 15:26:46,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:26:46,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:26:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:26:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-10-07 15:26:46,646 INFO L87 Difference]: Start difference. First operand 21230 states and 127397 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:26:54,877 INFO L93 Difference]: Finished difference Result 30600 states and 169777 transitions. [2021-10-07 15:26:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:26:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:26:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:26:55,068 INFO L225 Difference]: With dead ends: 30600 [2021-10-07 15:26:55,069 INFO L226 Difference]: Without dead ends: 30534 [2021-10-07 15:26:55,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6786.0ms TimeCoverageRelationStatistics Valid=127, Invalid=471, Unknown=2, NotChecked=0, Total=600 [2021-10-07 15:26:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-10-07 15:26:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 22722. [2021-10-07 15:26:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22722 states, 22721 states have (on average 6.040447163417103) internal successors, (137245), 22721 states have internal predecessors, (137245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22722 states to 22722 states and 137245 transitions. [2021-10-07 15:26:56,477 INFO L78 Accepts]: Start accepts. Automaton has 22722 states and 137245 transitions. Word has length 26 [2021-10-07 15:26:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:26:56,477 INFO L470 AbstractCegarLoop]: Abstraction has 22722 states and 137245 transitions. [2021-10-07 15:26:56,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:26:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 22722 states and 137245 transitions. [2021-10-07 15:26:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:26:56,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:26:56,597 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:26:56,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-10-07 15:26:56,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:26:56,810 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:26:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:26:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1122180228, now seen corresponding path program 26 times [2021-10-07 15:26:56,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:26:56,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515144018] [2021-10-07 15:26:56,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:26:56,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:26:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:26:56,813 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:26:56,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-07 15:26:58,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:26:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:26:58,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:26:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:00,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:00,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:00,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515144018] [2021-10-07 15:27:00,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515144018] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:00,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:00,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:27:00,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693304887] [2021-10-07 15:27:00,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:27:00,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:00,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:27:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-10-07 15:27:00,832 INFO L87 Difference]: Start difference. First operand 22722 states and 137245 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:07,125 INFO L93 Difference]: Finished difference Result 33222 states and 186487 transitions. [2021-10-07 15:27:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:27:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:27:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:07,359 INFO L225 Difference]: With dead ends: 33222 [2021-10-07 15:27:07,360 INFO L226 Difference]: Without dead ends: 33208 [2021-10-07 15:27:07,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6710.3ms TimeCoverageRelationStatistics Valid=107, Invalid=443, Unknown=2, NotChecked=0, Total=552 [2021-10-07 15:27:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33208 states. [2021-10-07 15:27:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33208 to 24258. [2021-10-07 15:27:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24258 states, 24257 states have (on average 6.066372593478171) internal successors, (147152), 24257 states have internal predecessors, (147152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 147152 transitions. [2021-10-07 15:27:08,788 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 147152 transitions. Word has length 26 [2021-10-07 15:27:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:08,791 INFO L470 AbstractCegarLoop]: Abstraction has 24258 states and 147152 transitions. [2021-10-07 15:27:08,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 147152 transitions. [2021-10-07 15:27:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:27:08,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:08,887 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:08,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:09,088 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:27:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -283862200, now seen corresponding path program 27 times [2021-10-07 15:27:09,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:09,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741412449] [2021-10-07 15:27:09,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:27:09,090 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:09,091 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:09,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-07 15:27:10,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:27:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:27:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:12,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:12,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741412449] [2021-10-07 15:27:12,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741412449] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:12,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:12,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-07 15:27:12,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983706028] [2021-10-07 15:27:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:27:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:27:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:27:12,101 INFO L87 Difference]: Start difference. First operand 24258 states and 147152 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:15,679 INFO L93 Difference]: Finished difference Result 41194 states and 230803 transitions. [2021-10-07 15:27:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:27:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-07 15:27:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:15,975 INFO L225 Difference]: With dead ends: 41194 [2021-10-07 15:27:15,976 INFO L226 Difference]: Without dead ends: 41194 [2021-10-07 15:27:15,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2177.9ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:27:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41194 states. [2021-10-07 15:27:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41194 to 27712. [2021-10-07 15:27:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27712 states, 27711 states have (on average 6.139800079390856) internal successors, (170140), 27711 states have internal predecessors, (170140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27712 states to 27712 states and 170140 transitions. [2021-10-07 15:27:17,743 INFO L78 Accepts]: Start accepts. Automaton has 27712 states and 170140 transitions. Word has length 26 [2021-10-07 15:27:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:17,743 INFO L470 AbstractCegarLoop]: Abstraction has 27712 states and 170140 transitions. [2021-10-07 15:27:17,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27712 states and 170140 transitions. [2021-10-07 15:27:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:27:17,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:17,837 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:17,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:18,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:18,038 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:27:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1591098390, now seen corresponding path program 17 times [2021-10-07 15:27:18,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:18,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512704270] [2021-10-07 15:27:18,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:27:18,040 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:18,041 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:18,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-07 15:27:19,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:27:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:19,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:27:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:19,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:20,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:20,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512704270] [2021-10-07 15:27:20,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512704270] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:20,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:20,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:27:20,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895787301] [2021-10-07 15:27:20,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:27:20,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:27:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:27:20,438 INFO L87 Difference]: Start difference. First operand 27712 states and 170140 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:23,122 INFO L93 Difference]: Finished difference Result 44110 states and 250836 transitions. [2021-10-07 15:27:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:27:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 26 [2021-10-07 15:27:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:23,436 INFO L225 Difference]: With dead ends: 44110 [2021-10-07 15:27:23,436 INFO L226 Difference]: Without dead ends: 44020 [2021-10-07 15:27:23,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:27:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44020 states. [2021-10-07 15:27:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44020 to 33900. [2021-10-07 15:27:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33900 states, 33899 states have (on average 6.102687394908404) internal successors, (206875), 33899 states have internal predecessors, (206875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33900 states to 33900 states and 206875 transitions. [2021-10-07 15:27:25,626 INFO L78 Accepts]: Start accepts. Automaton has 33900 states and 206875 transitions. Word has length 26 [2021-10-07 15:27:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 33900 states and 206875 transitions. [2021-10-07 15:27:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 33900 states and 206875 transitions. [2021-10-07 15:27:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:27:25,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:25,753 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:25,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:25,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:25,954 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:27:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash 111623758, now seen corresponding path program 18 times [2021-10-07 15:27:25,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:25,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779604498] [2021-10-07 15:27:25,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:27:25,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:25,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:25,957 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:25,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-07 15:27:27,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:27:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:27:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:28,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:28,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:28,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779604498] [2021-10-07 15:27:28,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779604498] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:28,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:28,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:27:28,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560164252] [2021-10-07 15:27:28,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:27:28,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:27:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:27:28,500 INFO L87 Difference]: Start difference. First operand 33900 states and 206875 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:32,763 INFO L93 Difference]: Finished difference Result 56956 states and 321861 transitions. [2021-10-07 15:27:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:27:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 26 [2021-10-07 15:27:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:33,242 INFO L225 Difference]: With dead ends: 56956 [2021-10-07 15:27:33,242 INFO L226 Difference]: Without dead ends: 55174 [2021-10-07 15:27:33,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1992.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:27:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55174 states. [2021-10-07 15:27:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55174 to 40568. [2021-10-07 15:27:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40568 states, 40567 states have (on average 6.005792885843173) internal successors, (243637), 40567 states have internal predecessors, (243637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40568 states to 40568 states and 243637 transitions. [2021-10-07 15:27:35,632 INFO L78 Accepts]: Start accepts. Automaton has 40568 states and 243637 transitions. Word has length 26 [2021-10-07 15:27:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 40568 states and 243637 transitions. [2021-10-07 15:27:35,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 40568 states and 243637 transitions. [2021-10-07 15:27:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:27:36,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:36,267 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:36,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2021-10-07 15:27:36,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:36,483 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:27:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1499317200, now seen corresponding path program 19 times [2021-10-07 15:27:36,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:36,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869535041] [2021-10-07 15:27:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:27:36,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:36,486 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:36,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-10-07 15:27:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:27:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:27:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:38,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:38,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:38,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869535041] [2021-10-07 15:27:38,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869535041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:38,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:38,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:27:38,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872937252] [2021-10-07 15:27:38,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:27:38,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:27:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:27:38,528 INFO L87 Difference]: Start difference. First operand 40568 states and 243637 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:27:50,795 INFO L93 Difference]: Finished difference Result 59230 states and 336524 transitions. [2021-10-07 15:27:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:27:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 26 [2021-10-07 15:27:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:27:51,253 INFO L225 Difference]: With dead ends: 59230 [2021-10-07 15:27:51,253 INFO L226 Difference]: Without dead ends: 58302 [2021-10-07 15:27:51,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:27:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58302 states. [2021-10-07 15:27:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58302 to 43322. [2021-10-07 15:27:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43322 states, 43321 states have (on average 6.071535744788902) internal successors, (263025), 43321 states have internal predecessors, (263025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43322 states to 43322 states and 263025 transitions. [2021-10-07 15:27:54,273 INFO L78 Accepts]: Start accepts. Automaton has 43322 states and 263025 transitions. Word has length 26 [2021-10-07 15:27:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:27:54,277 INFO L470 AbstractCegarLoop]: Abstraction has 43322 states and 263025 transitions. [2021-10-07 15:27:54,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:27:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 43322 states and 263025 transitions. [2021-10-07 15:27:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:27:54,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:27:54,529 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:27:54,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-10-07 15:27:54,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:27:54,744 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:27:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:27:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1880745292, now seen corresponding path program 20 times [2021-10-07 15:27:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:27:54,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870798604] [2021-10-07 15:27:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:27:54,746 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:27:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:27:54,747 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:27:54,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-10-07 15:27:56,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:27:56,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:27:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:27:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:27:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:56,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:27:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:27:56,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:27:56,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870798604] [2021-10-07 15:27:56,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870798604] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:27:56,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:27:56,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:27:56,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402227542] [2021-10-07 15:27:56,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:27:56,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:27:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:27:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:27:56,783 INFO L87 Difference]: Start difference. First operand 43322 states and 263025 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:28:19,773 INFO L93 Difference]: Finished difference Result 85640 states and 493540 transitions. [2021-10-07 15:28:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:28:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 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 26 [2021-10-07 15:28:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:28:20,880 INFO L225 Difference]: With dead ends: 85640 [2021-10-07 15:28:20,880 INFO L226 Difference]: Without dead ends: 85612 [2021-10-07 15:28:20,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1609.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:28:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85612 states. [2021-10-07 15:28:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85612 to 50848. [2021-10-07 15:28:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 6.24296418667768) internal successors, (317436), 50847 states have internal predecessors, (317436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 317436 transitions. [2021-10-07 15:28:24,441 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 317436 transitions. Word has length 26 [2021-10-07 15:28:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:28:24,441 INFO L470 AbstractCegarLoop]: Abstraction has 50848 states and 317436 transitions. [2021-10-07 15:28:24,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 317436 transitions. [2021-10-07 15:28:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:28:25,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:28:25,113 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:28:25,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-10-07 15:28:25,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:28:25,314 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:28:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:28:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1163647628, now seen corresponding path program 21 times [2021-10-07 15:28:25,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:28:25,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196224129] [2021-10-07 15:28:25,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:28:25,316 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:28:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:28:25,318 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:28:25,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-10-07 15:28:26,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:28:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:28:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:28:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:28:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:27,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:28:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:27,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:28:27,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196224129] [2021-10-07 15:28:27,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196224129] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:28:27,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:28:27,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-07 15:28:27,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450911937] [2021-10-07 15:28:27,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:28:27,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:28:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:28:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:28:27,582 INFO L87 Difference]: Start difference. First operand 50848 states and 317436 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:28:36,916 INFO L93 Difference]: Finished difference Result 81778 states and 478832 transitions. [2021-10-07 15:28:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:28:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 26 [2021-10-07 15:28:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:28:37,932 INFO L225 Difference]: With dead ends: 81778 [2021-10-07 15:28:37,932 INFO L226 Difference]: Without dead ends: 81738 [2021-10-07 15:28:37,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1812.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:28:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81738 states. [2021-10-07 15:28:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81738 to 57180. [2021-10-07 15:28:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57180 states, 57179 states have (on average 6.343097990520995) internal successors, (362692), 57179 states have internal predecessors, (362692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57180 states to 57180 states and 362692 transitions. [2021-10-07 15:28:41,393 INFO L78 Accepts]: Start accepts. Automaton has 57180 states and 362692 transitions. Word has length 26 [2021-10-07 15:28:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:28:41,393 INFO L470 AbstractCegarLoop]: Abstraction has 57180 states and 362692 transitions. [2021-10-07 15:28:41,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 57180 states and 362692 transitions. [2021-10-07 15:28:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:28:42,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:28:42,135 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:28:42,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-10-07 15:28:42,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:28:42,350 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:28:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:28:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1420111714, now seen corresponding path program 22 times [2021-10-07 15:28:42,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:28:42,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342432463] [2021-10-07 15:28:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:28:42,351 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:28:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:28:42,352 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:28:42,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-10-07 15:28:43,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:28:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:28:43,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:28:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:28:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:44,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:28:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:28:44,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:28:44,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342432463] [2021-10-07 15:28:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342432463] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:28:44,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:28:44,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:28:44,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997010724] [2021-10-07 15:28:44,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:28:44,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:28:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:28:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:28:44,323 INFO L87 Difference]: Start difference. First operand 57180 states and 362692 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:28:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:28:54,267 INFO L93 Difference]: Finished difference Result 104282 states and 611864 transitions. [2021-10-07 15:28:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 15:28:54,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 26 [2021-10-07 15:28:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:28:55,672 INFO L225 Difference]: With dead ends: 104282 [2021-10-07 15:28:55,673 INFO L226 Difference]: Without dead ends: 104254 [2021-10-07 15:28:55,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2956.4ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:28:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104254 states. [2021-10-07 15:28:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104254 to 68002. [2021-10-07 15:29:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68002 states, 68001 states have (on average 6.432243643475831) internal successors, (437399), 68001 states have internal predecessors, (437399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68002 states to 68002 states and 437399 transitions. [2021-10-07 15:29:01,249 INFO L78 Accepts]: Start accepts. Automaton has 68002 states and 437399 transitions. Word has length 26 [2021-10-07 15:29:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:01,250 INFO L470 AbstractCegarLoop]: Abstraction has 68002 states and 437399 transitions. [2021-10-07 15:29:01,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 68002 states and 437399 transitions. [2021-10-07 15:29:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:29:01,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:01,578 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:01,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:01,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:01,791 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:29:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash 52454310, now seen corresponding path program 23 times [2021-10-07 15:29:01,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:01,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125367508] [2021-10-07 15:29:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:29:01,793 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:01,794 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-10-07 15:29:03,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:29:03,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:29:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:04,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:04,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125367508] [2021-10-07 15:29:04,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125367508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:04,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:04,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:29:04,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638147788] [2021-10-07 15:29:04,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:29:04,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:29:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:29:04,071 INFO L87 Difference]: Start difference. First operand 68002 states and 437399 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:13,435 INFO L93 Difference]: Finished difference Result 95286 states and 574339 transitions. [2021-10-07 15:29:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:29:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 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 26 [2021-10-07 15:29:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:14,793 INFO L225 Difference]: With dead ends: 95286 [2021-10-07 15:29:14,793 INFO L226 Difference]: Without dead ends: 94334 [2021-10-07 15:29:14,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2035.8ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:29:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94334 states. [2021-10-07 15:29:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94334 to 71336. [2021-10-07 15:29:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71336 states, 71335 states have (on average 6.435003855050116) internal successors, (459041), 71335 states have internal predecessors, (459041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71336 states to 71336 states and 459041 transitions. [2021-10-07 15:29:19,970 INFO L78 Accepts]: Start accepts. Automaton has 71336 states and 459041 transitions. Word has length 26 [2021-10-07 15:29:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:19,970 INFO L470 AbstractCegarLoop]: Abstraction has 71336 states and 459041 transitions. [2021-10-07 15:29:19,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 71336 states and 459041 transitions. [2021-10-07 15:29:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:29:20,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:20,281 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:20,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:20,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:20,482 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:29:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2000948958, now seen corresponding path program 24 times [2021-10-07 15:29:20,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:20,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939501659] [2021-10-07 15:29:20,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:29:20,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:20,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:20,486 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:20,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-10-07 15:29:22,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:29:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:29:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:29:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:29:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:22,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:29:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:29:23,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:29:23,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939501659] [2021-10-07 15:29:23,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939501659] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:29:23,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:29:23,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-07 15:29:23,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752237363] [2021-10-07 15:29:23,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:29:23,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:29:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:29:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:29:23,322 INFO L87 Difference]: Start difference. First operand 71336 states and 459041 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:29:35,236 INFO L93 Difference]: Finished difference Result 112678 states and 679283 transitions. [2021-10-07 15:29:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:29:35,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 26 [2021-10-07 15:29:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:29:36,879 INFO L225 Difference]: With dead ends: 112678 [2021-10-07 15:29:36,879 INFO L226 Difference]: Without dead ends: 112642 [2021-10-07 15:29:36,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4105.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:29:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112642 states. [2021-10-07 15:29:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112642 to 82058. [2021-10-07 15:29:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82058 states, 82057 states have (on average 6.471464957285789) internal successors, (531029), 82057 states have internal predecessors, (531029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82058 states to 82058 states and 531029 transitions. [2021-10-07 15:29:42,419 INFO L78 Accepts]: Start accepts. Automaton has 82058 states and 531029 transitions. Word has length 26 [2021-10-07 15:29:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:29:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 82058 states and 531029 transitions. [2021-10-07 15:29:42,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:29:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 82058 states and 531029 transitions. [2021-10-07 15:29:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:29:43,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:29:43,327 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:29:43,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-10-07 15:29:43,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:29:43,543 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-07 15:29:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:29:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 925028638, now seen corresponding path program 25 times [2021-10-07 15:29:43,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:29:43,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765512405] [2021-10-07 15:29:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:29:43,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:29:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:29:43,546 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:29:43,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process