/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 16:25:58,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 16:25:58,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 16:25:58,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-07 16:25:58,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-07 16:25:58,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-07 16:25:58,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-07 16:25:58,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-07 16:25:58,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-07 16:25:58,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-07 16:25:58,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-07 16:25:58,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-07 16:25:58,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 16:25:58,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 16:25:58,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 16:25:58,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 16:25:58,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 16:25:58,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 16:25:58,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 16:25:58,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 16:25:58,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 16:25:58,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 16:25:58,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 16:25:58,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 16:25:58,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-07 16:25:58,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-07 16:25:58,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-07 16:25:58,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-07 16:25:58,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-07 16:25:58,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-07 16:25:58,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-07 16:25:58,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-07 16:25:58,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-07 16:25:58,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-07 16:25:58,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-07 16:25:58,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-07 16:25:58,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-07 16:25:58,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-07 16:25:58,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 16:25:58,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 16:25:58,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 16:25:58,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 16:25:58,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 16:25:58,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 16:25:58,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 16:25:58,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 16:25:58,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 16:25:58,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 16:25:58,664 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 16:25:58,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 16:25:58,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 16:25:58,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 16:25:58,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 16:25:58,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 16:25:58,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 16:25:58,665 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 16:25:58,666 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 16:25:58,666 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 16:25:58,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 16:25:58,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 16:25:58,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 16:25:58,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 16:25:58,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 16:25:58,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 16:25:58,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 16:25:58,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 16:25:58,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 16:25:58,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:25:58,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 16:25:58,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 16:25:58,669 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 16:25:58,669 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 16:25:58,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 16:25:58,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 16:25:58,670 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 16:25:59,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 16:25:59,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 16:25:59,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 16:25:59,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 16:25:59,152 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 16:25:59,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2021-10-07 16:25:59,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12a3bf7c/738ecefba4a04f3e81b72c8cdbf2d393/FLAG9a137dbc7 [2021-10-07 16:26:00,022 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 16:26:00,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2021-10-07 16:26:00,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12a3bf7c/738ecefba4a04f3e81b72c8cdbf2d393/FLAG9a137dbc7 [2021-10-07 16:26:00,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b12a3bf7c/738ecefba4a04f3e81b72c8cdbf2d393 [2021-10-07 16:26:00,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 16:26:00,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 16:26:00,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 16:26:00,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 16:26:00,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 16:26:00,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ddbe61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00, skipping insertion in model container [2021-10-07 16:26:00,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 16:26:00,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:26:00,597 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2422,2435] [2021-10-07 16:26:00,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:00,624 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-07 16:26:00,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 16:26:00,651 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2422,2435] [2021-10-07 16:26:00,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:00,662 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 16:26:00,695 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2422,2435] [2021-10-07 16:26:00,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 16:26:00,724 INFO L208 MainTranslator]: Completed translation [2021-10-07 16:26:00,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00 WrapperNode [2021-10-07 16:26:00,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 16:26:00,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 16:26:00,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 16:26:00,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 16:26:00,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 16:26:00,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 16:26:00,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 16:26:00,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 16:26:00,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 16:26:00,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 16:26:00,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 16:26:00,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 16:26:00,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (1/1) ... [2021-10-07 16:26:00,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 16:26:00,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 16:26:00,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 16:26:01,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 16:26:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 16:26:01,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 16:26:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 16:26:01,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 16:26:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 16:26:01,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 16:26:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 16:26:01,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 16:26:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 16:26:01,087 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 16:26:01,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 16:26:01,879 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-07 16:26:01,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:26:01 BoogieIcfgContainer [2021-10-07 16:26:01,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 16:26:01,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 16:26:01,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 16:26:01,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 16:26:01,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 04:26:00" (1/3) ... [2021-10-07 16:26:01,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c29474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:26:01, skipping insertion in model container [2021-10-07 16:26:01,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 04:26:00" (2/3) ... [2021-10-07 16:26:01,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c29474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 04:26:01, skipping insertion in model container [2021-10-07 16:26:01,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 04:26:01" (3/3) ... [2021-10-07 16:26:01,893 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2021-10-07 16:26:01,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 16:26:01,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-07 16:26:01,901 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 16:26:01,952 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,953 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,954 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,954 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,954 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,955 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,955 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,956 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,956 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,956 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,958 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,958 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,958 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,959 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,959 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,960 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,960 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,960 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,960 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,962 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,963 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,963 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,964 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,964 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,964 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,966 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,966 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,969 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,969 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,970 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,970 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,970 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,970 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,970 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,971 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,971 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,971 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,972 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,973 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,973 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,973 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,974 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,975 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,975 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,975 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,975 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,976 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,978 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,979 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,979 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,979 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,980 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,981 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,981 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,981 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,982 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,982 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,983 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,983 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,983 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,983 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,984 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,984 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,984 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,985 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,985 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,985 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,985 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,988 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,988 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,989 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,990 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,993 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,998 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:01,999 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,000 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,000 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,000 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,000 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,001 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,001 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,001 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,002 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,004 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,004 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,004 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,004 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,005 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,006 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,006 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,006 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,006 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,007 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,007 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,007 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,007 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,008 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,008 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,008 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,008 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,008 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,009 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,011 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,012 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,012 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,013 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,014 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,014 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,015 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,015 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,015 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,015 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,016 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,016 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,017 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,028 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,030 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,031 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,031 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,031 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,031 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,032 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,039 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~short6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,040 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,040 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~short14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,045 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,046 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,046 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,046 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 16:26:02,055 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 16:26:02,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 16:26:02,120 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 16:26:02,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-10-07 16:26:02,140 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 16:26:02,153 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 197 transitions, 418 flow [2021-10-07 16:26:02,156 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 197 transitions, 418 flow [2021-10-07 16:26:02,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 192 places, 197 transitions, 418 flow [2021-10-07 16:26:02,246 INFO L129 PetriNetUnfolder]: 15/194 cut-off events. [2021-10-07 16:26:02,247 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 16:26:02,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 15/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 344 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 137. Up to 2 conditions per place. [2021-10-07 16:26:02,264 INFO L116 LiptonReduction]: Number of co-enabled transitions 5658 [2021-10-07 16:26:35,753 INFO L131 LiptonReduction]: Checked pairs total: 7883 [2021-10-07 16:26:35,753 INFO L133 LiptonReduction]: Total number of compositions: 214 [2021-10-07 16:26:35,765 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2021-10-07 16:26:35,886 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:26:35,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:35,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:26:35,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 24823, now seen corresponding path program 1 times [2021-10-07 16:26:35,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:35,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524317503] [2021-10-07 16:26:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:35,932 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:35,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:35,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 16:26:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:26:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:36,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:36,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:36,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524317503] [2021-10-07 16:26:36,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524317503] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:26:36,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:26:36,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:26:36,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193181008] [2021-10-07 16:26:36,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:26:36,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:26:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:36,395 INFO L87 Difference]: Start difference. First operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:26:36,709 INFO L93 Difference]: Finished difference Result 1604 states and 6039 transitions. [2021-10-07 16:26:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:26:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:26:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:26:36,770 INFO L225 Difference]: With dead ends: 1604 [2021-10-07 16:26:36,771 INFO L226 Difference]: Without dead ends: 1604 [2021-10-07 16:26:36,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-10-07 16:26:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1602. [2021-10-07 16:26:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1326 states have (on average 4.5542986425339365) internal successors, (6039), 1601 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6039 transitions. [2021-10-07 16:26:37,004 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6039 transitions. Word has length 2 [2021-10-07 16:26:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:26:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 6039 transitions. [2021-10-07 16:26:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6039 transitions. [2021-10-07 16:26:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:26:37,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:37,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:26:37,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 16:26:37,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:26:37,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 24637, now seen corresponding path program 1 times [2021-10-07 16:26:37,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:37,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281926981] [2021-10-07 16:26:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:37,222 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:37,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:37,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 16:26:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:26:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:37,588 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:26:37,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:26:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:38,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:38,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:38,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281926981] [2021-10-07 16:26:38,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281926981] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:26:38,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:26:38,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:26:38,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099675300] [2021-10-07 16:26:38,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:26:38,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:26:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:26:38,320 INFO L87 Difference]: Start difference. First operand 1602 states and 6039 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:26:38,572 INFO L93 Difference]: Finished difference Result 1601 states and 6037 transitions. [2021-10-07 16:26:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:26:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:26:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:26:38,595 INFO L225 Difference]: With dead ends: 1601 [2021-10-07 16:26:38,595 INFO L226 Difference]: Without dead ends: 1601 [2021-10-07 16:26:38,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:26:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-10-07 16:26:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2021-10-07 16:26:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.552790346907994) internal successors, (6037), 1600 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6037 transitions. [2021-10-07 16:26:38,686 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6037 transitions. Word has length 2 [2021-10-07 16:26:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:26:38,687 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 6037 transitions. [2021-10-07 16:26:38,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6037 transitions. [2021-10-07 16:26:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 16:26:38,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:38,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 16:26:38,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 16:26:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:26:38,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash 24639, now seen corresponding path program 1 times [2021-10-07 16:26:38,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:38,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363325919] [2021-10-07 16:26:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:38,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:38,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 16:26:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 16:26:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:38,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:26:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:26:39,324 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:26:39,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:26:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:39,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:39,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:39,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363325919] [2021-10-07 16:26:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363325919] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:26:39,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:26:39,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:26:39,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196877349] [2021-10-07 16:26:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:26:39,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:26:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:39,541 INFO L87 Difference]: Start difference. First operand 1601 states and 6037 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:26:40,169 INFO L93 Difference]: Finished difference Result 1602 states and 6040 transitions. [2021-10-07 16:26:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:26:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 16:26:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:26:40,191 INFO L225 Difference]: With dead ends: 1602 [2021-10-07 16:26:40,191 INFO L226 Difference]: Without dead ends: 1602 [2021-10-07 16:26:40,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-10-07 16:26:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1602. [2021-10-07 16:26:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1327 states have (on average 4.551620195930671) internal successors, (6040), 1601 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6040 transitions. [2021-10-07 16:26:40,300 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6040 transitions. Word has length 2 [2021-10-07 16:26:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:26:40,301 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 6040 transitions. [2021-10-07 16:26:40,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6040 transitions. [2021-10-07 16:26:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:26:40,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:40,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:26:40,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 16:26:40,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:26:40,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash 769474, now seen corresponding path program 1 times [2021-10-07 16:26:40,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:40,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078572083] [2021-10-07 16:26:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:40,521 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:40,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:40,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 16:26:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:26:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:40,859 INFO L354 Elim1Store]: treesize reduction 358, result has 15.4 percent of original size [2021-10-07 16:26:40,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 215 treesize of output 250 [2021-10-07 16:26:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:26:47,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:26:47,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078572083] [2021-10-07 16:26:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078572083] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:26:47,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:26:47,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:26:47,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582975181] [2021-10-07 16:26:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:26:47,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:26:47,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:47,324 INFO L87 Difference]: Start difference. First operand 1602 states and 6040 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:26:47,771 INFO L93 Difference]: Finished difference Result 1307 states and 4778 transitions. [2021-10-07 16:26:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:26:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:26:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:26:47,788 INFO L225 Difference]: With dead ends: 1307 [2021-10-07 16:26:47,788 INFO L226 Difference]: Without dead ends: 1307 [2021-10-07 16:26:47,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:26:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-10-07 16:26:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1307. [2021-10-07 16:26:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1097 states have (on average 4.355515041020967) internal successors, (4778), 1306 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4778 transitions. [2021-10-07 16:26:47,853 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4778 transitions. Word has length 3 [2021-10-07 16:26:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:26:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 4778 transitions. [2021-10-07 16:26:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4778 transitions. [2021-10-07 16:26:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 16:26:47,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:47,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 16:26:47,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 16:26:48,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:26:48,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash 769475, now seen corresponding path program 1 times [2021-10-07 16:26:48,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:48,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415998857] [2021-10-07 16:26:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:48,073 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:48,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:48,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 16:26:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:26:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:48,453 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-07 16:26:48,453 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 41 treesize of output 85 [2021-10-07 16:26:48,478 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 107 treesize of output 105 [2021-10-07 16:26:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:59,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:26:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:26:59,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:26:59,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415998857] [2021-10-07 16:26:59,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415998857] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:26:59,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:26:59,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2021-10-07 16:26:59,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825241661] [2021-10-07 16:26:59,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:26:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:26:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:26:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:26:59,221 INFO L87 Difference]: Start difference. First operand 1307 states and 4778 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:26:59,469 INFO L93 Difference]: Finished difference Result 1012 states and 3516 transitions. [2021-10-07 16:26:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:26:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 16:26:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:26:59,482 INFO L225 Difference]: With dead ends: 1012 [2021-10-07 16:26:59,482 INFO L226 Difference]: Without dead ends: 1012 [2021-10-07 16:26:59,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 16:26:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-10-07 16:26:59,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1012. [2021-10-07 16:26:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 867 states have (on average 4.055363321799308) internal successors, (3516), 1011 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3516 transitions. [2021-10-07 16:26:59,525 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3516 transitions. Word has length 3 [2021-10-07 16:26:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:26:59,525 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3516 transitions. [2021-10-07 16:26:59,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:26:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3516 transitions. [2021-10-07 16:26:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 16:26:59,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:26:59,526 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 16:26:59,540 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 16:26:59,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:26:59,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:26:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:26:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash 23853471, now seen corresponding path program 1 times [2021-10-07 16:26:59,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:26:59,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337682032] [2021-10-07 16:26:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:26:59,742 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:26:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:26:59,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:26:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 16:26:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:26:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:26:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:26:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:26:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:00,063 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:00,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:00,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:00,700 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:00,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337682032] [2021-10-07 16:27:00,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337682032] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:00,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:27:00,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263044065] [2021-10-07 16:27:00,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:00,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:00,703 INFO L87 Difference]: Start difference. First operand 1012 states and 3516 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:02,715 INFO L93 Difference]: Finished difference Result 5044 states and 17560 transitions. [2021-10-07 16:27:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:27:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 16:27:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:02,777 INFO L225 Difference]: With dead ends: 5044 [2021-10-07 16:27:02,777 INFO L226 Difference]: Without dead ends: 5044 [2021-10-07 16:27:02,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-10-07 16:27:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 1016. [2021-10-07 16:27:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 871 states have (on average 4.045924225028703) internal successors, (3524), 1015 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3524 transitions. [2021-10-07 16:27:02,904 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3524 transitions. Word has length 4 [2021-10-07 16:27:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:02,905 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3524 transitions. [2021-10-07 16:27:02,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3524 transitions. [2021-10-07 16:27:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:27:02,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:02,906 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:27:02,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:03,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:03,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 739480572, now seen corresponding path program 1 times [2021-10-07 16:27:03,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:03,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850732268] [2021-10-07 16:27:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:03,133 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:03,137 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:03,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 16:27:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 16:27:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:03,482 INFO L354 Elim1Store]: treesize reduction 235, result has 20.6 percent of original size [2021-10-07 16:27:03,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 89 [2021-10-07 16:27:03,493 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 480 treesize of output 448 [2021-10-07 16:27:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:08,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:09,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:09,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850732268] [2021-10-07 16:27:09,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850732268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:09,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:09,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:27:09,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233426880] [2021-10-07 16:27:09,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:09,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:09,143 INFO L87 Difference]: Start difference. First operand 1016 states and 3524 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:10,039 INFO L93 Difference]: Finished difference Result 1925 states and 6739 transitions. [2021-10-07 16:27:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:27:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:27:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:10,056 INFO L225 Difference]: With dead ends: 1925 [2021-10-07 16:27:10,057 INFO L226 Difference]: Without dead ends: 1925 [2021-10-07 16:27:10,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-10-07 16:27:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 967. [2021-10-07 16:27:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 842 states have (on average 4.010688836104513) internal successors, (3377), 966 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3377 transitions. [2021-10-07 16:27:10,105 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3377 transitions. Word has length 5 [2021-10-07 16:27:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:10,106 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3377 transitions. [2021-10-07 16:27:10,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3377 transitions. [2021-10-07 16:27:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 16:27:10,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:10,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 16:27:10,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:10,321 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash 739480574, now seen corresponding path program 1 times [2021-10-07 16:27:10,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:10,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535698602] [2021-10-07 16:27:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:10,324 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:10,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:10,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:10,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 16:27:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:27:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:10,650 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:10,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 157 treesize of output 194 [2021-10-07 16:27:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:17,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:17,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535698602] [2021-10-07 16:27:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535698602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:17,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:17,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 16:27:17,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607310606] [2021-10-07 16:27:17,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:17,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:17,098 INFO L87 Difference]: Start difference. First operand 967 states and 3377 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:17,333 INFO L93 Difference]: Finished difference Result 918 states and 3230 transitions. [2021-10-07 16:27:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 16:27:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:17,348 INFO L225 Difference]: With dead ends: 918 [2021-10-07 16:27:17,348 INFO L226 Difference]: Without dead ends: 918 [2021-10-07 16:27:17,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-10-07 16:27:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2021-10-07 16:27:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 813 states have (on average 3.972939729397294) internal successors, (3230), 917 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3230 transitions. [2021-10-07 16:27:17,385 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3230 transitions. Word has length 5 [2021-10-07 16:27:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:17,385 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 3230 transitions. [2021-10-07 16:27:17,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3230 transitions. [2021-10-07 16:27:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:27:17,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:17,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:27:17,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:17,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:17,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054840, now seen corresponding path program 1 times [2021-10-07 16:27:17,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:17,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330460162] [2021-10-07 16:27:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:17,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:17,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:17,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 16:27:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 16:27:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:17,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-07 16:27:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:18,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:18,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330460162] [2021-10-07 16:27:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330460162] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:18,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:27:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689342962] [2021-10-07 16:27:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:27:18,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:27:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:18,099 INFO L87 Difference]: Start difference. First operand 918 states and 3230 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:19,697 INFO L93 Difference]: Finished difference Result 4091 states and 14753 transitions. [2021-10-07 16:27:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:27:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:27:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:19,723 INFO L225 Difference]: With dead ends: 4091 [2021-10-07 16:27:19,723 INFO L226 Difference]: Without dead ends: 4091 [2021-10-07 16:27:19,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:27:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-10-07 16:27:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 1032. [2021-10-07 16:27:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 927 states have (on average 4.405609492988134) internal successors, (4084), 1031 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 4084 transitions. [2021-10-07 16:27:19,799 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 4084 transitions. Word has length 6 [2021-10-07 16:27:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 4084 transitions. [2021-10-07 16:27:19,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 4084 transitions. [2021-10-07 16:27:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:27:19,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:19,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:27:19,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:20,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054841, now seen corresponding path program 1 times [2021-10-07 16:27:20,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:20,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346178577] [2021-10-07 16:27:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:20,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:20,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:20,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:20,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 16:27:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:20,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 16:27:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:20,318 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:20,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:27:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:20,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:20,895 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:20,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346178577] [2021-10-07 16:27:20,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346178577] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:20,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:20,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:27:20,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053261923] [2021-10-07 16:27:20,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:20,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:20,897 INFO L87 Difference]: Start difference. First operand 1032 states and 4084 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:21,100 INFO L93 Difference]: Finished difference Result 694 states and 2692 transitions. [2021-10-07 16:27:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:27:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:27:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:21,105 INFO L225 Difference]: With dead ends: 694 [2021-10-07 16:27:21,105 INFO L226 Difference]: Without dead ends: 694 [2021-10-07 16:27:21,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 16:27:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-07 16:27:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2021-10-07 16:27:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 642 states have (on average 4.193146417445483) internal successors, (2692), 693 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2692 transitions. [2021-10-07 16:27:21,135 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2692 transitions. Word has length 6 [2021-10-07 16:27:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:21,136 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2692 transitions. [2021-10-07 16:27:21,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2692 transitions. [2021-10-07 16:27:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 16:27:21,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:21,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 16:27:21,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:21,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:21,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1449054915, now seen corresponding path program 1 times [2021-10-07 16:27:21,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:21,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266283075] [2021-10-07 16:27:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:21,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:21,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:21,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:21,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 16:27:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:27:21,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:21,719 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:21,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:22,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:22,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266283075] [2021-10-07 16:27:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266283075] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:22,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:22,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:27:22,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262666336] [2021-10-07 16:27:22,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:22,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:22,202 INFO L87 Difference]: Start difference. First operand 694 states and 2692 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:23,041 INFO L93 Difference]: Finished difference Result 1378 states and 5454 transitions. [2021-10-07 16:27:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:27:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 16:27:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:23,050 INFO L225 Difference]: With dead ends: 1378 [2021-10-07 16:27:23,051 INFO L226 Difference]: Without dead ends: 1378 [2021-10-07 16:27:23,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:27:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-10-07 16:27:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1038. [2021-10-07 16:27:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 986 states have (on average 4.557809330628803) internal successors, (4494), 1037 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 4494 transitions. [2021-10-07 16:27:23,097 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 4494 transitions. Word has length 6 [2021-10-07 16:27:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:23,098 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 4494 transitions. [2021-10-07 16:27:23,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 4494 transitions. [2021-10-07 16:27:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:27:23,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:23,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:23,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:23,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:23,313 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1971030898, now seen corresponding path program 1 times [2021-10-07 16:27:23,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:23,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383680444] [2021-10-07 16:27:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:23,315 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:23,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:23,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:23,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 16:27:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:27:23,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:23,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:23,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:23,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383680444] [2021-10-07 16:27:23,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383680444] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:23,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:23,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-07 16:27:23,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543895191] [2021-10-07 16:27:23,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:23,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:23,461 INFO L87 Difference]: Start difference. First operand 1038 states and 4494 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:23,556 INFO L93 Difference]: Finished difference Result 1120 states and 4296 transitions. [2021-10-07 16:27:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:27:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:27:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:23,566 INFO L225 Difference]: With dead ends: 1120 [2021-10-07 16:27:23,566 INFO L226 Difference]: Without dead ends: 1120 [2021-10-07 16:27:23,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-10-07 16:27:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 952. [2021-10-07 16:27:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 900 states have (on average 4.277777777777778) internal successors, (3850), 951 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3850 transitions. [2021-10-07 16:27:23,605 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3850 transitions. Word has length 7 [2021-10-07 16:27:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:23,606 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 3850 transitions. [2021-10-07 16:27:23,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3850 transitions. [2021-10-07 16:27:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:27:23,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:23,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:23,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:23,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:23,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1971243794, now seen corresponding path program 1 times [2021-10-07 16:27:23,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:23,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684806583] [2021-10-07 16:27:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:23,822 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:23,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:23,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:23,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 16:27:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:27:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:24,212 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-07 16:27:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-07 16:27:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:24,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:24,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:24,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684806583] [2021-10-07 16:27:24,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684806583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:24,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 16:27:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958258713] [2021-10-07 16:27:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:27:24,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:27:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:24,734 INFO L87 Difference]: Start difference. First operand 952 states and 3850 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:24,865 INFO L93 Difference]: Finished difference Result 887 states and 3608 transitions. [2021-10-07 16:27:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:27:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:24,871 INFO L225 Difference]: With dead ends: 887 [2021-10-07 16:27:24,872 INFO L226 Difference]: Without dead ends: 887 [2021-10-07 16:27:24,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-10-07 16:27:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2021-10-07 16:27:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 847 states have (on average 4.259740259740259) internal successors, (3608), 886 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3608 transitions. [2021-10-07 16:27:24,906 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3608 transitions. Word has length 7 [2021-10-07 16:27:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:24,906 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 3608 transitions. [2021-10-07 16:27:24,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3608 transitions. [2021-10-07 16:27:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 16:27:24,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:24,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:24,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-07 16:27:25,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:25,121 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1971243796, now seen corresponding path program 1 times [2021-10-07 16:27:25,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:25,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654275713] [2021-10-07 16:27:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:25,122 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:25,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:25,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 16:27:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 16:27:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:25,515 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:25,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:26,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:26,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654275713] [2021-10-07 16:27:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654275713] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:26,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 16:27:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101015360] [2021-10-07 16:27:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:26,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:26,085 INFO L87 Difference]: Start difference. First operand 887 states and 3608 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:26,592 INFO L93 Difference]: Finished difference Result 1635 states and 6717 transitions. [2021-10-07 16:27:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:27:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-07 16:27:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:26,600 INFO L225 Difference]: With dead ends: 1635 [2021-10-07 16:27:26,601 INFO L226 Difference]: Without dead ends: 1635 [2021-10-07 16:27:26,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-10-07 16:27:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 822. [2021-10-07 16:27:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 794 states have (on average 4.239294710327456) internal successors, (3366), 821 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 3366 transitions. [2021-10-07 16:27:26,639 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 3366 transitions. Word has length 7 [2021-10-07 16:27:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:26,640 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 3366 transitions. [2021-10-07 16:27:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 3366 transitions. [2021-10-07 16:27:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:27:26,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:26,641 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-07 16:27:26,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-07 16:27:26,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:26,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash 462857311, now seen corresponding path program 2 times [2021-10-07 16:27:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:26,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462983235] [2021-10-07 16:27:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:27:26,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:26,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:26,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 16:27:26,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:27:26,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:27:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 16:27:26,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:27,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:27,219 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:27,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:27,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:28,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:28,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462983235] [2021-10-07 16:27:28,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462983235] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:28,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:28,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:27:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816359682] [2021-10-07 16:27:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:27:28,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:27:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:27:28,941 INFO L87 Difference]: Start difference. First operand 822 states and 3366 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:38,831 INFO L93 Difference]: Finished difference Result 10586 states and 43594 transitions. [2021-10-07 16:27:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:27:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:27:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:38,881 INFO L225 Difference]: With dead ends: 10586 [2021-10-07 16:27:38,881 INFO L226 Difference]: Without dead ends: 10586 [2021-10-07 16:27:38,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5532.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:27:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-10-07 16:27:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 830. [2021-10-07 16:27:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 802 states have (on average 4.216957605985037) internal successors, (3382), 829 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 3382 transitions. [2021-10-07 16:27:39,020 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 3382 transitions. Word has length 8 [2021-10-07 16:27:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 3382 transitions. [2021-10-07 16:27:39,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 3382 transitions. [2021-10-07 16:27:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 16:27:39,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:39,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:39,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:39,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:39,237 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash 979009095, now seen corresponding path program 1 times [2021-10-07 16:27:39,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:39,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051547927] [2021-10-07 16:27:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:39,240 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:39,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:39,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 16:27:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:39,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:27:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:39,627 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:39,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:39,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:40,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:40,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051547927] [2021-10-07 16:27:40,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051547927] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:40,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:40,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:27:40,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580179315] [2021-10-07 16:27:40,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:27:40,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:40,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:27:40,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:27:40,181 INFO L87 Difference]: Start difference. First operand 830 states and 3382 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:41,086 INFO L93 Difference]: Finished difference Result 1622 states and 6938 transitions. [2021-10-07 16:27:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 16:27:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 16:27:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:41,094 INFO L225 Difference]: With dead ends: 1622 [2021-10-07 16:27:41,094 INFO L226 Difference]: Without dead ends: 1622 [2021-10-07 16:27:41,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:27:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-10-07 16:27:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1220. [2021-10-07 16:27:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1192 states have (on average 4.701342281879195) internal successors, (5604), 1219 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 5604 transitions. [2021-10-07 16:27:41,143 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 5604 transitions. Word has length 8 [2021-10-07 16:27:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:41,144 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 5604 transitions. [2021-10-07 16:27:41,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 5604 transitions. [2021-10-07 16:27:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:27:41,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:41,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:41,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:41,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:41,358 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 79372718, now seen corresponding path program 1 times [2021-10-07 16:27:41,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:41,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693204751] [2021-10-07 16:27:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:41,360 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:41,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:41,362 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:41,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 16:27:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:27:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:27:41,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:27:41,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:41,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693204751] [2021-10-07 16:27:41,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693204751] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:41,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:41,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:27:41,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193723176] [2021-10-07 16:27:41,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:27:41,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:27:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:41,566 INFO L87 Difference]: Start difference. First operand 1220 states and 5604 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:41,624 INFO L93 Difference]: Finished difference Result 1322 states and 5626 transitions. [2021-10-07 16:27:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:27:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:27:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:41,631 INFO L225 Difference]: With dead ends: 1322 [2021-10-07 16:27:41,631 INFO L226 Difference]: Without dead ends: 1322 [2021-10-07 16:27:41,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:27:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-10-07 16:27:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1110. [2021-10-07 16:27:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1091 states have (on average 4.5270394133822185) internal successors, (4939), 1109 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4939 transitions. [2021-10-07 16:27:41,671 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4939 transitions. Word has length 9 [2021-10-07 16:27:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:41,671 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 4939 transitions. [2021-10-07 16:27:41,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4939 transitions. [2021-10-07 16:27:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 16:27:41,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:41,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:41,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:41,885 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 284512916, now seen corresponding path program 1 times [2021-10-07 16:27:41,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:41,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784838460] [2021-10-07 16:27:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:41,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:41,889 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:41,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 16:27:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 16:27:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:42,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:42,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:42,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784838460] [2021-10-07 16:27:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784838460] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:27:42,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:27:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-07 16:27:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881102514] [2021-10-07 16:27:42,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:27:42,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:27:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:42,087 INFO L87 Difference]: Start difference. First operand 1110 states and 4939 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:42,167 INFO L93 Difference]: Finished difference Result 1240 states and 5184 transitions. [2021-10-07 16:27:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:27:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 16:27:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:42,172 INFO L225 Difference]: With dead ends: 1240 [2021-10-07 16:27:42,173 INFO L226 Difference]: Without dead ends: 1240 [2021-10-07 16:27:42,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:27:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-10-07 16:27:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1110. [2021-10-07 16:27:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1091 states have (on average 4.418881759853345) internal successors, (4821), 1109 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4821 transitions. [2021-10-07 16:27:42,213 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4821 transitions. Word has length 9 [2021-10-07 16:27:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 4821 transitions. [2021-10-07 16:27:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4821 transitions. [2021-10-07 16:27:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:27:42,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:42,215 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:42,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-07 16:27:42,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:42,426 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1834437045, now seen corresponding path program 1 times [2021-10-07 16:27:42,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:42,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223525752] [2021-10-07 16:27:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:42,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:42,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:42,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 16:27:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:27:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:42,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:42,888 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:43,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:44,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:44,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223525752] [2021-10-07 16:27:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223525752] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:44,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 16:27:44,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420427148] [2021-10-07 16:27:44,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:27:44,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:27:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:27:44,018 INFO L87 Difference]: Start difference. First operand 1110 states and 4821 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:45,893 INFO L93 Difference]: Finished difference Result 1653 states and 6786 transitions. [2021-10-07 16:27:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:27:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:27:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:45,906 INFO L225 Difference]: With dead ends: 1653 [2021-10-07 16:27:45,906 INFO L226 Difference]: Without dead ends: 1651 [2021-10-07 16:27:45,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:27:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-10-07 16:27:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1439. [2021-10-07 16:27:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1412 states have (on average 4.327195467422096) internal successors, (6110), 1438 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 6110 transitions. [2021-10-07 16:27:45,962 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 6110 transitions. Word has length 10 [2021-10-07 16:27:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:45,963 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 6110 transitions. [2021-10-07 16:27:45,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 6110 transitions. [2021-10-07 16:27:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:27:45,964 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:45,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:45,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:46,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:46,178 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash 236583197, now seen corresponding path program 1 times [2021-10-07 16:27:46,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:46,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675090769] [2021-10-07 16:27:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:46,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:46,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:46,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 16:27:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:27:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:46,626 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:46,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:46,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:47,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:47,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675090769] [2021-10-07 16:27:47,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675090769] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:47,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:47,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:27:47,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917459875] [2021-10-07 16:27:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:27:47,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:27:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:47,715 INFO L87 Difference]: Start difference. First operand 1439 states and 6110 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:52,790 INFO L93 Difference]: Finished difference Result 3386 states and 14396 transitions. [2021-10-07 16:27:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 16:27:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:27:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:52,806 INFO L225 Difference]: With dead ends: 3386 [2021-10-07 16:27:52,806 INFO L226 Difference]: Without dead ends: 3386 [2021-10-07 16:27:52,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2366.3ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:27:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-10-07 16:27:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2038. [2021-10-07 16:27:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2011 states have (on average 4.545997016409746) internal successors, (9142), 2037 states have internal predecessors, (9142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 9142 transitions. [2021-10-07 16:27:52,888 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 9142 transitions. Word has length 10 [2021-10-07 16:27:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:52,889 INFO L470 AbstractCegarLoop]: Abstraction has 2038 states and 9142 transitions. [2021-10-07 16:27:52,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 9142 transitions. [2021-10-07 16:27:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:27:52,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:52,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:52,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:53,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:53,104 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:53,104 INFO L82 PathProgramCache]: Analyzing trace with hash 236583231, now seen corresponding path program 1 times [2021-10-07 16:27:53,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:53,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987236694] [2021-10-07 16:27:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:53,105 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:53,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:53,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 16:27:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 16:27:53,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:53,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:27:53,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987236694] [2021-10-07 16:27:53,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987236694] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:53,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:53,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:27:53,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778743425] [2021-10-07 16:27:53,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:27:53,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:27:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:53,751 INFO L87 Difference]: Start difference. First operand 2038 states and 9142 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:54,496 INFO L93 Difference]: Finished difference Result 2012 states and 8706 transitions. [2021-10-07 16:27:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:27:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:27:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:54,507 INFO L225 Difference]: With dead ends: 2012 [2021-10-07 16:27:54,507 INFO L226 Difference]: Without dead ends: 2006 [2021-10-07 16:27:54,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:27:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-10-07 16:27:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1966. [2021-10-07 16:27:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1945 states have (on average 4.415938303341902) internal successors, (8589), 1965 states have internal predecessors, (8589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 8589 transitions. [2021-10-07 16:27:54,567 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 8589 transitions. Word has length 10 [2021-10-07 16:27:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:54,567 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 8589 transitions. [2021-10-07 16:27:54,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 8589 transitions. [2021-10-07 16:27:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 16:27:54,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:54,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:27:54,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-07 16:27:54,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:54,781 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash 229880861, now seen corresponding path program 1 times [2021-10-07 16:27:54,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:54,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435412550] [2021-10-07 16:27:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:27:54,783 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:54,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:54,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:54,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 16:27:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:27:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 16:27:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:55,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:55,145 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 11 treesize of output 9 [2021-10-07 16:27:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:27:55,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:55,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435412550] [2021-10-07 16:27:55,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435412550] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:55,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:55,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-07 16:27:55,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531009782] [2021-10-07 16:27:55,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 16:27:55,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 16:27:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:27:55,330 INFO L87 Difference]: Start difference. First operand 1966 states and 8589 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:27:56,446 INFO L93 Difference]: Finished difference Result 4858 states and 20195 transitions. [2021-10-07 16:27:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:27:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 16:27:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:27:56,472 INFO L225 Difference]: With dead ends: 4858 [2021-10-07 16:27:56,472 INFO L226 Difference]: Without dead ends: 4858 [2021-10-07 16:27:56,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:27:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-10-07 16:27:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 2176. [2021-10-07 16:27:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2155 states have (on average 4.558236658932715) internal successors, (9823), 2175 states have internal predecessors, (9823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 9823 transitions. [2021-10-07 16:27:56,588 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 9823 transitions. Word has length 10 [2021-10-07 16:27:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:27:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 9823 transitions. [2021-10-07 16:27:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:27:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 9823 transitions. [2021-10-07 16:27:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:27:56,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:27:56,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-07 16:27:56,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-07 16:27:56,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:27:56,803 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:27:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:27:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2116282346, now seen corresponding path program 2 times [2021-10-07 16:27:56,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:27:56,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987465159] [2021-10-07 16:27:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:27:56,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:27:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:27:56,807 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:27:56,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 16:27:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:27:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:27:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:27:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:27:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:27:57,378 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:27:57,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:27:57,749 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 16:27:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:27:59,011 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 16:27:59,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:27:59,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987465159] [2021-10-07 16:27:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987465159] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:27:59,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:27:59,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:27:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775606384] [2021-10-07 16:27:59,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:27:59,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:27:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:27:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:27:59,014 INFO L87 Difference]: Start difference. First operand 2176 states and 9823 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:03,834 INFO L93 Difference]: Finished difference Result 5573 states and 24098 transitions. [2021-10-07 16:28:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:28:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:28:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:03,862 INFO L225 Difference]: With dead ends: 5573 [2021-10-07 16:28:03,863 INFO L226 Difference]: Without dead ends: 5571 [2021-10-07 16:28:03,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2727.6ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:28:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-10-07 16:28:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 2865. [2021-10-07 16:28:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2838 states have (on average 4.638125440451022) internal successors, (13163), 2864 states have internal predecessors, (13163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13163 transitions. [2021-10-07 16:28:04,001 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13163 transitions. Word has length 11 [2021-10-07 16:28:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:04,002 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 13163 transitions. [2021-10-07 16:28:04,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13163 transitions. [2021-10-07 16:28:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:28:04,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:04,004 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:04,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:04,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:04,218 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -45262070, now seen corresponding path program 2 times [2021-10-07 16:28:04,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:04,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337201982] [2021-10-07 16:28:04,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:28:04,220 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:04,221 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:04,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 16:28:04,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 16:28:04,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 16:28:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:04,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:04,752 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:28:05,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:28:07,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:07,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337201982] [2021-10-07 16:28:07,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337201982] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:28:07,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:28:07,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-07 16:28:07,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991162211] [2021-10-07 16:28:07,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 16:28:07,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:07,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 16:28:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-07 16:28:07,185 INFO L87 Difference]: Start difference. First operand 2865 states and 13163 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:07,880 INFO L93 Difference]: Finished difference Result 2261 states and 10073 transitions. [2021-10-07 16:28:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 16:28:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:28:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:07,890 INFO L225 Difference]: With dead ends: 2261 [2021-10-07 16:28:07,890 INFO L226 Difference]: Without dead ends: 2253 [2021-10-07 16:28:07,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-07 16:28:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-10-07 16:28:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1546. [2021-10-07 16:28:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1537 states have (on average 4.275862068965517) internal successors, (6572), 1545 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 6572 transitions. [2021-10-07 16:28:07,951 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 6572 transitions. Word has length 11 [2021-10-07 16:28:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:07,952 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 6572 transitions. [2021-10-07 16:28:07,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 6572 transitions. [2021-10-07 16:28:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 16:28:07,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:07,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:07,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:08,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:08,167 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1463624418, now seen corresponding path program 1 times [2021-10-07 16:28:08,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:08,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882378834] [2021-10-07 16:28:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:08,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:08,171 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:08,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 16:28:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 16:28:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:28:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 16:28:08,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:08,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882378834] [2021-10-07 16:28:08,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882378834] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:28:08,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:28:08,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-07 16:28:08,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785822394] [2021-10-07 16:28:08,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 16:28:08,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 16:28:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:28:08,455 INFO L87 Difference]: Start difference. First operand 1546 states and 6572 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:08,527 INFO L93 Difference]: Finished difference Result 1536 states and 6082 transitions. [2021-10-07 16:28:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 16:28:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 16:28:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:08,535 INFO L225 Difference]: With dead ends: 1536 [2021-10-07 16:28:08,535 INFO L226 Difference]: Without dead ends: 1522 [2021-10-07 16:28:08,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 16:28:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-10-07 16:28:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1374. [2021-10-07 16:28:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1368 states have (on average 4.095029239766082) internal successors, (5602), 1373 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 5602 transitions. [2021-10-07 16:28:08,579 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 5602 transitions. Word has length 11 [2021-10-07 16:28:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:08,580 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 5602 transitions. [2021-10-07 16:28:08,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 5602 transitions. [2021-10-07 16:28:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:28:08,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:08,581 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2021-10-07 16:28:08,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:08,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:08,800 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2031415211, now seen corresponding path program 3 times [2021-10-07 16:28:08,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:08,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013865064] [2021-10-07 16:28:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:28:08,802 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:08,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:08,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 16:28:09,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:28:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:28:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:09,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:09,422 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:09,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:11,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:11,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013865064] [2021-10-07 16:28:11,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013865064] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:11,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:11,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-07 16:28:11,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309849830] [2021-10-07 16:28:11,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 16:28:11,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 16:28:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:28:11,946 INFO L87 Difference]: Start difference. First operand 1374 states and 5602 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:26,814 INFO L93 Difference]: Finished difference Result 3098 states and 12649 transitions. [2021-10-07 16:28:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:28:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:28:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:26,827 INFO L225 Difference]: With dead ends: 3098 [2021-10-07 16:28:26,827 INFO L226 Difference]: Without dead ends: 3098 [2021-10-07 16:28:26,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5927.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:28:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-10-07 16:28:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1966. [2021-10-07 16:28:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1960 states have (on average 4.256122448979592) internal successors, (8342), 1965 states have internal predecessors, (8342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 8342 transitions. [2021-10-07 16:28:26,887 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 8342 transitions. Word has length 12 [2021-10-07 16:28:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:26,887 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 8342 transitions. [2021-10-07 16:28:26,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 8342 transitions. [2021-10-07 16:28:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 16:28:26,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:26,889 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:26,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:27,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:27,090 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1872197005, now seen corresponding path program 1 times [2021-10-07 16:28:27,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:27,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771282650] [2021-10-07 16:28:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:28:27,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:27,095 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:27,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 16:28:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:28:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 16:28:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:27,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:27,595 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:28:27,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:28,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:28,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771282650] [2021-10-07 16:28:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771282650] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:28,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:28,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 16:28:28,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934563544] [2021-10-07 16:28:28,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:28:28,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:28:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:28:28,938 INFO L87 Difference]: Start difference. First operand 1966 states and 8342 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:30,406 INFO L93 Difference]: Finished difference Result 1838 states and 7747 transitions. [2021-10-07 16:28:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 16:28:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 16:28:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:30,415 INFO L225 Difference]: With dead ends: 1838 [2021-10-07 16:28:30,415 INFO L226 Difference]: Without dead ends: 1782 [2021-10-07 16:28:30,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 958.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-07 16:28:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-07 16:28:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1774. [2021-10-07 16:28:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1768 states have (on average 4.290723981900452) internal successors, (7586), 1773 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 7586 transitions. [2021-10-07 16:28:30,475 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 7586 transitions. Word has length 12 [2021-10-07 16:28:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:30,475 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 7586 transitions. [2021-10-07 16:28:30,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 7586 transitions. [2021-10-07 16:28:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 16:28:30,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:30,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:30,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:30,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:30,694 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:30,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1601802392, now seen corresponding path program 2 times [2021-10-07 16:28:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:30,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261900048] [2021-10-07 16:28:30,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:28:30,696 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:30,697 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:30,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 16:28:31,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:28:31,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 16:28:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:31,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:31,363 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:31,789 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 16:28:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:33,185 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 16:28:33,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:33,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261900048] [2021-10-07 16:28:33,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261900048] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:33,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:33,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 16:28:33,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905769519] [2021-10-07 16:28:33,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 16:28:33,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 16:28:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-07 16:28:33,187 INFO L87 Difference]: Start difference. First operand 1774 states and 7586 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:37,585 INFO L93 Difference]: Finished difference Result 2376 states and 9359 transitions. [2021-10-07 16:28:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 16:28:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 16:28:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:37,597 INFO L225 Difference]: With dead ends: 2376 [2021-10-07 16:28:37,597 INFO L226 Difference]: Without dead ends: 2280 [2021-10-07 16:28:37,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2846.8ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:28:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-10-07 16:28:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1632. [2021-10-07 16:28:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1627 states have (on average 4.238475722188076) internal successors, (6896), 1631 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 6896 transitions. [2021-10-07 16:28:37,636 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 6896 transitions. Word has length 13 [2021-10-07 16:28:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:37,636 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 6896 transitions. [2021-10-07 16:28:37,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 6896 transitions. [2021-10-07 16:28:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 16:28:37,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:37,638 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:28:37,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 16:28:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:37,839 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1809503981, now seen corresponding path program 3 times [2021-10-07 16:28:37,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:37,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299887860] [2021-10-07 16:28:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:28:37,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:37,843 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:37,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 16:28:38,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 16:28:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:28:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:38,492 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:28:38,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 16:28:40,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:40,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299887860] [2021-10-07 16:28:40,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299887860] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:40,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:40,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 16:28:40,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879119384] [2021-10-07 16:28:40,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 16:28:40,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 16:28:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:28:40,006 INFO L87 Difference]: Start difference. First operand 1632 states and 6896 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:28:43,303 INFO L93 Difference]: Finished difference Result 4490 states and 19114 transitions. [2021-10-07 16:28:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 16:28:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 16:28:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:28:43,339 INFO L225 Difference]: With dead ends: 4490 [2021-10-07 16:28:43,340 INFO L226 Difference]: Without dead ends: 4490 [2021-10-07 16:28:43,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1665.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-10-07 16:28:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2021-10-07 16:28:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 2768. [2021-10-07 16:28:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2763 states have (on average 4.542888165038002) internal successors, (12552), 2767 states have internal predecessors, (12552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 12552 transitions. [2021-10-07 16:28:43,444 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 12552 transitions. Word has length 14 [2021-10-07 16:28:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:28:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 12552 transitions. [2021-10-07 16:28:43,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:28:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 12552 transitions. [2021-10-07 16:28:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 16:28:43,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:28:43,447 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-07 16:28:43,465 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 16:28:43,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:28:43,661 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:28:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:28:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1814157791, now seen corresponding path program 3 times [2021-10-07 16:28:43,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:28:43,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180446532] [2021-10-07 16:28:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:28:43,663 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:28:43,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:28:43,665 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:28:43,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 16:28:44,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-07 16:28:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:28:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 16:28:44,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:28:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:28:44,536 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:28:44,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:28:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:45,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:28:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:28:52,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:28:52,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180446532] [2021-10-07 16:28:52,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180446532] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:28:52,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:28:52,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 16:28:52,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169173979] [2021-10-07 16:28:52,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 16:28:52,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:28:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 16:28:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-07 16:28:52,698 INFO L87 Difference]: Start difference. First operand 2768 states and 12552 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:29:06,479 WARN L207 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-07 16:29:14,416 WARN L207 SmtUtils]: Spent 6.75 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-07 16:29:20,589 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-07 16:30:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:30:00,889 INFO L93 Difference]: Finished difference Result 66726 states and 313205 transitions. [2021-10-07 16:30:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:30:00,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 16:30:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:30:01,914 INFO L225 Difference]: With dead ends: 66726 [2021-10-07 16:30:01,915 INFO L226 Difference]: Without dead ends: 66726 [2021-10-07 16:30:01,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 56624.0ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:30:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66726 states. [2021-10-07 16:30:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66726 to 2784. [2021-10-07 16:30:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2779 states have (on average 4.5282475710687295) internal successors, (12584), 2783 states have internal predecessors, (12584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 12584 transitions. [2021-10-07 16:30:03,593 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 12584 transitions. Word has length 16 [2021-10-07 16:30:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:30:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 12584 transitions. [2021-10-07 16:30:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 12584 transitions. [2021-10-07 16:30:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 16:30:03,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:30:03,600 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1] [2021-10-07 16:30:03,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 16:30:03,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:30:03,814 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:30:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:30:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -274445637, now seen corresponding path program 4 times [2021-10-07 16:30:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:30:03,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675477751] [2021-10-07 16:30:03,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:30:03,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:30:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:30:03,818 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:30:03,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 16:30:04,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:30:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:30:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:30:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:30:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:04,451 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:30:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:30:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:30:04,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:30:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:30:08,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:30:08,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675477751] [2021-10-07 16:30:08,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675477751] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:30:08,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:30:08,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-10-07 16:30:08,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574181242] [2021-10-07 16:30:08,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:30:08,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:30:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:30:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:30:08,063 INFO L87 Difference]: Start difference. First operand 2784 states and 12584 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 16:30:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:30:17,358 INFO L93 Difference]: Finished difference Result 6431 states and 26890 transitions. [2021-10-07 16:30:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 16:30:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 20 [2021-10-07 16:30:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:30:17,457 INFO L225 Difference]: With dead ends: 6431 [2021-10-07 16:30:17,457 INFO L226 Difference]: Without dead ends: 6415 [2021-10-07 16:30:17,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6935.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1207, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 16:30:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6415 states. [2021-10-07 16:30:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6415 to 3703. [2021-10-07 16:30:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3697 states have (on average 4.476061671625643) internal successors, (16548), 3702 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:30:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 16548 transitions. [2021-10-07 16:30:17,585 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 16548 transitions. Word has length 20 [2021-10-07 16:30:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:30:17,585 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 16548 transitions. [2021-10-07 16:30:17,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 16:30:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 16548 transitions. [2021-10-07 16:30:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:30:17,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:30:17,593 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1] [2021-10-07 16:30:17,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 16:30:17,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:30:17,809 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:30:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:30:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1949051590, now seen corresponding path program 5 times [2021-10-07 16:30:17,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:30:17,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331801099] [2021-10-07 16:30:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:30:17,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:30:17,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:30:17,813 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:30:17,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 16:30:18,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-07 16:30:18,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:30:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:30:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:30:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:30:18,647 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:30:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:30:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:30:19,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:30:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:30:23,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:30:23,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331801099] [2021-10-07 16:30:23,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331801099] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:30:23,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:30:23,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 16:30:23,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78254365] [2021-10-07 16:30:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 16:30:23,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:30:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 16:30:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:30:23,848 INFO L87 Difference]: Start difference. First operand 3703 states and 16548 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 16:31:34,226 WARN L207 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2021-10-07 16:31:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:31:42,308 INFO L93 Difference]: Finished difference Result 20185 states and 87770 transitions. [2021-10-07 16:31:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-07 16:31:42,313 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 16:31:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:31:42,416 INFO L225 Difference]: With dead ends: 20185 [2021-10-07 16:31:42,416 INFO L226 Difference]: Without dead ends: 20169 [2021-10-07 16:31:42,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 45589.7ms TimeCoverageRelationStatistics Valid=912, Invalid=3780, Unknown=0, NotChecked=0, Total=4692 [2021-10-07 16:31:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20169 states. [2021-10-07 16:31:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20169 to 5361. [2021-10-07 16:31:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5361 states, 5355 states have (on average 4.51577964519141) internal successors, (24182), 5360 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:31:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 24182 transitions. [2021-10-07 16:31:42,778 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 24182 transitions. Word has length 21 [2021-10-07 16:31:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:31:42,778 INFO L470 AbstractCegarLoop]: Abstraction has 5361 states and 24182 transitions. [2021-10-07 16:31:42,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 16:31:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 24182 transitions. [2021-10-07 16:31:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 16:31:42,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:31:42,789 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 16:31:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:43,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:31:43,005 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:31:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:31:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1397090728, now seen corresponding path program 1 times [2021-10-07 16:31:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:31:43,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209428956] [2021-10-07 16:31:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:31:43,007 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:31:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:31:43,009 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 16:31:43,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 16:31:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:31:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:31:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:31:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:31:43,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:31:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:31:44,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:31:44,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209428956] [2021-10-07 16:31:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209428956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:31:44,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:31:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-07 16:31:44,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464920679] [2021-10-07 16:31:44,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 16:31:44,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:31:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 16:31:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:31:44,132 INFO L87 Difference]: Start difference. First operand 5361 states and 24182 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 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 16:31:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:31:44,288 INFO L93 Difference]: Finished difference Result 5726 states and 25340 transitions. [2021-10-07 16:31:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 16:31:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 16:31:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:31:44,310 INFO L225 Difference]: With dead ends: 5726 [2021-10-07 16:31:44,310 INFO L226 Difference]: Without dead ends: 5622 [2021-10-07 16:31:44,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 16:31:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5622 states. [2021-10-07 16:31:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5622 to 5340. [2021-10-07 16:31:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5340 states, 5334 states have (on average 4.531683539557555) internal successors, (24172), 5339 states have internal predecessors, (24172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:31:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 24172 transitions. [2021-10-07 16:31:44,474 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 24172 transitions. Word has length 21 [2021-10-07 16:31:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:31:44,474 INFO L470 AbstractCegarLoop]: Abstraction has 5340 states and 24172 transitions. [2021-10-07 16:31:44,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 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 16:31:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 24172 transitions. [2021-10-07 16:31:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 16:31:44,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:31:44,484 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:31:44,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 16:31:44,685 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:31:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:31:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1620857735, now seen corresponding path program 4 times [2021-10-07 16:31:44,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:31:44,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824521333] [2021-10-07 16:31:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:31:44,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:31:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:31:44,689 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 16:31:44,690 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 16:31:45,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:31:45,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:31:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:31:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:31:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:31:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:31:45,436 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:31:45,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:31:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-07 16:31:46,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:31:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:31:49,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:31:49,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824521333] [2021-10-07 16:31:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824521333] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:31:49,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:31:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-10-07 16:31:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40561368] [2021-10-07 16:31:49,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:31:49,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:31:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:31:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:31:49,270 INFO L87 Difference]: Start difference. First operand 5340 states and 24172 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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 16:31:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:31:58,131 INFO L93 Difference]: Finished difference Result 6766 states and 28570 transitions. [2021-10-07 16:31:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 16:31:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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 16:31:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:31:58,164 INFO L225 Difference]: With dead ends: 6766 [2021-10-07 16:31:58,164 INFO L226 Difference]: Without dead ends: 6638 [2021-10-07 16:31:58,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 6692.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:31:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2021-10-07 16:31:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 5146. [2021-10-07 16:31:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5140 states have (on average 4.511673151750973) internal successors, (23190), 5145 states have internal predecessors, (23190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:31:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 23190 transitions. [2021-10-07 16:31:58,353 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 23190 transitions. Word has length 22 [2021-10-07 16:31:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:31:58,354 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 23190 transitions. [2021-10-07 16:31:58,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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 16:31:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 23190 transitions. [2021-10-07 16:31:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:31:58,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:31:58,362 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2021-10-07 16:31:58,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-07 16:31:58,563 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 16:31:58,563 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:31:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:31:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 45110630, now seen corresponding path program 6 times [2021-10-07 16:31:58,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:31:58,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329832622] [2021-10-07 16:31:58,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:31:58,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:31:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:31:58,567 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 16:31:58,568 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 16:31:59,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-07 16:31:59,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:31:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:31:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:31:59,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:31:59,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:31:59,651 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:31:59,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:32:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-07 16:32:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:32:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-07 16:32:03,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:32:03,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329832622] [2021-10-07 16:32:03,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329832622] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:32:03,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:32:03,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-10-07 16:32:03,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559680588] [2021-10-07 16:32:03,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 16:32:03,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:32:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 16:32:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-10-07 16:32:03,677 INFO L87 Difference]: Start difference. First operand 5146 states and 23190 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 16:32:18,732 WARN L207 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-10-07 16:32:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:32:32,764 INFO L93 Difference]: Finished difference Result 15050 states and 65927 transitions. [2021-10-07 16:32:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:32:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 23 [2021-10-07 16:32:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:32:32,830 INFO L225 Difference]: With dead ends: 15050 [2021-10-07 16:32:32,830 INFO L226 Difference]: Without dead ends: 15050 [2021-10-07 16:32:32,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 19321.6ms TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 16:32:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15050 states. [2021-10-07 16:32:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15050 to 6525. [2021-10-07 16:32:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6519 states have (on average 4.70210154931738) internal successors, (30653), 6524 states have internal predecessors, (30653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:32:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 30653 transitions. [2021-10-07 16:32:33,089 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 30653 transitions. Word has length 23 [2021-10-07 16:32:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:32:33,089 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 30653 transitions. [2021-10-07 16:32:33,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 16:32:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 30653 transitions. [2021-10-07 16:32:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:32:33,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:32:33,098 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 16:32:33,111 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 16:32:33,298 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 16:32:33,299 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:32:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:32:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash 561231300, now seen corresponding path program 5 times [2021-10-07 16:32:33,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:32:33,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610367574] [2021-10-07 16:32:33,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:32:33,302 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:32:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:32:33,303 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 16:32:33,306 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 16:32:33,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-07 16:32:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:32:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 16:32:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:32:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:32:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:32:34,210 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:32:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:32:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:32:35,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:32:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:32:39,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:32:39,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610367574] [2021-10-07 16:32:39,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610367574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:32:39,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:32:39,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 16:32:39,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024780612] [2021-10-07 16:32:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 16:32:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:32:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 16:32:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-10-07 16:32:39,044 INFO L87 Difference]: Start difference. First operand 6525 states and 30653 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 16:33:49,429 WARN L207 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2021-10-07 16:33:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:33:56,741 INFO L93 Difference]: Finished difference Result 26810 states and 122333 transitions. [2021-10-07 16:33:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-07 16:33:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 16:33:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:33:56,869 INFO L225 Difference]: With dead ends: 26810 [2021-10-07 16:33:56,869 INFO L226 Difference]: Without dead ends: 26650 [2021-10-07 16:33:56,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 44468.0ms TimeCoverageRelationStatistics Valid=877, Invalid=3545, Unknown=0, NotChecked=0, Total=4422 [2021-10-07 16:33:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26650 states. [2021-10-07 16:33:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26650 to 7048. [2021-10-07 16:33:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7048 states, 7043 states have (on average 4.716598040607695) internal successors, (33219), 7047 states have internal predecessors, (33219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:33:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 33219 transitions. [2021-10-07 16:33:57,420 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 33219 transitions. Word has length 23 [2021-10-07 16:33:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:33:57,420 INFO L470 AbstractCegarLoop]: Abstraction has 7048 states and 33219 transitions. [2021-10-07 16:33:57,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 16:33:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 33219 transitions. [2021-10-07 16:33:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:33:57,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:33:57,427 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] [2021-10-07 16:33:57,441 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 16:33:57,628 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 16:33:57,628 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:33:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:33:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -764329243, now seen corresponding path program 1 times [2021-10-07 16:33:57,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:33:57,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480312661] [2021-10-07 16:33:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:33:57,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:33:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:33:57,633 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 16:33:57,635 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 16:33:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:33:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 16:33:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:33:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:33:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:33:58,412 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:33:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:33:58,978 INFO L354 Elim1Store]: treesize reduction 497, result has 0.2 percent of original size [2021-10-07 16:33:58,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 265 treesize of output 123 [2021-10-07 16:33:59,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-07 16:33:59,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 76 [2021-10-07 16:33:59,020 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 75 treesize of output 73 [2021-10-07 16:33:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 16:33:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:33:59,824 INFO L354 Elim1Store]: treesize reduction 497, result has 0.2 percent of original size [2021-10-07 16:33:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 243 treesize of output 101 [2021-10-07 16:33:59,841 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 50 treesize of output 48 [2021-10-07 16:34:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:01,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:01,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480312661] [2021-10-07 16:34:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480312661] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 16:34:01,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 16:34:01,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-10-07 16:34:01,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032609543] [2021-10-07 16:34:01,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 16:34:01,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 16:34:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-07 16:34:01,243 INFO L87 Difference]: Start difference. First operand 7048 states and 33219 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:12,528 INFO L93 Difference]: Finished difference Result 12686 states and 59781 transitions. [2021-10-07 16:34:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 16:34:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 16:34:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:12,578 INFO L225 Difference]: With dead ends: 12686 [2021-10-07 16:34:12,579 INFO L226 Difference]: Without dead ends: 12686 [2021-10-07 16:34:12,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2282.9ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-07 16:34:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2021-10-07 16:34:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 7078. [2021-10-07 16:34:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7073 states have (on average 4.715962109430228) internal successors, (33356), 7077 states have internal predecessors, (33356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 33356 transitions. [2021-10-07 16:34:12,821 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 33356 transitions. Word has length 23 [2021-10-07 16:34:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:12,821 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 33356 transitions. [2021-10-07 16:34:12,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 33356 transitions. [2021-10-07 16:34:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 16:34:12,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:12,830 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] [2021-10-07 16:34:12,844 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 16:34:13,036 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 16:34:13,037 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -352533127, now seen corresponding path program 2 times [2021-10-07 16:34:13,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:13,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967521808] [2021-10-07 16:34:13,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:34:13,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:13,041 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 16:34:13,043 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 16:34:13,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:34:13,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 16:34:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:34:14,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 16:34:14,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:14,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967521808] [2021-10-07 16:34:14,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967521808] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:14,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:14,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-07 16:34:14,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541652478] [2021-10-07 16:34:14,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:34:14,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:34:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:34:14,416 INFO L87 Difference]: Start difference. First operand 7078 states and 33356 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 16:34:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:14,946 INFO L93 Difference]: Finished difference Result 7058 states and 33259 transitions. [2021-10-07 16:34:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 16:34:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 23 [2021-10-07 16:34:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:14,974 INFO L225 Difference]: With dead ends: 7058 [2021-10-07 16:34:14,974 INFO L226 Difference]: Without dead ends: 7058 [2021-10-07 16:34:14,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-07 16:34:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2021-10-07 16:34:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6972. [2021-10-07 16:34:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6967 states have (on average 4.729582316635567) internal successors, (32951), 6971 states have internal predecessors, (32951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 32951 transitions. [2021-10-07 16:34:15,144 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 32951 transitions. Word has length 23 [2021-10-07 16:34:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:15,144 INFO L470 AbstractCegarLoop]: Abstraction has 6972 states and 32951 transitions. [2021-10-07 16:34:15,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 16:34:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 32951 transitions. [2021-10-07 16:34:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:15,151 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:15,151 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 16:34:15,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-10-07 16:34:15,352 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 16:34:15,352 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 669320953, now seen corresponding path program 1 times [2021-10-07 16:34:15,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:15,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25877043] [2021-10-07 16:34:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 16:34:15,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:15,356 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 16:34:15,357 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 16:34:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:34:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:34:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:16,341 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:34:16,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:34:16,545 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 15 treesize of output 11 [2021-10-07 16:34:17,768 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 16:34:17,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:18,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:18,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25877043] [2021-10-07 16:34:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25877043] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:34:18,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938385829] [2021-10-07 16:34:18,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:34:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:34:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:34:18,660 INFO L87 Difference]: Start difference. First operand 6972 states and 32951 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:24,761 INFO L93 Difference]: Finished difference Result 8726 states and 40794 transitions. [2021-10-07 16:34:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:34:24,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:34:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:24,793 INFO L225 Difference]: With dead ends: 8726 [2021-10-07 16:34:24,793 INFO L226 Difference]: Without dead ends: 8726 [2021-10-07 16:34:24,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4547.2ms TimeCoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:34:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-10-07 16:34:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 7038. [2021-10-07 16:34:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7038 states, 7033 states have (on average 4.712498222664581) internal successors, (33143), 7037 states have internal predecessors, (33143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 33143 transitions. [2021-10-07 16:34:25,109 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 33143 transitions. Word has length 24 [2021-10-07 16:34:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:25,109 INFO L470 AbstractCegarLoop]: Abstraction has 7038 states and 33143 transitions. [2021-10-07 16:34:25,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 33143 transitions. [2021-10-07 16:34:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:25,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:25,116 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 16:34:25,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-10-07 16:34:25,317 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 16:34:25,317 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 882920577, now seen corresponding path program 2 times [2021-10-07 16:34:25,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:25,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83921988] [2021-10-07 16:34:25,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:34:25,320 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:25,323 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 16:34:25,325 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 16:34:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:34:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:34:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:26,422 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:34:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:34:26,631 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 15 treesize of output 11 [2021-10-07 16:34:27,568 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 16:34:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:28,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:28,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83921988] [2021-10-07 16:34:28,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83921988] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:28,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:28,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:34:28,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257654166] [2021-10-07 16:34:28,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:34:28,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:34:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:34:28,451 INFO L87 Difference]: Start difference. First operand 7038 states and 33143 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:34,308 INFO L93 Difference]: Finished difference Result 8876 states and 41309 transitions. [2021-10-07 16:34:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:34:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:34:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:34,342 INFO L225 Difference]: With dead ends: 8876 [2021-10-07 16:34:34,342 INFO L226 Difference]: Without dead ends: 8876 [2021-10-07 16:34:34,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4186.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:34:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-10-07 16:34:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 7052. [2021-10-07 16:34:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7047 states have (on average 4.709663686675181) internal successors, (33189), 7051 states have internal predecessors, (33189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 33189 transitions. [2021-10-07 16:34:34,548 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 33189 transitions. Word has length 24 [2021-10-07 16:34:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:34,549 INFO L470 AbstractCegarLoop]: Abstraction has 7052 states and 33189 transitions. [2021-10-07 16:34:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 33189 transitions. [2021-10-07 16:34:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:34,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:34,556 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 16:34:34,567 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 16:34:34,756 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 16:34:34,757 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash -190164803, now seen corresponding path program 3 times [2021-10-07 16:34:34,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:34,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017094574] [2021-10-07 16:34:34,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:34:34,759 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:34,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:34,760 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 16:34:34,761 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 16:34:35,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:34:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:35,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:34:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:35,908 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:34:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:34:36,167 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 15 treesize of output 11 [2021-10-07 16:34:37,292 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 16:34:37,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:38,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:38,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017094574] [2021-10-07 16:34:38,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017094574] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:38,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:38,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:34:38,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445034838] [2021-10-07 16:34:38,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:34:38,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:34:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:34:38,181 INFO L87 Difference]: Start difference. First operand 7052 states and 33189 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:43,931 INFO L93 Difference]: Finished difference Result 8796 states and 41046 transitions. [2021-10-07 16:34:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:34:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:34:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:43,964 INFO L225 Difference]: With dead ends: 8796 [2021-10-07 16:34:43,964 INFO L226 Difference]: Without dead ends: 8796 [2021-10-07 16:34:43,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4170.8ms TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 16:34:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8796 states. [2021-10-07 16:34:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8796 to 7058. [2021-10-07 16:34:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7058 states, 7053 states have (on average 4.7082092726499365) internal successors, (33207), 7057 states have internal predecessors, (33207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7058 states to 7058 states and 33207 transitions. [2021-10-07 16:34:44,163 INFO L78 Accepts]: Start accepts. Automaton has 7058 states and 33207 transitions. Word has length 24 [2021-10-07 16:34:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:44,163 INFO L470 AbstractCegarLoop]: Abstraction has 7058 states and 33207 transitions. [2021-10-07 16:34:44,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7058 states and 33207 transitions. [2021-10-07 16:34:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:44,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:44,170 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 16:34:44,182 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 16:34:44,371 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 16:34:44,371 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash -466190257, now seen corresponding path program 4 times [2021-10-07 16:34:44,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:44,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778580208] [2021-10-07 16:34:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:34:44,374 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:44,375 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 16:34:44,376 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 16:34:44,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:34:44,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:34:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:34:45,430 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:34:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:34:45,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:34:46,584 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 16:34:46,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:47,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:47,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778580208] [2021-10-07 16:34:47,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778580208] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:34:47,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:34:47,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:34:47,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887390351] [2021-10-07 16:34:47,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:34:47,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:34:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:34:47,549 INFO L87 Difference]: Start difference. First operand 7058 states and 33207 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:53,749 INFO L93 Difference]: Finished difference Result 9810 states and 45518 transitions. [2021-10-07 16:34:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:34:53,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:34:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:53,790 INFO L225 Difference]: With dead ends: 9810 [2021-10-07 16:34:53,790 INFO L226 Difference]: Without dead ends: 9810 [2021-10-07 16:34:53,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4403.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 16:34:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-10-07 16:34:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7074. [2021-10-07 16:34:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7069 states have (on average 4.707172160135804) internal successors, (33275), 7073 states have internal predecessors, (33275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 33275 transitions. [2021-10-07 16:34:53,985 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 33275 transitions. Word has length 24 [2021-10-07 16:34:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 7074 states and 33275 transitions. [2021-10-07 16:34:53,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 33275 transitions. [2021-10-07 16:34:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:53,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:53,993 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 16:34:54,004 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 16:34:54,193 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 16:34:54,193 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1539275637, now seen corresponding path program 5 times [2021-10-07 16:34:54,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:54,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068705593] [2021-10-07 16:34:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:34:54,196 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:54,198 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 16:34:54,199 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 16:34:54,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:34:54,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:34:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:34:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:34:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:55,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:34:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:34:55,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:34:55,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068705593] [2021-10-07 16:34:55,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068705593] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:34:55,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:34:55,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-07 16:34:55,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909088183] [2021-10-07 16:34:55,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:34:55,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:34:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:34:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:34:55,479 INFO L87 Difference]: Start difference. First operand 7074 states and 33275 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 16:34:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:34:58,994 INFO L93 Difference]: Finished difference Result 9942 states and 45594 transitions. [2021-10-07 16:34:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:34:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 24 [2021-10-07 16:34:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:34:59,032 INFO L225 Difference]: With dead ends: 9942 [2021-10-07 16:34:59,032 INFO L226 Difference]: Without dead ends: 9942 [2021-10-07 16:34:59,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1415.2ms TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:34:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2021-10-07 16:34:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 7714. [2021-10-07 16:34:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7714 states, 7709 states have (on average 4.717862238941497) internal successors, (36370), 7713 states have internal predecessors, (36370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:34:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7714 states to 7714 states and 36370 transitions. [2021-10-07 16:34:59,251 INFO L78 Accepts]: Start accepts. Automaton has 7714 states and 36370 transitions. Word has length 24 [2021-10-07 16:34:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:34:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 7714 states and 36370 transitions. [2021-10-07 16:34:59,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 16:34:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7714 states and 36370 transitions. [2021-10-07 16:34:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:34:59,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:34:59,261 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 16:34:59,273 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 16:34:59,461 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 16:34:59,462 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:34:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:34:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1749536185, now seen corresponding path program 6 times [2021-10-07 16:34:59,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:34:59,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222327884] [2021-10-07 16:34:59,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:34:59,464 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:34:59,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:34:59,466 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 16:34:59,467 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 16:35:00,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:35:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:00,613 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:00,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:00,808 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 15 treesize of output 11 [2021-10-07 16:35:01,781 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 16:35:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:02,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:02,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222327884] [2021-10-07 16:35:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222327884] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:02,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378844639] [2021-10-07 16:35:02,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:02,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:02,765 INFO L87 Difference]: Start difference. First operand 7714 states and 36370 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:08,387 INFO L93 Difference]: Finished difference Result 9266 states and 43280 transitions. [2021-10-07 16:35:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:35:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:35:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:08,421 INFO L225 Difference]: With dead ends: 9266 [2021-10-07 16:35:08,421 INFO L226 Difference]: Without dead ends: 9266 [2021-10-07 16:35:08,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3606.2ms TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:35:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-10-07 16:35:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 7726. [2021-10-07 16:35:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7721 states have (on average 4.713379095972025) internal successors, (36392), 7725 states have internal predecessors, (36392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 36392 transitions. [2021-10-07 16:35:08,611 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 36392 transitions. Word has length 24 [2021-10-07 16:35:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:08,611 INFO L470 AbstractCegarLoop]: Abstraction has 7726 states and 36392 transitions. [2021-10-07 16:35:08,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 36392 transitions. [2021-10-07 16:35:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:08,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:08,620 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 16:35:08,637 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 16:35:08,833 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 16:35:08,834 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1661824875, now seen corresponding path program 7 times [2021-10-07 16:35:08,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:08,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570860513] [2021-10-07 16:35:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:35:08,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:08,837 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 16:35:08,838 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 16:35:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:35:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:09,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:10,042 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:10,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:10,238 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 15 treesize of output 11 [2021-10-07 16:35:11,286 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 16:35:11,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:12,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570860513] [2021-10-07 16:35:12,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570860513] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:12,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:12,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:12,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084968790] [2021-10-07 16:35:12,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:12,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:12,167 INFO L87 Difference]: Start difference. First operand 7726 states and 36392 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:18,907 INFO L93 Difference]: Finished difference Result 9874 states and 45707 transitions. [2021-10-07 16:35:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:35:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:35:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:18,943 INFO L225 Difference]: With dead ends: 9874 [2021-10-07 16:35:18,943 INFO L226 Difference]: Without dead ends: 9874 [2021-10-07 16:35:18,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4505.4ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:35:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-10-07 16:35:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 7736. [2021-10-07 16:35:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 7731 states have (on average 4.7127150433320395) internal successors, (36434), 7735 states have internal predecessors, (36434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 36434 transitions. [2021-10-07 16:35:19,149 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 36434 transitions. Word has length 24 [2021-10-07 16:35:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 36434 transitions. [2021-10-07 16:35:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 36434 transitions. [2021-10-07 16:35:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:19,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:19,157 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 16:35:19,169 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 16:35:19,358 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 16:35:19,358 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1448225251, now seen corresponding path program 8 times [2021-10-07 16:35:19,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:19,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832576317] [2021-10-07 16:35:19,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:35:19,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:19,362 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 16:35:19,363 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 16:35:20,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:35:20,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:20,789 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:21,056 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 15 treesize of output 11 [2021-10-07 16:35:22,028 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 16:35:22,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:22,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:22,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832576317] [2021-10-07 16:35:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832576317] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:22,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:22,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:22,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459523904] [2021-10-07 16:35:22,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:22,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:22,979 INFO L87 Difference]: Start difference. First operand 7736 states and 36434 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:28,710 INFO L93 Difference]: Finished difference Result 9884 states and 45732 transitions. [2021-10-07 16:35:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:35:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:35:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:28,748 INFO L225 Difference]: With dead ends: 9884 [2021-10-07 16:35:28,749 INFO L226 Difference]: Without dead ends: 9884 [2021-10-07 16:35:28,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3869.1ms TimeCoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:35:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2021-10-07 16:35:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 7742. [2021-10-07 16:35:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7742 states, 7737 states have (on average 4.7129378312007235) internal successors, (36464), 7741 states have internal predecessors, (36464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7742 states to 7742 states and 36464 transitions. [2021-10-07 16:35:28,967 INFO L78 Accepts]: Start accepts. Automaton has 7742 states and 36464 transitions. Word has length 24 [2021-10-07 16:35:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:28,968 INFO L470 AbstractCegarLoop]: Abstraction has 7742 states and 36464 transitions. [2021-10-07 16:35:28,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7742 states and 36464 transitions. [2021-10-07 16:35:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:28,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:28,977 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 16:35:28,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:29,177 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 16:35:29,178 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1773656665, now seen corresponding path program 9 times [2021-10-07 16:35:29,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:29,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851076388] [2021-10-07 16:35:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:35:29,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:29,182 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 16:35:29,187 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 16:35:29,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:35:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:29,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:30,388 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:30,581 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 15 treesize of output 11 [2021-10-07 16:35:31,566 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 16:35:31,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:32,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851076388] [2021-10-07 16:35:32,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851076388] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:32,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:32,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813414783] [2021-10-07 16:35:32,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:32,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:32,477 INFO L87 Difference]: Start difference. First operand 7742 states and 36464 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:38,009 INFO L93 Difference]: Finished difference Result 9826 states and 45509 transitions. [2021-10-07 16:35:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:35:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:35:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:38,045 INFO L225 Difference]: With dead ends: 9826 [2021-10-07 16:35:38,046 INFO L226 Difference]: Without dead ends: 9826 [2021-10-07 16:35:38,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4079.0ms TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:35:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-10-07 16:35:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 7730. [2021-10-07 16:35:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7725 states have (on average 4.713268608414239) internal successors, (36410), 7729 states have internal predecessors, (36410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 36410 transitions. [2021-10-07 16:35:38,256 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 36410 transitions. Word has length 24 [2021-10-07 16:35:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:38,256 INFO L470 AbstractCegarLoop]: Abstraction has 7730 states and 36410 transitions. [2021-10-07 16:35:38,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 36410 transitions. [2021-10-07 16:35:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:38,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:38,264 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 16:35:38,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:38,477 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 16:35:38,478 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash 666281515, now seen corresponding path program 10 times [2021-10-07 16:35:38,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:38,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63804483] [2021-10-07 16:35:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:35:38,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:38,481 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 16:35:38,484 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 16:35:39,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:35:39,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:39,588 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:39,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:39,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:35:40,861 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 16:35:40,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:41,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63804483] [2021-10-07 16:35:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63804483] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:41,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:41,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:41,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882385433] [2021-10-07 16:35:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:41,847 INFO L87 Difference]: Start difference. First operand 7730 states and 36410 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:47,448 INFO L93 Difference]: Finished difference Result 9558 states and 44333 transitions. [2021-10-07 16:35:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:35:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:35:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:47,485 INFO L225 Difference]: With dead ends: 9558 [2021-10-07 16:35:47,485 INFO L226 Difference]: Without dead ends: 9558 [2021-10-07 16:35:47,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3792.5ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:35:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9558 states. [2021-10-07 16:35:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9558 to 7734. [2021-10-07 16:35:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7734 states, 7729 states have (on average 4.712123172467331) internal successors, (36420), 7733 states have internal predecessors, (36420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7734 states to 7734 states and 36420 transitions. [2021-10-07 16:35:47,717 INFO L78 Accepts]: Start accepts. Automaton has 7734 states and 36420 transitions. Word has length 24 [2021-10-07 16:35:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:47,717 INFO L470 AbstractCegarLoop]: Abstraction has 7734 states and 36420 transitions. [2021-10-07 16:35:47,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:35:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7734 states and 36420 transitions. [2021-10-07 16:35:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:47,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:47,726 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 16:35:47,738 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 16:35:47,926 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 16:35:47,927 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash -256651367, now seen corresponding path program 11 times [2021-10-07 16:35:47,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:47,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776889823] [2021-10-07 16:35:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:35:47,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:47,931 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 16:35:47,932 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 16:35:48,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:35:48,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:35:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:49,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:49,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:49,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776889823] [2021-10-07 16:35:49,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776889823] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:35:49,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:35:49,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-07 16:35:49,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882381254] [2021-10-07 16:35:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:35:49,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:35:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:35:49,349 INFO L87 Difference]: Start difference. First operand 7734 states and 36420 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:35:53,089 INFO L93 Difference]: Finished difference Result 11672 states and 55315 transitions. [2021-10-07 16:35:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:35:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 16:35:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:35:53,134 INFO L225 Difference]: With dead ends: 11672 [2021-10-07 16:35:53,134 INFO L226 Difference]: Without dead ends: 11672 [2021-10-07 16:35:53,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2090.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-10-07 16:35:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11672 states. [2021-10-07 16:35:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11672 to 8050. [2021-10-07 16:35:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8045 states have (on average 4.692355500310752) internal successors, (37750), 8049 states have internal predecessors, (37750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37750 transitions. [2021-10-07 16:35:53,378 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37750 transitions. Word has length 24 [2021-10-07 16:35:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:35:53,378 INFO L470 AbstractCegarLoop]: Abstraction has 8050 states and 37750 transitions. [2021-10-07 16:35:53,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:35:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37750 transitions. [2021-10-07 16:35:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:35:53,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:35:53,388 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 16:35:53,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-07 16:35:53,588 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 16:35:53,589 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:35:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:35:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 5626479, now seen corresponding path program 12 times [2021-10-07 16:35:53,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:35:53,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67953437] [2021-10-07 16:35:53,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:35:53,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:35:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:35:53,592 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 16:35:53,593 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 16:35:54,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:35:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:35:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:35:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:35:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:35:54,864 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:35:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:35:55,087 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 15 treesize of output 11 [2021-10-07 16:35:56,238 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 16:35:56,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:35:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:35:57,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:35:57,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67953437] [2021-10-07 16:35:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67953437] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:35:57,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:35:57,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:35:57,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636216103] [2021-10-07 16:35:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:35:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:35:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:35:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:35:57,204 INFO L87 Difference]: Start difference. First operand 8050 states and 37750 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:03,627 INFO L93 Difference]: Finished difference Result 12142 states and 54952 transitions. [2021-10-07 16:36:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:36:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:36:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:03,673 INFO L225 Difference]: With dead ends: 12142 [2021-10-07 16:36:03,674 INFO L226 Difference]: Without dead ends: 12142 [2021-10-07 16:36:03,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4558.6ms TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:36:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-10-07 16:36:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 8060. [2021-10-07 16:36:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8060 states, 8055 states have (on average 4.6929857231533205) internal successors, (37802), 8059 states have internal predecessors, (37802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 37802 transitions. [2021-10-07 16:36:04,054 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 37802 transitions. Word has length 24 [2021-10-07 16:36:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:04,054 INFO L470 AbstractCegarLoop]: Abstraction has 8060 states and 37802 transitions. [2021-10-07 16:36:04,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 37802 transitions. [2021-10-07 16:36:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:04,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:04,063 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 16:36:04,075 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 16:36:04,264 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 16:36:04,265 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1067458901, now seen corresponding path program 13 times [2021-10-07 16:36:04,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:04,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751733104] [2021-10-07 16:36:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:36:04,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:04,269 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 16:36:04,270 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 16:36:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:36:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:36:05,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:05,520 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:36:05,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:36:05,711 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 15 treesize of output 11 [2021-10-07 16:36:06,710 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 16:36:06,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:07,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:07,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751733104] [2021-10-07 16:36:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751733104] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:07,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:07,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:36:07,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886598654] [2021-10-07 16:36:07,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:36:07,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:36:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:36:07,646 INFO L87 Difference]: Start difference. First operand 8060 states and 37802 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:15,719 INFO L93 Difference]: Finished difference Result 13376 states and 60341 transitions. [2021-10-07 16:36:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 16:36:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:36:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:15,773 INFO L225 Difference]: With dead ends: 13376 [2021-10-07 16:36:15,774 INFO L226 Difference]: Without dead ends: 13376 [2021-10-07 16:36:15,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 5744.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 16:36:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2021-10-07 16:36:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 8054. [2021-10-07 16:36:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 8049 states have (on average 4.692756864206734) internal successors, (37772), 8053 states have internal predecessors, (37772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 37772 transitions. [2021-10-07 16:36:16,029 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 37772 transitions. Word has length 24 [2021-10-07 16:36:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:16,030 INFO L470 AbstractCegarLoop]: Abstraction has 8054 states and 37772 transitions. [2021-10-07 16:36:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 37772 transitions. [2021-10-07 16:36:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:16,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:16,040 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 16:36:16,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:16,247 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 16:36:16,248 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1151912235, now seen corresponding path program 14 times [2021-10-07 16:36:16,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:16,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819641029] [2021-10-07 16:36:16,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:36:16,251 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:16,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:16,252 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 16:36:16,255 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 16:36:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:36:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:36:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:17,611 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:36:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:36:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:36:18,772 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 16:36:18,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:19,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:19,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819641029] [2021-10-07 16:36:19,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819641029] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:19,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:19,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:36:19,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089384790] [2021-10-07 16:36:19,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:36:19,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:36:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:36:19,783 INFO L87 Difference]: Start difference. First operand 8054 states and 37772 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:26,456 INFO L93 Difference]: Finished difference Result 11026 states and 49303 transitions. [2021-10-07 16:36:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 16:36:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:36:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:26,499 INFO L225 Difference]: With dead ends: 11026 [2021-10-07 16:36:26,500 INFO L226 Difference]: Without dead ends: 11026 [2021-10-07 16:36:26,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4287.6ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 16:36:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11026 states. [2021-10-07 16:36:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11026 to 8058. [2021-10-07 16:36:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8058 states, 8053 states have (on average 4.69166770147771) internal successors, (37782), 8057 states have internal predecessors, (37782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 37782 transitions. [2021-10-07 16:36:26,844 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 37782 transitions. Word has length 24 [2021-10-07 16:36:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:26,844 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 37782 transitions. [2021-10-07 16:36:26,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 37782 transitions. [2021-10-07 16:36:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:26,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:26,853 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 16:36:26,866 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 16:36:27,059 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 16:36:27,060 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906027, now seen corresponding path program 15 times [2021-10-07 16:36:27,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:27,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76747296] [2021-10-07 16:36:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:36:27,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:27,064 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 16:36:27,065 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 16:36:27,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:36:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:36:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:28,331 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:36:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:36:28,520 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 15 treesize of output 11 [2021-10-07 16:36:29,505 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 16:36:29,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:30,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:30,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76747296] [2021-10-07 16:36:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76747296] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:30,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:30,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:36:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82219051] [2021-10-07 16:36:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:36:30,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:36:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:36:30,416 INFO L87 Difference]: Start difference. First operand 8058 states and 37782 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:37,287 INFO L93 Difference]: Finished difference Result 12002 states and 54445 transitions. [2021-10-07 16:36:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:36:37,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:36:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:37,337 INFO L225 Difference]: With dead ends: 12002 [2021-10-07 16:36:37,337 INFO L226 Difference]: Without dead ends: 12002 [2021-10-07 16:36:37,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 4605.2ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 16:36:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-10-07 16:36:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 8064. [2021-10-07 16:36:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8064 states, 8059 states have (on average 4.690532324109691) internal successors, (37801), 8063 states have internal predecessors, (37801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8064 states to 8064 states and 37801 transitions. [2021-10-07 16:36:37,596 INFO L78 Accepts]: Start accepts. Automaton has 8064 states and 37801 transitions. Word has length 24 [2021-10-07 16:36:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:37,596 INFO L470 AbstractCegarLoop]: Abstraction has 8064 states and 37801 transitions. [2021-10-07 16:36:37,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8064 states and 37801 transitions. [2021-10-07 16:36:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:37,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:37,605 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 16:36:37,619 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 16:36:37,805 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 16:36:37,806 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1132863585, now seen corresponding path program 16 times [2021-10-07 16:36:37,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:37,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911915597] [2021-10-07 16:36:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:36:37,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:37,810 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 16:36:37,811 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 16:36:38,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:36:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:38,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:36:38,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:38,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:39,130 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:36:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:36:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:36:40,299 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 16:36:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:41,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:41,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911915597] [2021-10-07 16:36:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911915597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:41,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:41,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:36:41,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174045786] [2021-10-07 16:36:41,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:36:41,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:36:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:36:41,313 INFO L87 Difference]: Start difference. First operand 8064 states and 37801 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:48,744 INFO L93 Difference]: Finished difference Result 14706 states and 65567 transitions. [2021-10-07 16:36:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 16:36:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:36:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:48,799 INFO L225 Difference]: With dead ends: 14706 [2021-10-07 16:36:48,799 INFO L226 Difference]: Without dead ends: 14706 [2021-10-07 16:36:48,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5055.9ms TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:36:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14706 states. [2021-10-07 16:36:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14706 to 8082. [2021-10-07 16:36:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8082 states, 8077 states have (on average 4.690726754983286) internal successors, (37887), 8081 states have internal predecessors, (37887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8082 states to 8082 states and 37887 transitions. [2021-10-07 16:36:49,183 INFO L78 Accepts]: Start accepts. Automaton has 8082 states and 37887 transitions. Word has length 24 [2021-10-07 16:36:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:49,183 INFO L470 AbstractCegarLoop]: Abstraction has 8082 states and 37887 transitions. [2021-10-07 16:36:49,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:36:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8082 states and 37887 transitions. [2021-10-07 16:36:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:49,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:49,191 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 16:36:49,203 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 16:36:49,391 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 16:36:49,392 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:49,394 INFO L82 PathProgramCache]: Analyzing trace with hash -24675129, now seen corresponding path program 17 times [2021-10-07 16:36:49,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:49,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196814788] [2021-10-07 16:36:49,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:36:49,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:49,396 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 16:36:49,397 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 16:36:50,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:36:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:50,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 16:36:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:50,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:50,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:50,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196814788] [2021-10-07 16:36:50,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196814788] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 16:36:50,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 16:36:50,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-07 16:36:50,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849502642] [2021-10-07 16:36:50,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 16:36:50,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 16:36:50,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-07 16:36:50,980 INFO L87 Difference]: Start difference. First operand 8082 states and 37887 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:36:54,307 INFO L93 Difference]: Finished difference Result 13100 states and 58329 transitions. [2021-10-07 16:36:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 16:36:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 16:36:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:36:54,357 INFO L225 Difference]: With dead ends: 13100 [2021-10-07 16:36:54,357 INFO L226 Difference]: Without dead ends: 13100 [2021-10-07 16:36:54,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1503.1ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-10-07 16:36:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-10-07 16:36:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8150. [2021-10-07 16:36:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.678453038674033) internal successors, (38106), 8149 states have internal predecessors, (38106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38106 transitions. [2021-10-07 16:36:54,612 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38106 transitions. Word has length 24 [2021-10-07 16:36:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:36:54,612 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38106 transitions. [2021-10-07 16:36:54,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:36:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38106 transitions. [2021-10-07 16:36:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:36:54,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:36:54,620 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 16:36:54,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-07 16:36:54,821 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 16:36:54,821 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:36:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:36:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash 545627463, now seen corresponding path program 18 times [2021-10-07 16:36:54,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:36:54,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240487196] [2021-10-07 16:36:54,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:36:54,824 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:36:54,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:36:54,825 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 16:36:54,826 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 16:36:55,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:36:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:36:55,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:36:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:36:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:36:56,192 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:36:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:36:56,396 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 15 treesize of output 11 [2021-10-07 16:36:57,313 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 16:36:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:36:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:36:58,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:36:58,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240487196] [2021-10-07 16:36:58,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240487196] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:36:58,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:36:58,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:36:58,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008322721] [2021-10-07 16:36:58,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:36:58,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:36:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:36:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:36:58,221 INFO L87 Difference]: Start difference. First operand 8150 states and 38106 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:37:04,660 INFO L93 Difference]: Finished difference Result 12048 states and 54501 transitions. [2021-10-07 16:37:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 16:37:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:37:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:37:04,708 INFO L225 Difference]: With dead ends: 12048 [2021-10-07 16:37:04,708 INFO L226 Difference]: Without dead ends: 12048 [2021-10-07 16:37:04,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4048.5ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 16:37:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12048 states. [2021-10-07 16:37:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12048 to 8150. [2021-10-07 16:37:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.678453038674033) internal successors, (38106), 8149 states have internal predecessors, (38106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:37:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38106 transitions. [2021-10-07 16:37:04,970 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38106 transitions. Word has length 24 [2021-10-07 16:37:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:37:04,970 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38106 transitions. [2021-10-07 16:37:04,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38106 transitions. [2021-10-07 16:37:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:37:04,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:37:04,978 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 16:37:04,990 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 16:37:05,178 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 16:37:05,179 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:37:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:37:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash -56632163, now seen corresponding path program 19 times [2021-10-07 16:37:05,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:37:05,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875501371] [2021-10-07 16:37:05,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:37:05,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:37:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:37:05,183 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 16:37:05,186 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 16:37:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:37:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:37:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:06,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:06,494 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:37:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:37:06,765 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 15 treesize of output 11 [2021-10-07 16:37:07,696 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 16:37:07,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:37:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:37:08,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:08,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875501371] [2021-10-07 16:37:08,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875501371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:37:08,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:37:08,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:37:08,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972239743] [2021-10-07 16:37:08,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:37:08,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:37:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:37:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:37:08,659 INFO L87 Difference]: Start difference. First operand 8150 states and 38106 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:37:14,286 INFO L93 Difference]: Finished difference Result 10800 states and 48387 transitions. [2021-10-07 16:37:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 16:37:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:37:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:37:14,324 INFO L225 Difference]: With dead ends: 10800 [2021-10-07 16:37:14,324 INFO L226 Difference]: Without dead ends: 10800 [2021-10-07 16:37:14,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3554.4ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 16:37:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10800 states. [2021-10-07 16:37:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10800 to 8158. [2021-10-07 16:37:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8153 states have (on average 4.6760701582239665) internal successors, (38124), 8157 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:37:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 38124 transitions. [2021-10-07 16:37:14,543 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 38124 transitions. Word has length 24 [2021-10-07 16:37:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:37:14,543 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 38124 transitions. [2021-10-07 16:37:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 38124 transitions. [2021-10-07 16:37:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:37:14,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:37:14,551 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 16:37:14,563 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 16:37:14,751 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 16:37:14,751 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:37:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:37:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash -978334303, now seen corresponding path program 20 times [2021-10-07 16:37:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:37:14,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481727896] [2021-10-07 16:37:14,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:37:14,754 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:37:14,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:37:14,755 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 16:37:14,756 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 16:37:15,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:37:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:37:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:37:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:15,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:16,162 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:37:16,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:37:16,364 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 15 treesize of output 11 [2021-10-07 16:37:17,284 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 16:37:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:37:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:37:18,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:18,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481727896] [2021-10-07 16:37:18,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481727896] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:37:18,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:37:18,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:37:18,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67515185] [2021-10-07 16:37:18,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:37:18,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:37:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:37:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:37:18,236 INFO L87 Difference]: Start difference. First operand 8158 states and 38124 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:37:23,359 INFO L93 Difference]: Finished difference Result 10804 states and 48424 transitions. [2021-10-07 16:37:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 16:37:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:37:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:37:23,398 INFO L225 Difference]: With dead ends: 10804 [2021-10-07 16:37:23,399 INFO L226 Difference]: Without dead ends: 10804 [2021-10-07 16:37:23,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 3221.9ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 16:37:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-10-07 16:37:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8158. [2021-10-07 16:37:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8153 states have (on average 4.6760701582239665) internal successors, (38124), 8157 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:37:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 38124 transitions. [2021-10-07 16:37:23,634 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 38124 transitions. Word has length 24 [2021-10-07 16:37:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:37:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 38124 transitions. [2021-10-07 16:37:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 38124 transitions. [2021-10-07 16:37:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:37:23,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:37:23,642 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 16:37:23,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-07 16:37:23,843 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 16:37:23,843 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:37:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:37:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2030600507, now seen corresponding path program 21 times [2021-10-07 16:37:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:37:23,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350138781] [2021-10-07 16:37:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:37:23,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:37:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:37:23,846 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 16:37:23,847 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 16:37:24,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:37:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:37:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:37:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:25,360 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:37:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:37:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:37:26,642 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 16:37:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:37:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:37:27,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:27,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350138781] [2021-10-07 16:37:27,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350138781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:37:27,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:37:27,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:37:27,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909598666] [2021-10-07 16:37:27,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:37:27,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:37:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:37:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:37:27,630 INFO L87 Difference]: Start difference. First operand 8158 states and 38124 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:37:36,681 INFO L93 Difference]: Finished difference Result 13020 states and 57874 transitions. [2021-10-07 16:37:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:37:36,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:37:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:37:36,730 INFO L225 Difference]: With dead ends: 13020 [2021-10-07 16:37:36,730 INFO L226 Difference]: Without dead ends: 13020 [2021-10-07 16:37:36,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 6374.4ms TimeCoverageRelationStatistics Valid=515, Invalid=1555, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 16:37:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2021-10-07 16:37:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 8154. [2021-10-07 16:37:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8149 states have (on average 4.676647441403853) internal successors, (38110), 8153 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:37:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 38110 transitions. [2021-10-07 16:37:37,001 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 38110 transitions. Word has length 24 [2021-10-07 16:37:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:37:37,001 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 38110 transitions. [2021-10-07 16:37:37,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 38110 transitions. [2021-10-07 16:37:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:37:37,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:37:37,009 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 16:37:37,022 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 16:37:37,210 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 16:37:37,210 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:37:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:37:37,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1699167639, now seen corresponding path program 22 times [2021-10-07 16:37:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:37:37,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973775405] [2021-10-07 16:37:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:37:37,212 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:37:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:37:37,214 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 16:37:37,215 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 16:37:38,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:37:38,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:37:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:37:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:37:38,615 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:37:38,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:37:38,826 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 15 treesize of output 11 [2021-10-07 16:37:39,843 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 16:37:39,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:37:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:37:41,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:41,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973775405] [2021-10-07 16:37:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973775405] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:37:41,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:37:41,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:37:41,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147527160] [2021-10-07 16:37:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:37:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:37:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:37:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:37:41,126 INFO L87 Difference]: Start difference. First operand 8154 states and 38110 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:37:50,343 INFO L93 Difference]: Finished difference Result 13992 states and 60848 transitions. [2021-10-07 16:37:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 16:37:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:37:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:37:50,400 INFO L225 Difference]: With dead ends: 13992 [2021-10-07 16:37:50,400 INFO L226 Difference]: Without dead ends: 13992 [2021-10-07 16:37:50,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 6031.8ms TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 16:37:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-10-07 16:37:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 8154. [2021-10-07 16:37:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8149 states have (on average 4.676647441403853) internal successors, (38110), 8153 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:37:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 38110 transitions. [2021-10-07 16:37:50,678 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 38110 transitions. Word has length 24 [2021-10-07 16:37:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:37:50,678 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 38110 transitions. [2021-10-07 16:37:50,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:37:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 38110 transitions. [2021-10-07 16:37:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:37:50,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:37:50,686 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 16:37:50,699 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 16:37:50,887 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 16:37:50,887 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:37:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:37:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash 918236107, now seen corresponding path program 23 times [2021-10-07 16:37:50,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:37:50,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361001269] [2021-10-07 16:37:50,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:37:50,890 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:37:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:37:50,891 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 16:37:50,894 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 16:37:51,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:37:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:37:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 16:37:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:37:53,079 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 16:37:53,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:37:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:37:54,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:37:54,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361001269] [2021-10-07 16:37:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361001269] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:37:54,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:37:54,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:37:54,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960178776] [2021-10-07 16:37:54,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:37:54,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:37:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:37:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:37:54,154 INFO L87 Difference]: Start difference. First operand 8154 states and 38110 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:38:02,883 INFO L93 Difference]: Finished difference Result 15284 states and 66921 transitions. [2021-10-07 16:38:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 16:38:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:38:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:38:02,942 INFO L225 Difference]: With dead ends: 15284 [2021-10-07 16:38:02,942 INFO L226 Difference]: Without dead ends: 15284 [2021-10-07 16:38:02,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 6657.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:38:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15284 states. [2021-10-07 16:38:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15284 to 8148. [2021-10-07 16:38:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8148 states, 8143 states have (on average 4.676409185803758) internal successors, (38080), 8147 states have internal predecessors, (38080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:38:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 38080 transitions. [2021-10-07 16:38:03,233 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 38080 transitions. Word has length 24 [2021-10-07 16:38:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:38:03,233 INFO L470 AbstractCegarLoop]: Abstraction has 8148 states and 38080 transitions. [2021-10-07 16:38:03,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 38080 transitions. [2021-10-07 16:38:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:38:03,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:38:03,241 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 16:38:03,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-07 16:38:03,441 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 16:38:03,442 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:38:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:38:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash 854788981, now seen corresponding path program 24 times [2021-10-07 16:38:03,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:38:03,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233124906] [2021-10-07 16:38:03,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:38:03,444 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:38:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:38:03,445 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 16:38:03,446 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 16:38:04,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:38:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:38:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:38:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:38:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:04,973 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:38:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:38:05,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:38:06,263 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 16:38:06,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:38:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:38:07,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:38:07,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233124906] [2021-10-07 16:38:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233124906] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:38:07,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:38:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:38:07,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291773841] [2021-10-07 16:38:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:38:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:38:07,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:38:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:38:07,326 INFO L87 Difference]: Start difference. First operand 8148 states and 38080 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:38:15,387 INFO L93 Difference]: Finished difference Result 12874 states and 57285 transitions. [2021-10-07 16:38:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 16:38:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:38:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:38:15,437 INFO L225 Difference]: With dead ends: 12874 [2021-10-07 16:38:15,437 INFO L226 Difference]: Without dead ends: 12874 [2021-10-07 16:38:15,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 5214.7ms TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:38:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12874 states. [2021-10-07 16:38:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12874 to 8150. [2021-10-07 16:38:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8150 states, 8145 states have (on average 4.674401473296501) internal successors, (38073), 8149 states have internal predecessors, (38073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:38:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8150 states to 8150 states and 38073 transitions. [2021-10-07 16:38:15,693 INFO L78 Accepts]: Start accepts. Automaton has 8150 states and 38073 transitions. Word has length 24 [2021-10-07 16:38:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:38:15,694 INFO L470 AbstractCegarLoop]: Abstraction has 8150 states and 38073 transitions. [2021-10-07 16:38:15,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8150 states and 38073 transitions. [2021-10-07 16:38:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:38:15,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:38:15,701 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 16:38:15,714 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 16:38:15,901 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 16:38:15,902 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:38:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:38:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1435531095, now seen corresponding path program 25 times [2021-10-07 16:38:15,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:38:15,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26925119] [2021-10-07 16:38:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:38:15,906 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:38:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:38:15,907 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 16:38:15,908 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 16:38:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:38:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:38:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:38:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:17,379 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:38:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:38:17,611 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 15 treesize of output 11 [2021-10-07 16:38:18,648 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 16:38:18,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:38:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:38:19,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:38:19,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26925119] [2021-10-07 16:38:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26925119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:38:19,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:38:19,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:38:19,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408641161] [2021-10-07 16:38:19,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:38:19,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:38:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:38:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:38:19,804 INFO L87 Difference]: Start difference. First operand 8150 states and 38073 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:38:27,524 INFO L93 Difference]: Finished difference Result 14194 states and 64178 transitions. [2021-10-07 16:38:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 16:38:27,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:38:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:38:27,585 INFO L225 Difference]: With dead ends: 14194 [2021-10-07 16:38:27,585 INFO L226 Difference]: Without dead ends: 14194 [2021-10-07 16:38:27,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 5488.3ms TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:38:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14194 states. [2021-10-07 16:38:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14194 to 8156. [2021-10-07 16:38:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8156 states, 8151 states have (on average 4.6746411483253585) internal successors, (38103), 8155 states have internal predecessors, (38103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:38:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8156 states to 8156 states and 38103 transitions. [2021-10-07 16:38:28,002 INFO L78 Accepts]: Start accepts. Automaton has 8156 states and 38103 transitions. Word has length 24 [2021-10-07 16:38:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:38:28,003 INFO L470 AbstractCegarLoop]: Abstraction has 8156 states and 38103 transitions. [2021-10-07 16:38:28,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8156 states and 38103 transitions. [2021-10-07 16:38:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:38:28,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:38:28,011 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 16:38:28,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-10-07 16:38:28,211 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 16:38:28,212 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:38:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:38:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash 362445715, now seen corresponding path program 26 times [2021-10-07 16:38:28,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:38:28,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556396775] [2021-10-07 16:38:28,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 16:38:28,216 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:38:28,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:38:28,217 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 16:38:28,218 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 16:38:29,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:38:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:38:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:38:29,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:38:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:29,825 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:38:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:38:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:38:31,097 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 16:38:31,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:38:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:38:32,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:38:32,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556396775] [2021-10-07 16:38:32,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556396775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:38:32,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:38:32,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:38:32,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324915191] [2021-10-07 16:38:32,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:38:32,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:38:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:38:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:38:32,143 INFO L87 Difference]: Start difference. First operand 8156 states and 38103 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:38:39,614 INFO L93 Difference]: Finished difference Result 13252 states and 59573 transitions. [2021-10-07 16:38:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 16:38:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:38:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:38:39,663 INFO L225 Difference]: With dead ends: 13252 [2021-10-07 16:38:39,663 INFO L226 Difference]: Without dead ends: 13252 [2021-10-07 16:38:39,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5210.4ms TimeCoverageRelationStatistics Valid=424, Invalid=1136, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 16:38:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2021-10-07 16:38:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 8156. [2021-10-07 16:38:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8156 states, 8151 states have (on average 4.672310145994357) internal successors, (38084), 8155 states have internal predecessors, (38084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:38:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8156 states to 8156 states and 38084 transitions. [2021-10-07 16:38:39,926 INFO L78 Accepts]: Start accepts. Automaton has 8156 states and 38084 transitions. Word has length 24 [2021-10-07 16:38:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:38:39,926 INFO L470 AbstractCegarLoop]: Abstraction has 8156 states and 38084 transitions. [2021-10-07 16:38:39,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8156 states and 38084 transitions. [2021-10-07 16:38:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:38:39,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:38:39,936 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 16:38:39,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-07 16:38:40,149 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 16:38:40,150 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:38:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:38:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 610891389, now seen corresponding path program 27 times [2021-10-07 16:38:40,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:38:40,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528293565] [2021-10-07 16:38:40,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 16:38:40,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:38:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:38:40,153 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 16:38:40,154 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 16:38:41,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 16:38:41,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:38:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:38:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:38:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:41,785 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:38:41,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:38:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:38:43,047 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 16:38:43,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:38:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:38:43,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:38:43,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528293565] [2021-10-07 16:38:43,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528293565] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:38:43,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:38:43,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:38:43,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579574922] [2021-10-07 16:38:43,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:38:43,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:38:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:38:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:38:43,901 INFO L87 Difference]: Start difference. First operand 8156 states and 38084 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:38:52,881 INFO L93 Difference]: Finished difference Result 15562 states and 71132 transitions. [2021-10-07 16:38:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 16:38:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:38:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:38:52,944 INFO L225 Difference]: With dead ends: 15562 [2021-10-07 16:38:52,944 INFO L226 Difference]: Without dead ends: 15562 [2021-10-07 16:38:52,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5391.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 16:38:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15562 states. [2021-10-07 16:38:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15562 to 8168. [2021-10-07 16:38:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8163 states have (on average 4.671689329903222) internal successors, (38135), 8167 states have internal predecessors, (38135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:38:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 38135 transitions. [2021-10-07 16:38:53,229 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 38135 transitions. Word has length 24 [2021-10-07 16:38:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:38:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 8168 states and 38135 transitions. [2021-10-07 16:38:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:38:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 38135 transitions. [2021-10-07 16:38:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:38:53,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:38:53,238 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 16:38:53,252 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 16:38:53,439 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 16:38:53,439 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:38:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:38:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 824491013, now seen corresponding path program 28 times [2021-10-07 16:38:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:38:53,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20545252] [2021-10-07 16:38:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 16:38:53,441 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:38:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:38:53,442 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 16:38:53,444 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 16:38:54,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 16:38:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:38:54,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:38:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:38:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:54,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:38:55,004 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:38:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:38:55,255 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 15 treesize of output 11 [2021-10-07 16:38:56,224 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 16:38:56,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:38:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:38:57,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:38:57,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20545252] [2021-10-07 16:38:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20545252] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:38:57,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:38:57,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:38:57,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394168093] [2021-10-07 16:38:57,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:38:57,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:38:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:38:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:38:57,090 INFO L87 Difference]: Start difference. First operand 8168 states and 38135 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:39:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:05,086 INFO L93 Difference]: Finished difference Result 15628 states and 71416 transitions. [2021-10-07 16:39:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 16:39:05,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:39:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:05,150 INFO L225 Difference]: With dead ends: 15628 [2021-10-07 16:39:05,150 INFO L226 Difference]: Without dead ends: 15628 [2021-10-07 16:39:05,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4801.6ms TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 16:39:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15628 states. [2021-10-07 16:39:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15628 to 8174. [2021-10-07 16:39:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8169 states have (on average 4.671930468845636) internal successors, (38165), 8173 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 38165 transitions. [2021-10-07 16:39:05,561 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 38165 transitions. Word has length 24 [2021-10-07 16:39:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 38165 transitions. [2021-10-07 16:39:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:39:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 38165 transitions. [2021-10-07 16:39:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:39:05,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:05,569 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 16:39:05,582 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 16:39:05,769 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 16:39:05,770 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:39:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash -248594367, now seen corresponding path program 29 times [2021-10-07 16:39:05,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:05,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754020041] [2021-10-07 16:39:05,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 16:39:05,773 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:05,774 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 16:39:05,778 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 16:39:06,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 16:39:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:39:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 16:39:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:08,085 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 16:39:08,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:39:08,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:08,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754020041] [2021-10-07 16:39:08,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754020041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:39:08,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:39:08,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-07 16:39:08,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601147251] [2021-10-07 16:39:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 16:39:08,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 16:39:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-07 16:39:08,970 INFO L87 Difference]: Start difference. First operand 8174 states and 38165 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 16:39:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:17,453 INFO L93 Difference]: Finished difference Result 15574 states and 71203 transitions. [2021-10-07 16:39:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 16:39:17,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 24 [2021-10-07 16:39:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:17,514 INFO L225 Difference]: With dead ends: 15574 [2021-10-07 16:39:17,514 INFO L226 Difference]: Without dead ends: 15574 [2021-10-07 16:39:17,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 5401.5ms TimeCoverageRelationStatistics Valid=444, Invalid=1536, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 16:39:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15574 states. [2021-10-07 16:39:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15574 to 8162. [2021-10-07 16:39:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8157 states have (on average 4.672183400760083) internal successors, (38111), 8161 states have internal predecessors, (38111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 38111 transitions. [2021-10-07 16:39:17,793 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 38111 transitions. Word has length 24 [2021-10-07 16:39:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:17,793 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 38111 transitions. [2021-10-07 16:39:17,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 16:39:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 38111 transitions. [2021-10-07 16:39:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:39:17,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:17,804 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 16:39:17,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2021-10-07 16:39:18,018 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 16:39:18,019 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:39:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1355969517, now seen corresponding path program 30 times [2021-10-07 16:39:18,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:18,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492591667] [2021-10-07 16:39:18,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 16:39:18,021 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:18,022 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 16:39:18,023 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 16:39:19,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 16:39:19,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 16:39:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:39:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:19,771 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:39:19,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:39:19,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 16:39:21,018 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 16:39:21,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 16:39:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 16:39:21,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 16:39:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492591667] [2021-10-07 16:39:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492591667] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 16:39:21,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 16:39:21,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-07 16:39:21,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528702138] [2021-10-07 16:39:21,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 16:39:21,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 16:39:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 16:39:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 16:39:21,819 INFO L87 Difference]: Start difference. First operand 8162 states and 38111 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:39:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 16:39:31,436 INFO L93 Difference]: Finished difference Result 15364 states and 70131 transitions. [2021-10-07 16:39:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 16:39:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 24 [2021-10-07 16:39:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 16:39:31,498 INFO L225 Difference]: With dead ends: 15364 [2021-10-07 16:39:31,498 INFO L226 Difference]: Without dead ends: 15364 [2021-10-07 16:39:31,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 6006.1ms TimeCoverageRelationStatistics Valid=519, Invalid=1461, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 16:39:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15364 states. [2021-10-07 16:39:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15364 to 8166. [2021-10-07 16:39:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8161 states have (on average 4.671118735449087) internal successors, (38121), 8165 states have internal predecessors, (38121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 16:39:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 38121 transitions. [2021-10-07 16:39:31,802 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 38121 transitions. Word has length 24 [2021-10-07 16:39:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 16:39:31,803 INFO L470 AbstractCegarLoop]: Abstraction has 8166 states and 38121 transitions. [2021-10-07 16:39:31,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:39:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 38121 transitions. [2021-10-07 16:39:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 16:39:31,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 16:39:31,811 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 16:39:31,825 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 16:39:32,011 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 16:39:32,012 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 39 more)] === [2021-10-07 16:39:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 16:39:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2016064897, now seen corresponding path program 31 times [2021-10-07 16:39:32,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 16:39:32,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729807873] [2021-10-07 16:39:32,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 16:39:32,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 16:39:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 16:39:32,015 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 16:39:32,016 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 16:39:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 16:39:33,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 16:39:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 16:39:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 16:39:33,600 INFO L354 Elim1Store]: treesize reduction 229, result has 22.6 percent of original size [2021-10-07 16:39:33,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 74 [2021-10-07 16:39:33,790 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 15 treesize of output 11 Received shutdown request... [2021-10-07 16:39:34,561 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-10-07 16:39:34,563 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:39:34,570 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:39:34,579 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 16:39:34,580 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 16:39:34,764 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 16:39:34,764 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,768 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 16:39:34,770 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-07 16:39:34,771 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,772 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0REQUIRES_VIOLATION [2021-10-07 16:39:34,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1REQUIRES_VIOLATION [2021-10-07 16:39:34,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2REQUIRES_VIOLATION [2021-10-07 16:39:34,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3REQUIRES_VIOLATION [2021-10-07 16:39:34,783 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 16:39:34,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 16:39:34,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 04:39:34 BasicIcfg [2021-10-07 16:39:34,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 16:39:34,787 INFO L168 Benchmark]: Toolchain (without parser) took 814442.30 ms. Allocated memory was 155.2 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 129.9 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,787 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 16:39:34,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.58 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 115.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.31 ms. Allocated memory is still 155.2 MB. Free memory was 115.8 MB in the beginning and 113.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,788 INFO L168 Benchmark]: Boogie Preprocessor took 96.29 ms. Allocated memory is still 155.2 MB. Free memory was 113.9 MB in the beginning and 112.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,789 INFO L168 Benchmark]: RCFGBuilder took 959.34 ms. Allocated memory is still 155.2 MB. Free memory was 112.2 MB in the beginning and 125.8 MB in the end (delta: -13.5 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,789 INFO L168 Benchmark]: TraceAbstraction took 812901.31 ms. Allocated memory was 155.2 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 124.9 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-10-07 16:39:34,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 367.58 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 115.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 94.31 ms. Allocated memory is still 155.2 MB. Free memory was 115.8 MB in the beginning and 113.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.29 ms. Allocated memory is still 155.2 MB. Free memory was 113.9 MB in the beginning and 112.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 959.34 ms. Allocated memory is still 155.2 MB. Free memory was 112.2 MB in the beginning and 125.8 MB in the end (delta: -13.5 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 812901.31 ms. Allocated memory was 155.2 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 124.9 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 33597.2ms, 192 PlacesBefore, 63 PlacesAfterwards, 197 TransitionsBefore, 59 TransitionsAfterwards, 5658 CoEnabledTransitionPairs, 7 FixpointIterations, 92 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 22 ConcurrentYvCompositions, 9 ChoiceCompositions, 214 TotalNumberOfCompositions, 7883 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6702, positive: 6641, positive conditional: 0, positive unconditional: 6641, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3710, positive: 3690, positive conditional: 0, positive unconditional: 3690, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3710, positive: 3690, positive conditional: 0, positive unconditional: 3690, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1705, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1705, negative conditional: 0, negative unconditional: 1705, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6702, positive: 2951, positive conditional: 0, positive unconditional: 2951, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 3710, unknown conditional: 0, unknown unconditional: 3710] , Statistics on independence cache: Total cache size (in pairs): 227, Positive cache size: 221, Positive conditional cache size: 0, Positive unconditional cache size: 221, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 249 locations, 43 error locations. Started 1 CEGAR loops. OverallTime: 812668.3ms, OverallIterations: 69, TraceHistogramMax: 14, EmptinessCheckTime: 354.7ms, AutomataDifference: 546683.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33766.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3859 SDtfs, 31873 SDslu, 24765 SDs, 0 SdLazy, 37940 SolverSat, 2513 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 239171.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3085 GetRequests, 1385 SyntacticMatches, 26 SemanticMatches, 1674 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11701 ImplicationChecksByTransitivity, 343992.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8174occurred in iteration=66, InterpolantAutomatonStates: 1341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13854.0ms AutomataMinimizationTime, 68 MinimizatonAttempts, 272080 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 677.1ms SsaConstructionTime, 8717.0ms SatisfiabilityAnalysisTime, 164838.2ms InterpolantComputationTime, 1135 NumberOfCodeBlocks, 1133 NumberOfCodeBlocksAsserted, 121 NumberOfCheckSat, 2134 ConstructedInterpolants, 148 QuantifiedInterpolants, 29213 SizeOfPredicates, 846 NumberOfNonLiveVariables, 7819 ConjunctsInSsa, 1129 ConjunctsInUnsatCore, 136 InterpolantComputations, 38 PerfectInterpolantSequences, 344/1128 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown