/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/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 19:50:05,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:50:05,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:50:05,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:50:05,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:50:05,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:50:05,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:50:05,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:50:05,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:50:05,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:50:05,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:50:05,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:50:05,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:50:05,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:50:05,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:50:05,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:50:05,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:50:05,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:50:05,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:50:05,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:50:05,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 19:50:05,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:50:05,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:50:05,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:50:05,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:50:05,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:50:05,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:50:05,301 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:50:05,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:50:05,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:50:05,301 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:50:05,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:50:05,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:50:05,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:50:05,302 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 19:50:05,302 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 19:50:05,303 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 19:50:05,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:50:05,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 19:50:05,303 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 19:50:05,304 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 19:50:05,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:50:05,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:50:05,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:50:05,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:50:05,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:50:05,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:05,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:50:05,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:50:05,306 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 19:50:05,306 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 19:50:05,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:50:05,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 19:50:05,306 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:50:05,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:50:05,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:50:05,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:50:05,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:50:05,862 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:50:05,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-10-13 19:50:05,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca0324309/e971b303179b4e0a838a7c930320698f/FLAGf260c8fb0 [2021-10-13 19:50:06,738 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:50:06,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-10-13 19:50:06,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca0324309/e971b303179b4e0a838a7c930320698f/FLAGf260c8fb0 [2021-10-13 19:50:07,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca0324309/e971b303179b4e0a838a7c930320698f [2021-10-13 19:50:07,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:50:07,072 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 19:50:07,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:50:07,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:50:07,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c3a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07, skipping insertion in model container [2021-10-13 19:50:07,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:50:07,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:50:07,373 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/array-eq-symm.wvr.c[2251,2264] [2021-10-13 19:50:07,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,401 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 19:50:07,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:50:07,420 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/array-eq-symm.wvr.c[2251,2264] [2021-10-13 19:50:07,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,433 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:50:07,487 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/array-eq-symm.wvr.c[2251,2264] [2021-10-13 19:50:07,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:50:07,527 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:50:07,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07 WrapperNode [2021-10-13 19:50:07,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:50:07,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:50:07,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:50:07,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:50:07,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:50:07,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:50:07,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:50:07,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:50:07,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:50:07,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:50:07,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (1/1) ... [2021-10-13 19:50:07,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:50:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:50:07,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 19:50:07,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 19:50:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:50:07,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:50:07,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:50:07,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:50:07,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 19:50:07,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:50:07,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 19:50:07,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 19:50:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:50:07,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:50:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:50:07,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 19:50:07,794 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 19:50:08,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:50:08,638 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-13 19:50:08,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:08 BoogieIcfgContainer [2021-10-13 19:50:08,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:50:08,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:50:08,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:50:08,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:50:08,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:07" (1/3) ... [2021-10-13 19:50:08,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a89dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:08, skipping insertion in model container [2021-10-13 19:50:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:07" (2/3) ... [2021-10-13 19:50:08,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a89dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:08, skipping insertion in model container [2021-10-13 19:50:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:08" (3/3) ... [2021-10-13 19:50:08,666 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-10-13 19:50:08,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:50:08,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2021-10-13 19:50:08,673 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:50:08,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,740 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,740 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,740 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,741 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,741 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,742 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,742 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,743 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,743 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,743 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,743 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,744 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,744 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,744 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,745 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,745 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,746 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,746 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,747 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,747 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,747 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,747 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,748 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,749 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,749 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,751 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,752 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,752 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,754 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,754 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,755 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,755 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,755 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,756 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,756 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,758 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,758 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,759 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,759 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,759 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,761 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,761 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,762 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,762 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,762 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,762 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,763 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,763 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,763 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,772 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,773 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,773 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,774 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,775 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,781 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,782 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,783 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:50:08,795 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 19:50:08,872 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:50:08,892 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 19:50:08,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2021-10-13 19:50:08,921 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:50:08,936 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 176 transitions, 368 flow [2021-10-13 19:50:08,942 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 176 transitions, 368 flow [2021-10-13 19:50:08,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 168 places, 176 transitions, 368 flow [2021-10-13 19:50:09,076 INFO L129 PetriNetUnfolder]: 15/174 cut-off events. [2021-10-13 19:50:09,077 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 19:50:09,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 231 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2021-10-13 19:50:09,091 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2021-10-13 19:50:37,203 INFO L131 LiptonReduction]: Checked pairs total: 2614 [2021-10-13 19:50:37,204 INFO L133 LiptonReduction]: Total number of compositions: 195 [2021-10-13 19:50:37,214 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 43 transitions, 102 flow [2021-10-13 19:50:37,240 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 19:50:37,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:37,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 19:50:37,252 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash 21768, now seen corresponding path program 1 times [2021-10-13 19:50:37,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:37,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102670643] [2021-10-13 19:50:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:37,277 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:37,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:50:37,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 19:50:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:50:37,845 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:50:37,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 19:50:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:37,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:38,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:38,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102670643] [2021-10-13 19:50:38,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102670643] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:38,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:38,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:50:38,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594936142] [2021-10-13 19:50:38,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:50:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:50:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:38,096 INFO L87 Difference]: Start difference. First operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:38,763 INFO L93 Difference]: Finished difference Result 465 states and 1221 transitions. [2021-10-13 19:50:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:50:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 19:50:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:38,793 INFO L225 Difference]: With dead ends: 465 [2021-10-13 19:50:38,794 INFO L226 Difference]: Without dead ends: 465 [2021-10-13 19:50:38,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:50:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-10-13 19:50:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 236. [2021-10-13 19:50:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 4.622222222222222) internal successors, (624), 235 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 624 transitions. [2021-10-13 19:50:38,866 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 624 transitions. Word has length 2 [2021-10-13 19:50:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:38,867 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 624 transitions. [2021-10-13 19:50:38,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 624 transitions. [2021-10-13 19:50:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 19:50:38,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:38,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 19:50:38,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:39,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:50:39,083 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 21769, now seen corresponding path program 1 times [2021-10-13 19:50:39,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:39,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592063389] [2021-10-13 19:50:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:39,086 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:39,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:50:39,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 19:50:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 19:50:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:39,336 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:50:39,337 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 19:50:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:39,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:39,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:39,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592063389] [2021-10-13 19:50:39,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592063389] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:39,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:39,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 19:50:39,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820848559] [2021-10-13 19:50:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:50:39,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:50:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:39,853 INFO L87 Difference]: Start difference. First operand 236 states and 624 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:40,093 INFO L93 Difference]: Finished difference Result 234 states and 618 transitions. [2021-10-13 19:50:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:40,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 19:50:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:40,097 INFO L225 Difference]: With dead ends: 234 [2021-10-13 19:50:40,099 INFO L226 Difference]: Without dead ends: 234 [2021-10-13 19:50:40,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:50:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-13 19:50:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-10-13 19:50:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 135 states have (on average 4.5777777777777775) internal successors, (618), 233 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 618 transitions. [2021-10-13 19:50:40,141 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 618 transitions. Word has length 2 [2021-10-13 19:50:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:40,142 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 618 transitions. [2021-10-13 19:50:40,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 618 transitions. [2021-10-13 19:50:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:40,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:40,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:40,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:40,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:50:40,355 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:40,356 INFO L82 PathProgramCache]: Analyzing trace with hash 679165, now seen corresponding path program 1 times [2021-10-13 19:50:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:40,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088653887] [2021-10-13 19:50:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:40,364 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:40,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:50:40,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 19:50:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:50:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:40,756 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-13 19:50:40,757 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 4 case distinctions, treesize of input 44 treesize of output 72 [2021-10-13 19:50:40,777 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 111 treesize of output 109 [2021-10-13 19:50:42,174 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-13 19:50:42,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 39 [2021-10-13 19:50:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:43,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:50:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:50:43,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:50:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088653887] [2021-10-13 19:50:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088653887] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:50:43,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:50:43,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 19:50:43,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960627962] [2021-10-13 19:50:43,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:50:43,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:50:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:50:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:43,981 INFO L87 Difference]: Start difference. First operand 234 states and 618 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:50:44,511 INFO L93 Difference]: Finished difference Result 191 states and 483 transitions. [2021-10-13 19:50:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:50:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 19:50:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:50:44,515 INFO L225 Difference]: With dead ends: 191 [2021-10-13 19:50:44,515 INFO L226 Difference]: Without dead ends: 191 [2021-10-13 19:50:44,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1615.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:50:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-13 19:50:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-10-13 19:50:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 118 states have (on average 4.093220338983051) internal successors, (483), 190 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 483 transitions. [2021-10-13 19:50:44,527 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 483 transitions. Word has length 3 [2021-10-13 19:50:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:50:44,527 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 483 transitions. [2021-10-13 19:50:44,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:50:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 483 transitions. [2021-10-13 19:50:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:50:44,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:50:44,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:50:44,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 19:50:44,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:50:44,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:50:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:50:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 679166, now seen corresponding path program 1 times [2021-10-13 19:50:44,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:50:44,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795116192] [2021-10-13 19:50:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:50:44,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:50:44,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:50:44,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:50:44,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 19:50:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:50:44,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:50:44,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:50:44,975 INFO L354 Elim1Store]: treesize reduction 235, result has 17.8 percent of original size [2021-10-13 19:50:44,978 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 6 case distinctions, treesize of input 150 treesize of output 182 [2021-10-13 19:50:46,840 INFO L354 Elim1Store]: treesize reduction 138, result has 41.3 percent of original size [2021-10-13 19:50:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 171 [2021-10-13 19:51:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:02,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:02,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:02,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795116192] [2021-10-13 19:51:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795116192] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:02,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:02,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:02,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188156668] [2021-10-13 19:51:02,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:02,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:02,108 INFO L87 Difference]: Start difference. First operand 191 states and 483 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:02,370 INFO L93 Difference]: Finished difference Result 148 states and 348 transitions. [2021-10-13 19:51:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 19:51:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:02,374 INFO L225 Difference]: With dead ends: 148 [2021-10-13 19:51:02,374 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 19:51:02,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2478.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 19:51:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-13 19:51:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 101 states have (on average 3.4455445544554455) internal successors, (348), 147 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 348 transitions. [2021-10-13 19:51:02,385 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 348 transitions. Word has length 3 [2021-10-13 19:51:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 348 transitions. [2021-10-13 19:51:02,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 348 transitions. [2021-10-13 19:51:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:51:02,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:02,387 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 19:51:02,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:02,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:02,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 21030344, now seen corresponding path program 1 times [2021-10-13 19:51:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:02,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441512191] [2021-10-13 19:51:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:02,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:02,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:02,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 19:51:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:02,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 19:51:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:51:02,908 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:51:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 19:51:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:03,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:03,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:03,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441512191] [2021-10-13 19:51:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441512191] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:51:03,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:51:03,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:51:03,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317628337] [2021-10-13 19:51:03,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:03,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:03,636 INFO L87 Difference]: Start difference. First operand 148 states and 348 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) [2021-10-13 19:51:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:09,393 INFO L93 Difference]: Finished difference Result 851 states and 2029 transitions. [2021-10-13 19:51:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 19:51:09,395 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 [2021-10-13 19:51:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:09,403 INFO L225 Difference]: With dead ends: 851 [2021-10-13 19:51:09,404 INFO L226 Difference]: Without dead ends: 851 [2021-10-13 19:51:09,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 822.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-10-13 19:51:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 156. [2021-10-13 19:51:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 3.3394495412844036) internal successors, (364), 155 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 364 transitions. [2021-10-13 19:51:09,423 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 364 transitions. Word has length 4 [2021-10-13 19:51:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:09,423 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 364 transitions. [2021-10-13 19:51:09,424 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) [2021-10-13 19:51:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 364 transitions. [2021-10-13 19:51:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:51:09,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:09,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:51:09,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:09,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:09,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash 652691274, now seen corresponding path program 1 times [2021-10-13 19:51:09,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:09,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692691135] [2021-10-13 19:51:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:09,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:09,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 19:51:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:51:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:09,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:51:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:09,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:10,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:10,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692691135] [2021-10-13 19:51:10,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692691135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:10,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:10,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 19:51:10,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830675631] [2021-10-13 19:51:10,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:10,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:10,150 INFO L87 Difference]: Start difference. First operand 156 states and 364 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:11,803 INFO L93 Difference]: Finished difference Result 442 states and 1024 transitions. [2021-10-13 19:51:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:11,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 19:51:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:11,815 INFO L225 Difference]: With dead ends: 442 [2021-10-13 19:51:11,816 INFO L226 Difference]: Without dead ends: 442 [2021-10-13 19:51:11,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-10-13 19:51:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 204. [2021-10-13 19:51:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 157 states have (on average 3.961783439490446) internal successors, (622), 203 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 622 transitions. [2021-10-13 19:51:11,834 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 622 transitions. Word has length 5 [2021-10-13 19:51:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:11,835 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 622 transitions. [2021-10-13 19:51:11,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 622 transitions. [2021-10-13 19:51:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:51:11,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:11,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:51:11,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:12,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:12,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 652691275, now seen corresponding path program 1 times [2021-10-13 19:51:12,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:12,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874786307] [2021-10-13 19:51:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:12,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:12,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:12,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 19:51:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:12,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:51:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 19:51:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:12,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:12,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:12,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874786307] [2021-10-13 19:51:12,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874786307] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:12,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:12,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 19:51:12,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792099322] [2021-10-13 19:51:12,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:12,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:12,172 INFO L87 Difference]: Start difference. First operand 204 states and 622 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:12,333 INFO L93 Difference]: Finished difference Result 166 states and 483 transitions. [2021-10-13 19:51:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:51:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 19:51:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:12,337 INFO L225 Difference]: With dead ends: 166 [2021-10-13 19:51:12,337 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 19:51:12,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:51:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 19:51:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-10-13 19:51:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 132 states have (on average 3.659090909090909) internal successors, (483), 165 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 483 transitions. [2021-10-13 19:51:12,344 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 483 transitions. Word has length 5 [2021-10-13 19:51:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 483 transitions. [2021-10-13 19:51:12,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 483 transitions. [2021-10-13 19:51:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:51:12,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:12,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:51:12,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:12,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:12,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 652691216, now seen corresponding path program 1 times [2021-10-13 19:51:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:12,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096195453] [2021-10-13 19:51:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:12,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:12,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:12,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:12,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 19:51:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:51:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:12,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:12,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:12,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096195453] [2021-10-13 19:51:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096195453] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:12,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:12,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 19:51:12,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514357954] [2021-10-13 19:51:12,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:51:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:51:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:12,753 INFO L87 Difference]: Start difference. First operand 166 states and 483 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:13,105 INFO L93 Difference]: Finished difference Result 225 states and 593 transitions. [2021-10-13 19:51:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:51:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 19:51:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:13,108 INFO L225 Difference]: With dead ends: 225 [2021-10-13 19:51:13,108 INFO L226 Difference]: Without dead ends: 225 [2021-10-13 19:51:13,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-13 19:51:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 188. [2021-10-13 19:51:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 154 states have (on average 3.4545454545454546) internal successors, (532), 187 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 532 transitions. [2021-10-13 19:51:13,134 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 532 transitions. Word has length 5 [2021-10-13 19:51:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:13,134 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 532 transitions. [2021-10-13 19:51:13,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 532 transitions. [2021-10-13 19:51:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:51:13,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:13,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:51:13,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 19:51:13,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:13,338 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 652691314, now seen corresponding path program 1 times [2021-10-13 19:51:13,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:13,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130089887] [2021-10-13 19:51:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:13,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:13,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:13,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 19:51:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:51:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:13,558 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:51:13,558 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 5 case distinctions, treesize of input 93 treesize of output 128 [2021-10-13 19:51:15,751 INFO L354 Elim1Store]: treesize reduction 127, result has 46.0 percent of original size [2021-10-13 19:51:15,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 183 [2021-10-13 19:51:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:35,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:35,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:35,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130089887] [2021-10-13 19:51:35,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130089887] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:35,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:35,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:51:35,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007607354] [2021-10-13 19:51:35,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:51:35,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:51:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:35,195 INFO L87 Difference]: Start difference. First operand 188 states and 532 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:35,389 INFO L93 Difference]: Finished difference Result 173 states and 494 transitions. [2021-10-13 19:51:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 19:51:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:35,392 INFO L225 Difference]: With dead ends: 173 [2021-10-13 19:51:35,392 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 19:51:35,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:51:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 19:51:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-10-13 19:51:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 3.360544217687075) internal successors, (494), 172 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 494 transitions. [2021-10-13 19:51:35,400 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 494 transitions. Word has length 5 [2021-10-13 19:51:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:35,401 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 494 transitions. [2021-10-13 19:51:35,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 494 transitions. [2021-10-13 19:51:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:51:35,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:35,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 19:51:35,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:35,611 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 652691315, now seen corresponding path program 1 times [2021-10-13 19:51:35,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:35,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695637418] [2021-10-13 19:51:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:35,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:35,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:35,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:35,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 19:51:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 19:51:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:35,842 INFO L354 Elim1Store]: treesize reduction 155, result has 19.7 percent of original size [2021-10-13 19:51:35,842 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 4 case distinctions, treesize of input 44 treesize of output 68 [2021-10-13 19:51:35,859 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 95 treesize of output 93 [2021-10-13 19:51:36,205 INFO L354 Elim1Store]: treesize reduction 64, result has 27.3 percent of original size [2021-10-13 19:51:36,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-10-13 19:51:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:39,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:51:39,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:39,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695637418] [2021-10-13 19:51:39,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695637418] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:39,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:39,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 19:51:39,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253362370] [2021-10-13 19:51:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:51:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:51:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:51:39,467 INFO L87 Difference]: Start difference. First operand 173 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:40,366 INFO L93 Difference]: Finished difference Result 158 states and 456 transitions. [2021-10-13 19:51:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:51:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 19:51:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:40,370 INFO L225 Difference]: With dead ends: 158 [2021-10-13 19:51:40,370 INFO L226 Difference]: Without dead ends: 158 [2021-10-13 19:51:40,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:51:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-13 19:51:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-10-13 19:51:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 140 states have (on average 3.257142857142857) internal successors, (456), 157 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 456 transitions. [2021-10-13 19:51:40,377 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 456 transitions. Word has length 5 [2021-10-13 19:51:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:40,377 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 456 transitions. [2021-10-13 19:51:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 456 transitions. [2021-10-13 19:51:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 19:51:40,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:40,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 19:51:40,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:40,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:40,591 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1263817526, now seen corresponding path program 1 times [2021-10-13 19:51:40,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:40,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859913193] [2021-10-13 19:51:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:40,594 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:40,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:40,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 19:51:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:40,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:51:40,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:51:40,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:51:40,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:40,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859913193] [2021-10-13 19:51:40,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859913193] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:40,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:40,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 19:51:40,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617000175] [2021-10-13 19:51:40,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:51:40,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:51:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:51:40,888 INFO L87 Difference]: Start difference. First operand 158 states and 456 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:41,331 INFO L93 Difference]: Finished difference Result 316 states and 742 transitions. [2021-10-13 19:51:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:51:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 19:51:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:41,334 INFO L225 Difference]: With dead ends: 316 [2021-10-13 19:51:41,334 INFO L226 Difference]: Without dead ends: 316 [2021-10-13 19:51:41,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:51:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-13 19:51:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 158. [2021-10-13 19:51:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 140 states have (on average 3.257142857142857) internal successors, (456), 157 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 456 transitions. [2021-10-13 19:51:41,342 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 456 transitions. Word has length 6 [2021-10-13 19:51:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 456 transitions. [2021-10-13 19:51:41,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 456 transitions. [2021-10-13 19:51:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:51:41,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:41,344 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:41,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:41,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:41,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -523911671, now seen corresponding path program 1 times [2021-10-13 19:51:41,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:41,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323400186] [2021-10-13 19:51:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:41,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:41,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:41,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 19:51:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:51:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:41,853 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:51:41,854 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 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-13 19:51:42,227 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 19:51:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 19:51:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 19:51:42,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:51:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 19:51:46,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:51:46,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323400186] [2021-10-13 19:51:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323400186] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:51:46,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:51:46,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-13 19:51:46,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806146991] [2021-10-13 19:51:46,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 19:51:46,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:51:46,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 19:51:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-13 19:51:46,389 INFO L87 Difference]: Start difference. First operand 158 states and 456 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:51:46,551 INFO L93 Difference]: Finished difference Result 126 states and 342 transitions. [2021-10-13 19:51:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:51:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:51:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:51:46,555 INFO L225 Difference]: With dead ends: 126 [2021-10-13 19:51:46,555 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 19:51:46,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4082.5ms TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2021-10-13 19:51:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 19:51:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-13 19:51:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 115 states have (on average 2.973913043478261) internal successors, (342), 125 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 342 transitions. [2021-10-13 19:51:46,561 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 342 transitions. Word has length 7 [2021-10-13 19:51:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:51:46,562 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 342 transitions. [2021-10-13 19:51:46,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:51:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 342 transitions. [2021-10-13 19:51:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:51:46,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:51:46,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:51:46,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 19:51:46,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:51:46,776 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:51:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:51:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash -523911670, now seen corresponding path program 1 times [2021-10-13 19:51:46,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:51:46,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505072812] [2021-10-13 19:51:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:51:46,778 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:51:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:51:46,780 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:51:46,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 19:51:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:51:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:51:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:51:46,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:51:47,132 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:51:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:51:47,303 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:51:47,304 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:51:59,395 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-13 19:51:59,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 174 [2021-10-13 19:51:59,467 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-13 19:51:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 221 [2021-10-13 19:52:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:00,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:01,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:01,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505072812] [2021-10-13 19:52:01,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505072812] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:01,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:01,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-13 19:52:01,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660461131] [2021-10-13 19:52:01,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 19:52:01,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 19:52:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 19:52:01,367 INFO L87 Difference]: Start difference. First operand 126 states and 342 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:08,172 INFO L93 Difference]: Finished difference Result 439 states and 1037 transitions. [2021-10-13 19:52:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:52:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:52:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:08,176 INFO L225 Difference]: With dead ends: 439 [2021-10-13 19:52:08,176 INFO L226 Difference]: Without dead ends: 439 [2021-10-13 19:52:08,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4039.1ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:52:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-13 19:52:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 144. [2021-10-13 19:52:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 133 states have (on average 2.9473684210526314) internal successors, (392), 143 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 392 transitions. [2021-10-13 19:52:08,185 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 392 transitions. Word has length 7 [2021-10-13 19:52:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 392 transitions. [2021-10-13 19:52:08,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 392 transitions. [2021-10-13 19:52:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:52:08,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:08,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:08,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:08,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:08,401 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash 171144190, now seen corresponding path program 1 times [2021-10-13 19:52:08,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:08,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795661363] [2021-10-13 19:52:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:52:08,403 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:08,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:08,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 19:52:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:52:08,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:08,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:08,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:08,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795661363] [2021-10-13 19:52:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795661363] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:52:08,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:52:08,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 19:52:08,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003971645] [2021-10-13 19:52:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:52:08,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:52:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:52:08,689 INFO L87 Difference]: Start difference. First operand 144 states and 392 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:08,957 INFO L93 Difference]: Finished difference Result 164 states and 419 transitions. [2021-10-13 19:52:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:52:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:52:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:08,959 INFO L225 Difference]: With dead ends: 164 [2021-10-13 19:52:08,959 INFO L226 Difference]: Without dead ends: 164 [2021-10-13 19:52:08,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:52:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-13 19:52:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2021-10-13 19:52:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 144 states have (on average 2.8541666666666665) internal successors, (411), 154 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2021-10-13 19:52:08,965 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 7 [2021-10-13 19:52:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:08,966 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2021-10-13 19:52:08,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2021-10-13 19:52:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:52:08,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:08,967 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 19:52:08,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 19:52:09,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:09,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:09,180 INFO L82 PathProgramCache]: Analyzing trace with hash 229275464, now seen corresponding path program 2 times [2021-10-13 19:52:09,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:09,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155274586] [2021-10-13 19:52:09,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:52:09,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:09,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:09,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 19:52:09,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:52:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:52:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:52:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:09,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:52:09,515 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:52:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 19:52:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:09,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:52:11,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:11,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155274586] [2021-10-13 19:52:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155274586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:11,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 19:52:11,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048127829] [2021-10-13 19:52:11,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:52:11,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:52:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:52:11,628 INFO L87 Difference]: Start difference. First operand 155 states and 411 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) [2021-10-13 19:52:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:31,766 INFO L93 Difference]: Finished difference Result 1010 states and 2795 transitions. [2021-10-13 19:52:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:52:31,769 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 [2021-10-13 19:52:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:31,777 INFO L225 Difference]: With dead ends: 1010 [2021-10-13 19:52:31,777 INFO L226 Difference]: Without dead ends: 1010 [2021-10-13 19:52:31,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6219.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:52:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-10-13 19:52:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 172. [2021-10-13 19:52:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 161 states have (on average 2.7639751552795033) internal successors, (445), 171 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 445 transitions. [2021-10-13 19:52:31,795 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 445 transitions. Word has length 8 [2021-10-13 19:52:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:31,795 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 445 transitions. [2021-10-13 19:52:31,796 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) [2021-10-13 19:52:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 445 transitions. [2021-10-13 19:52:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:52:31,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:31,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:31,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 19:52:32,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:32,010 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:32,011 INFO L82 PathProgramCache]: Analyzing trace with hash 947213112, now seen corresponding path program 1 times [2021-10-13 19:52:32,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:32,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550877013] [2021-10-13 19:52:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:52:32,013 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:32,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:32,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 19:52:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:52:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:32,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:32,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:32,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550877013] [2021-10-13 19:52:32,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550877013] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:52:32,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:52:32,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 19:52:32,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181514979] [2021-10-13 19:52:32,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:52:32,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:32,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:52:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:52:32,407 INFO L87 Difference]: Start difference. First operand 172 states and 445 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:32,704 INFO L93 Difference]: Finished difference Result 275 states and 723 transitions. [2021-10-13 19:52:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:52:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 19:52:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:32,708 INFO L225 Difference]: With dead ends: 275 [2021-10-13 19:52:32,708 INFO L226 Difference]: Without dead ends: 275 [2021-10-13 19:52:32,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:52:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-13 19:52:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 163. [2021-10-13 19:52:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 2.7828947368421053) internal successors, (423), 162 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 423 transitions. [2021-10-13 19:52:32,716 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 423 transitions. Word has length 8 [2021-10-13 19:52:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:32,717 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 423 transitions. [2021-10-13 19:52:32,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 423 transitions. [2021-10-13 19:52:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:52:32,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:32,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:32,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 19:52:32,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:32,931 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash -967865648, now seen corresponding path program 1 times [2021-10-13 19:52:32,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:32,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150023302] [2021-10-13 19:52:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:52:32,933 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:32,934 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:32,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 19:52:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 19:52:33,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:33,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:33,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:33,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150023302] [2021-10-13 19:52:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150023302] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:33,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:33,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 19:52:33,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671361420] [2021-10-13 19:52:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:52:33,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:52:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:52:33,403 INFO L87 Difference]: Start difference. First operand 163 states and 423 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:52:34,132 INFO L93 Difference]: Finished difference Result 308 states and 696 transitions. [2021-10-13 19:52:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:52:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:52:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:52:34,136 INFO L225 Difference]: With dead ends: 308 [2021-10-13 19:52:34,137 INFO L226 Difference]: Without dead ends: 308 [2021-10-13 19:52:34,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:52:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-13 19:52:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 202. [2021-10-13 19:52:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 191 states have (on average 2.7958115183246073) internal successors, (534), 201 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 534 transitions. [2021-10-13 19:52:34,145 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 534 transitions. Word has length 9 [2021-10-13 19:52:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:52:34,145 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 534 transitions. [2021-10-13 19:52:34,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:52:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 534 transitions. [2021-10-13 19:52:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:52:34,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:52:34,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:52:34,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 19:52:34,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:52:34,359 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:52:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:52:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -967831369, now seen corresponding path program 1 times [2021-10-13 19:52:34,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:52:34,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348930831] [2021-10-13 19:52:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:52:34,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:52:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:52:34,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:52:34,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 19:52:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:52:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:52:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:52:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:52:34,785 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:52:34,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:52:34,973 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:52:34,974 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:52:47,114 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-13 19:52:47,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 183 [2021-10-13 19:52:47,211 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-13 19:52:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 230 [2021-10-13 19:52:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:50,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:52:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:52:50,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:52:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348930831] [2021-10-13 19:52:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348930831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:52:50,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:52:50,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2021-10-13 19:52:50,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023264415] [2021-10-13 19:52:50,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 19:52:50,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:52:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 19:52:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 19:52:50,941 INFO L87 Difference]: Start difference. First operand 202 states and 534 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:01,618 INFO L93 Difference]: Finished difference Result 539 states and 1392 transitions. [2021-10-13 19:53:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:53:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:53:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:01,624 INFO L225 Difference]: With dead ends: 539 [2021-10-13 19:53:01,624 INFO L226 Difference]: Without dead ends: 539 [2021-10-13 19:53:01,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 8407.6ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:53:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-10-13 19:53:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 240. [2021-10-13 19:53:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 229 states have (on average 3.017467248908297) internal successors, (691), 239 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 691 transitions. [2021-10-13 19:53:01,635 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 691 transitions. Word has length 9 [2021-10-13 19:53:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:01,635 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 691 transitions. [2021-10-13 19:53:01,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 691 transitions. [2021-10-13 19:53:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:53:01,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:01,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:01,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:01,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:01,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash -967831464, now seen corresponding path program 1 times [2021-10-13 19:53:01,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:01,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170929837] [2021-10-13 19:53:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:53:01,851 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:01,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:01,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 19:53:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:53:02,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:53:02,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:53:02,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:02,447 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 35 treesize of output 31 [2021-10-13 19:53:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:53:02,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:02,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170929837] [2021-10-13 19:53:02,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170929837] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:02,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:02,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 19:53:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715484451] [2021-10-13 19:53:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:53:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:53:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:53:02,674 INFO L87 Difference]: Start difference. First operand 240 states and 691 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:03,753 INFO L93 Difference]: Finished difference Result 463 states and 1291 transitions. [2021-10-13 19:53:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 19:53:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:53:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:03,758 INFO L225 Difference]: With dead ends: 463 [2021-10-13 19:53:03,758 INFO L226 Difference]: Without dead ends: 463 [2021-10-13 19:53:03,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:53:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-10-13 19:53:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 258. [2021-10-13 19:53:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 247 states have (on average 3.0728744939271255) internal successors, (759), 257 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 759 transitions. [2021-10-13 19:53:03,772 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 759 transitions. Word has length 9 [2021-10-13 19:53:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:03,773 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 759 transitions. [2021-10-13 19:53:03,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 759 transitions. [2021-10-13 19:53:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:53:03,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:03,774 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:03,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:03,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:03,987 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1313381892, now seen corresponding path program 2 times [2021-10-13 19:53:03,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:03,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635955488] [2021-10-13 19:53:03,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:53:03,989 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:03,992 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:03,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 19:53:04,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:53:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:53:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:53:04,368 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:53:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:53:04,578 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:53:04,578 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:53:22,366 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-10-13 19:53:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 352 treesize of output 390 [2021-10-13 19:53:22,446 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-10-13 19:53:22,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 390 treesize of output 351 [2021-10-13 19:53:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 19:53:37,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 19:53:38,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:38,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635955488] [2021-10-13 19:53:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635955488] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:53:38,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:53:38,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 5 [2021-10-13 19:53:38,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923341289] [2021-10-13 19:53:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 19:53:38,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 19:53:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:53:38,137 INFO L87 Difference]: Start difference. First operand 258 states and 759 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:38,939 INFO L93 Difference]: Finished difference Result 320 states and 854 transitions. [2021-10-13 19:53:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:53:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 19:53:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:38,943 INFO L225 Difference]: With dead ends: 320 [2021-10-13 19:53:38,944 INFO L226 Difference]: Without dead ends: 320 [2021-10-13 19:53:38,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:53:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-13 19:53:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 250. [2021-10-13 19:53:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 239 states have (on average 2.9414225941422596) internal successors, (703), 249 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 703 transitions. [2021-10-13 19:53:38,953 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 703 transitions. Word has length 10 [2021-10-13 19:53:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:38,954 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 703 transitions. [2021-10-13 19:53:38,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 703 transitions. [2021-10-13 19:53:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:53:38,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:38,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:38,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 19:53:39,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:39,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 62001366, now seen corresponding path program 1 times [2021-10-13 19:53:39,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:39,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125255463] [2021-10-13 19:53:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:53:39,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:39,172 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:39,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 19:53:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:53:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 19:53:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:53:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:53:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:53:39,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:53:39,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125255463] [2021-10-13 19:53:39,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125255463] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:53:39,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:53:39,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 19:53:39,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695951769] [2021-10-13 19:53:39,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:53:39,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:53:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:53:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:53:39,829 INFO L87 Difference]: Start difference. First operand 250 states and 703 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) [2021-10-13 19:53:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:53:40,483 INFO L93 Difference]: Finished difference Result 338 states and 821 transitions. [2021-10-13 19:53:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:53:40,484 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 [2021-10-13 19:53:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:53:40,487 INFO L225 Difference]: With dead ends: 338 [2021-10-13 19:53:40,487 INFO L226 Difference]: Without dead ends: 338 [2021-10-13 19:53:40,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:53:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-13 19:53:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 242. [2021-10-13 19:53:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 231 states have (on average 2.8874458874458875) internal successors, (667), 241 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:53:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 667 transitions. [2021-10-13 19:53:40,496 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 667 transitions. Word has length 10 [2021-10-13 19:53:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:53:40,497 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 667 transitions. [2021-10-13 19:53:40,497 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) [2021-10-13 19:53:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 667 transitions. [2021-10-13 19:53:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:53:40,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:53:40,498 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:53:40,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 19:53:40,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:53:40,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:53:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:53:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 122302300, now seen corresponding path program 2 times [2021-10-13 19:53:40,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:53:40,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063002737] [2021-10-13 19:53:40,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:53:40,714 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:53:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:53:40,715 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:53:40,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 19:53:41,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:53:41,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:53:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:53:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:53:41,272 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:53:41,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:53:41,462 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:53:41,463 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:53:53,812 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-13 19:53:53,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 171 [2021-10-13 19:53:53,912 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-13 19:53:53,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 220 [2021-10-13 19:54:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:54:03,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:54:04,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:04,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063002737] [2021-10-13 19:54:04,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063002737] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:04,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:04,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-13 19:54:04,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838098984] [2021-10-13 19:54:04,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:54:04,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:54:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:54:04,940 INFO L87 Difference]: Start difference. First operand 242 states and 667 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-10-13 19:54:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:42,544 INFO L93 Difference]: Finished difference Result 507 states and 1277 transitions. [2021-10-13 19:54:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:54:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 [2021-10-13 19:54:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:42,548 INFO L225 Difference]: With dead ends: 507 [2021-10-13 19:54:42,548 INFO L226 Difference]: Without dead ends: 507 [2021-10-13 19:54:42,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 11647.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:54:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-10-13 19:54:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 215. [2021-10-13 19:54:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 204 states have (on average 2.965686274509804) internal successors, (605), 214 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 605 transitions. [2021-10-13 19:54:42,557 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 605 transitions. Word has length 11 [2021-10-13 19:54:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:42,558 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 605 transitions. [2021-10-13 19:54:42,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-10-13 19:54:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 605 transitions. [2021-10-13 19:54:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:54:42,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:42,558 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:42,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:42,759 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash 122302205, now seen corresponding path program 1 times [2021-10-13 19:54:42,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:42,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946329876] [2021-10-13 19:54:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:54:42,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:42,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:42,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:42,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 19:54:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:54:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:54:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:54:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 19:54:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 19:54:44,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:44,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946329876] [2021-10-13 19:54:44,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946329876] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:44,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:44,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 19:54:44,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302664710] [2021-10-13 19:54:44,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:54:44,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:54:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:54:44,626 INFO L87 Difference]: Start difference. First operand 215 states and 605 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) [2021-10-13 19:54:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:47,279 INFO L93 Difference]: Finished difference Result 361 states and 966 transitions. [2021-10-13 19:54:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:54:47,280 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 11 [2021-10-13 19:54:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:47,283 INFO L225 Difference]: With dead ends: 361 [2021-10-13 19:54:47,283 INFO L226 Difference]: Without dead ends: 361 [2021-10-13 19:54:47,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:54:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-10-13 19:54:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 251. [2021-10-13 19:54:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 240 states have (on average 3.1791666666666667) internal successors, (763), 250 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 763 transitions. [2021-10-13 19:54:47,294 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 763 transitions. Word has length 11 [2021-10-13 19:54:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:47,294 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 763 transitions. [2021-10-13 19:54:47,294 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) [2021-10-13 19:54:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 763 transitions. [2021-10-13 19:54:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:54:47,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:47,295 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:47,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:47,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -536547191, now seen corresponding path program 1 times [2021-10-13 19:54:47,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:47,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924490961] [2021-10-13 19:54:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:54:47,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:47,517 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:47,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 19:54:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:54:47,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:54:47,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:47,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:54:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:54:48,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:54:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:54:49,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:54:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924490961] [2021-10-13 19:54:49,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924490961] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:54:49,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:54:49,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-13 19:54:49,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454636063] [2021-10-13 19:54:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:54:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:54:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:54:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:54:49,531 INFO L87 Difference]: Start difference. First operand 251 states and 763 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-10-13 19:54:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:54:52,366 INFO L93 Difference]: Finished difference Result 721 states and 1948 transitions. [2021-10-13 19:54:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:54:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 12 [2021-10-13 19:54:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:54:52,371 INFO L225 Difference]: With dead ends: 721 [2021-10-13 19:54:52,372 INFO L226 Difference]: Without dead ends: 719 [2021-10-13 19:54:52,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1966.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:54:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-10-13 19:54:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 316. [2021-10-13 19:54:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 303 states have (on average 3.293729372937294) internal successors, (998), 315 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:54:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 998 transitions. [2021-10-13 19:54:52,387 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 998 transitions. Word has length 12 [2021-10-13 19:54:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:54:52,387 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 998 transitions. [2021-10-13 19:54:52,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2021-10-13 19:54:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 998 transitions. [2021-10-13 19:54:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:54:52,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:54:52,389 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:54:52,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 19:54:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:54:52,604 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:54:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:54:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -503593263, now seen corresponding path program 3 times [2021-10-13 19:54:52,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:54:52,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259564237] [2021-10-13 19:54:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:54:52,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:54:52,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:54:52,607 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:54:52,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 19:54:53,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:54:53,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:54:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 19:54:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:54:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:54:53,202 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:54:53,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:54:53,446 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:54:53,446 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:55:07,374 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-10-13 19:55:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 171 [2021-10-13 19:55:07,467 INFO L354 Elim1Store]: treesize reduction 7, result has 85.7 percent of original size [2021-10-13 19:55:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 220 [2021-10-13 19:55:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:55:10,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:55:13,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:13,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259564237] [2021-10-13 19:55:13,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259564237] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:13,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:13,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-13 19:55:13,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542219435] [2021-10-13 19:55:13,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:55:13,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:55:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:55:13,247 INFO L87 Difference]: Start difference. First operand 316 states and 998 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:55:17,196 INFO L93 Difference]: Finished difference Result 594 states and 1623 transitions. [2021-10-13 19:55:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:55:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:55:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:55:17,206 INFO L225 Difference]: With dead ends: 594 [2021-10-13 19:55:17,206 INFO L226 Difference]: Without dead ends: 594 [2021-10-13 19:55:17,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4677.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:55:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-10-13 19:55:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 368. [2021-10-13 19:55:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 355 states have (on average 3.3746478873239436) internal successors, (1198), 367 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1198 transitions. [2021-10-13 19:55:17,229 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1198 transitions. Word has length 12 [2021-10-13 19:55:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:55:17,229 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1198 transitions. [2021-10-13 19:55:17,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1198 transitions. [2021-10-13 19:55:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:55:17,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:55:17,231 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2021-10-13 19:55:17,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 19:55:17,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:55:17,447 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:55:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:55:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 949479713, now seen corresponding path program 1 times [2021-10-13 19:55:17,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:55:17,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545394096] [2021-10-13 19:55:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:55:17,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:55:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:55:17,450 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:55:17,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 19:55:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:55:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:55:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:55:17,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:55:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:55:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:55:23,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:55:23,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545394096] [2021-10-13 19:55:23,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545394096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:55:23,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:55:23,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-13 19:55:23,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109474911] [2021-10-13 19:55:23,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 19:55:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:55:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 19:55:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:55:23,255 INFO L87 Difference]: Start difference. First operand 368 states and 1198 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:55:31,684 WARN L207 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 113 [2021-10-13 19:55:56,598 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification that was a NOOP. DAG size: 102 [2021-10-13 19:56:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:18,482 INFO L93 Difference]: Finished difference Result 4328 states and 14426 transitions. [2021-10-13 19:56:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:56:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:56:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:18,520 INFO L225 Difference]: With dead ends: 4328 [2021-10-13 19:56:18,521 INFO L226 Difference]: Without dead ends: 4328 [2021-10-13 19:56:18,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 29540.8ms TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:56:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-10-13 19:56:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 401. [2021-10-13 19:56:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 388 states have (on average 3.2577319587628866) internal successors, (1264), 400 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1264 transitions. [2021-10-13 19:56:18,591 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1264 transitions. Word has length 12 [2021-10-13 19:56:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1264 transitions. [2021-10-13 19:56:18,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1264 transitions. [2021-10-13 19:56:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:56:18,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:18,593 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 19:56:18,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:18,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 19:56:18,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1330794122, now seen corresponding path program 2 times [2021-10-13 19:56:18,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:18,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93560619] [2021-10-13 19:56:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:56:18,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:18,811 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 19:56:18,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 19:56:19,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:56:19,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:56:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:56:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:56:19,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:56:21,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:21,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93560619] [2021-10-13 19:56:21,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93560619] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:21,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:21,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 19:56:21,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055973830] [2021-10-13 19:56:21,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:56:21,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:56:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:56:21,848 INFO L87 Difference]: Start difference. First operand 401 states and 1264 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:27,850 INFO L93 Difference]: Finished difference Result 1126 states and 3404 transitions. [2021-10-13 19:56:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 19:56:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:56:27,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:27,862 INFO L225 Difference]: With dead ends: 1126 [2021-10-13 19:56:27,862 INFO L226 Difference]: Without dead ends: 1126 [2021-10-13 19:56:27,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3762.3ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-10-13 19:56:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-10-13 19:56:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 577. [2021-10-13 19:56:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 564 states have (on average 3.702127659574468) internal successors, (2088), 576 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 2088 transitions. [2021-10-13 19:56:27,887 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 2088 transitions. Word has length 13 [2021-10-13 19:56:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 2088 transitions. [2021-10-13 19:56:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 2088 transitions. [2021-10-13 19:56:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:56:27,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:27,889 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 19:56:27,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-13 19:56:28,103 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 [2021-10-13 19:56:28,104 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1330794179, now seen corresponding path program 2 times [2021-10-13 19:56:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:28,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388087422] [2021-10-13 19:56:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:56:28,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:28,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:28,108 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) [2021-10-13 19:56:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 19:56:28,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:56:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:56:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:56:28,794 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:56:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 80 [2021-10-13 19:56:29,002 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-13 19:56:29,003 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 5 case distinctions, treesize of input 80 treesize of output 117 [2021-10-13 19:56:45,537 INFO L354 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2021-10-13 19:56:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 352 treesize of output 390 [2021-10-13 19:56:45,640 INFO L354 Elim1Store]: treesize reduction 108, result has 18.8 percent of original size [2021-10-13 19:56:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 384 treesize of output 345 [2021-10-13 19:56:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:56:49,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:56:51,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:51,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388087422] [2021-10-13 19:56:51,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388087422] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:56:51,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:56:51,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-10-13 19:56:51,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381409033] [2021-10-13 19:56:51,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:56:51,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:56:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:56:51,720 INFO L87 Difference]: Start difference. First operand 577 states and 2088 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-10-13 19:56:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:56,984 INFO L93 Difference]: Finished difference Result 943 states and 2876 transitions. [2021-10-13 19:56:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:56:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:56:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:56,993 INFO L225 Difference]: With dead ends: 943 [2021-10-13 19:56:56,993 INFO L226 Difference]: Without dead ends: 943 [2021-10-13 19:56:56,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2910.8ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:56:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-10-13 19:56:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 577. [2021-10-13 19:56:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 564 states have (on average 3.5460992907801416) internal successors, (2000), 576 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 2000 transitions. [2021-10-13 19:56:57,014 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 2000 transitions. Word has length 13 [2021-10-13 19:56:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:57,014 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 2000 transitions. [2021-10-13 19:56:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-10-13 19:56:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 2000 transitions. [2021-10-13 19:56:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:56:57,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:57,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:57,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:57,231 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 [2021-10-13 19:56:57,232 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1104725784, now seen corresponding path program 1 times [2021-10-13 19:56:57,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:57,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224002640] [2021-10-13 19:56:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:56:57,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:57,235 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) [2021-10-13 19:56:57,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 19:56:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:56:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:56:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:56:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:56:57,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:56:57,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224002640] [2021-10-13 19:56:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224002640] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 19:56:57,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:56:57,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 19:56:57,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525984411] [2021-10-13 19:56:57,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:56:57,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:56:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:56:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:56:57,779 INFO L87 Difference]: Start difference. First operand 577 states and 2000 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:56:57,887 INFO L93 Difference]: Finished difference Result 610 states and 2065 transitions. [2021-10-13 19:56:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:56:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:56:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:56:57,893 INFO L225 Difference]: With dead ends: 610 [2021-10-13 19:56:57,894 INFO L226 Difference]: Without dead ends: 592 [2021-10-13 19:56:57,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:56:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-10-13 19:56:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-10-13 19:56:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 579 states have (on average 3.454231433506045) internal successors, (2000), 591 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 2000 transitions. [2021-10-13 19:56:57,911 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 2000 transitions. Word has length 13 [2021-10-13 19:56:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:56:57,912 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 2000 transitions. [2021-10-13 19:56:57,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:56:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 2000 transitions. [2021-10-13 19:56:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:56:57,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:56:57,913 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:56:57,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 19:56:58,127 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 [2021-10-13 19:56:58,127 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:56:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:56:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1378266066, now seen corresponding path program 2 times [2021-10-13 19:56:58,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:56:58,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233534748] [2021-10-13 19:56:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:56:58,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:56:58,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:56:58,131 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) [2021-10-13 19:56:58,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-13 19:56:58,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:56:58,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:56:58,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:56:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:56:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:56:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:56:59,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:57:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:57:01,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:57:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233534748] [2021-10-13 19:57:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233534748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:57:01,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:57:01,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 19:57:01,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185359260] [2021-10-13 19:57:01,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 19:57:01,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:57:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 19:57:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:57:01,370 INFO L87 Difference]: Start difference. First operand 592 states and 2000 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:57:09,448 INFO L93 Difference]: Finished difference Result 1129 states and 3388 transitions. [2021-10-13 19:57:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 19:57:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 14 [2021-10-13 19:57:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:57:09,456 INFO L225 Difference]: With dead ends: 1129 [2021-10-13 19:57:09,456 INFO L226 Difference]: Without dead ends: 1123 [2021-10-13 19:57:09,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3373.6ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:57:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-10-13 19:57:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 720. [2021-10-13 19:57:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 709 states have (on average 3.544428772919605) internal successors, (2513), 719 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2513 transitions. [2021-10-13 19:57:09,482 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2513 transitions. Word has length 14 [2021-10-13 19:57:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:57:09,483 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2513 transitions. [2021-10-13 19:57:09,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:57:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2513 transitions. [2021-10-13 19:57:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:57:09,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:57:09,484 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 19:57:09,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-10-13 19:57:09,697 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 [2021-10-13 19:57:09,698 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:57:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:57:09,698 INFO L82 PathProgramCache]: Analyzing trace with hash 946821704, now seen corresponding path program 3 times [2021-10-13 19:57:09,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:57:09,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884312272] [2021-10-13 19:57:09,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:57:09,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:57:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:57:09,701 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) [2021-10-13 19:57:09,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 19:57:10,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 19:57:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:57:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 19:57:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:57:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:57:10,693 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 19:57:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 19:57:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:57:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:57:20,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:57:20,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884312272] [2021-10-13 19:57:20,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884312272] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:57:20,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:57:20,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:57:20,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495350894] [2021-10-13 19:57:20,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:57:20,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:57:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:57:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:57:20,664 INFO L87 Difference]: Start difference. First operand 720 states and 2513 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) [2021-10-13 19:57:37,180 WARN L207 SmtUtils]: Spent 11.06 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 19:57:50,084 WARN L207 SmtUtils]: Spent 11.51 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 19:57:58,929 WARN L207 SmtUtils]: Spent 7.39 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 19:58:34,090 WARN L207 SmtUtils]: Spent 5.53 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 19:59:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:03,897 INFO L93 Difference]: Finished difference Result 6598 states and 23721 transitions. [2021-10-13 19:59:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:59:03,899 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 [2021-10-13 19:59:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:03,928 INFO L225 Difference]: With dead ends: 6598 [2021-10-13 19:59:03,929 INFO L226 Difference]: Without dead ends: 6598 [2021-10-13 19:59:03,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 71153.6ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:59:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-10-13 19:59:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 736. [2021-10-13 19:59:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 725 states have (on average 3.510344827586207) internal successors, (2545), 735 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2545 transitions. [2021-10-13 19:59:04,014 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2545 transitions. Word has length 16 [2021-10-13 19:59:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:04,014 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2545 transitions. [2021-10-13 19:59:04,014 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) [2021-10-13 19:59:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2545 transitions. [2021-10-13 19:59:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:59:04,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:04,016 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:04,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:04,230 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 [2021-10-13 19:59:04,231 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash -658907088, now seen corresponding path program 3 times [2021-10-13 19:59:04,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:04,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439641929] [2021-10-13 19:59:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:59:04,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:04,235 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) [2021-10-13 19:59:04,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 19:59:05,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:59:05,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:59:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:59:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:05,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:59:05,283 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 [2021-10-13 19:59:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:59:05,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:59:06,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:06,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439641929] [2021-10-13 19:59:06,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439641929] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:06,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:06,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 19:59:06,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085992721] [2021-10-13 19:59:06,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:59:06,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:59:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:59:06,040 INFO L87 Difference]: Start difference. First operand 736 states and 2545 transitions. Second operand has 16 states, 16 states have (on average 1.625) 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) [2021-10-13 19:59:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:07,774 INFO L93 Difference]: Finished difference Result 1161 states and 3638 transitions. [2021-10-13 19:59:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:59:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) 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 16 [2021-10-13 19:59:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:07,780 INFO L225 Difference]: With dead ends: 1161 [2021-10-13 19:59:07,781 INFO L226 Difference]: Without dead ends: 1161 [2021-10-13 19:59:07,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 763.4ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:59:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-10-13 19:59:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 869. [2021-10-13 19:59:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.516317016317016) internal successors, (3017), 868 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3017 transitions. [2021-10-13 19:59:07,813 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3017 transitions. Word has length 16 [2021-10-13 19:59:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:07,814 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 3017 transitions. [2021-10-13 19:59:07,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) 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) [2021-10-13 19:59:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3017 transitions. [2021-10-13 19:59:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:59:07,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:07,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:07,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:08,029 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 [2021-10-13 19:59:08,030 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash 355461334, now seen corresponding path program 1 times [2021-10-13 19:59:08,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:08,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324754841] [2021-10-13 19:59:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:59:08,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:08,034 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) [2021-10-13 19:59:08,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-13 19:59:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:59:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 19:59:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:59:08,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:59:09,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:09,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324754841] [2021-10-13 19:59:09,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324754841] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:09,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:09,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 19:59:09,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402700699] [2021-10-13 19:59:09,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 19:59:09,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 19:59:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:59:09,211 INFO L87 Difference]: Start difference. First operand 869 states and 3017 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:11,268 INFO L93 Difference]: Finished difference Result 1241 states and 3885 transitions. [2021-10-13 19:59:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:59:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-10-13 19:59:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:11,275 INFO L225 Difference]: With dead ends: 1241 [2021-10-13 19:59:11,276 INFO L226 Difference]: Without dead ends: 1241 [2021-10-13 19:59:11,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:59:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-10-13 19:59:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 944. [2021-10-13 19:59:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 933 states have (on average 3.444801714898178) internal successors, (3214), 943 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3214 transitions. [2021-10-13 19:59:11,310 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3214 transitions. Word has length 16 [2021-10-13 19:59:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:11,311 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 3214 transitions. [2021-10-13 19:59:11,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3214 transitions. [2021-10-13 19:59:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:59:11,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:11,313 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:11,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:11,527 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 [2021-10-13 19:59:11,527 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1274125667, now seen corresponding path program 4 times [2021-10-13 19:59:11,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:11,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995093171] [2021-10-13 19:59:11,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:59:11,529 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:11,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:11,531 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) [2021-10-13 19:59:11,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 19:59:12,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:59:12,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:59:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 19:59:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:12,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:59:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 19:59:12,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:59:16,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:16,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995093171] [2021-10-13 19:59:16,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995093171] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:16,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-10-13 19:59:16,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713898760] [2021-10-13 19:59:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 19:59:16,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 19:59:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:59:16,531 INFO L87 Difference]: Start difference. First operand 944 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-10-13 19:59:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:26,067 INFO L93 Difference]: Finished difference Result 1421 states and 4083 transitions. [2021-10-13 19:59:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:59:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 17 [2021-10-13 19:59:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:26,076 INFO L225 Difference]: With dead ends: 1421 [2021-10-13 19:59:26,076 INFO L226 Difference]: Without dead ends: 1421 [2021-10-13 19:59:26,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6945.7ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:59:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-10-13 19:59:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 806. [2021-10-13 19:59:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 795 states have (on average 3.3245283018867924) internal successors, (2643), 805 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-10-13 19:59:26,108 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 17 [2021-10-13 19:59:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:26,109 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-10-13 19:59:26,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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) [2021-10-13 19:59:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-10-13 19:59:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:59:26,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:26,111 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:26,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:26,324 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 [2021-10-13 19:59:26,324 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1560437727, now seen corresponding path program 5 times [2021-10-13 19:59:26,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:26,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373365166] [2021-10-13 19:59:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:59:26,326 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:26,328 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) [2021-10-13 19:59:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 19:59:27,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:59:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:59:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 19:59:27,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 19:59:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 19:59:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 19:59:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 19:59:30,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 19:59:30,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373365166] [2021-10-13 19:59:30,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373365166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 19:59:30,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:59:30,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 19:59:30,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605704821] [2021-10-13 19:59:30,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:59:30,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 19:59:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:59:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:59:30,915 INFO L87 Difference]: Start difference. First operand 806 states and 2643 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) [2021-10-13 19:59:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:59:38,535 INFO L93 Difference]: Finished difference Result 1544 states and 4726 transitions. [2021-10-13 19:59:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:59:38,537 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 17 [2021-10-13 19:59:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:59:38,541 INFO L225 Difference]: With dead ends: 1544 [2021-10-13 19:59:38,542 INFO L226 Difference]: Without dead ends: 1544 [2021-10-13 19:59:38,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4481.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:59:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-10-13 19:59:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 950. [2021-10-13 19:59:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 939 states have (on average 3.526091586794462) internal successors, (3311), 949 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:59:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3311 transitions. [2021-10-13 19:59:38,574 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3311 transitions. Word has length 17 [2021-10-13 19:59:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:59:38,574 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 3311 transitions. [2021-10-13 19:59:38,574 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) [2021-10-13 19:59:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3311 transitions. [2021-10-13 19:59:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:59:38,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:59:38,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:59:38,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 19:59:38,791 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 [2021-10-13 19:59:38,791 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 28 more)] === [2021-10-13 19:59:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:59:38,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2124620841, now seen corresponding path program 1 times [2021-10-13 19:59:38,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 19:59:38,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193163650] [2021-10-13 19:59:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:59:38,793 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 19:59:38,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 19:59:38,795 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) [2021-10-13 19:59:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 19:59:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:59:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:59:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:59:39,589 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 404 treesize of output 372 [2021-10-13 20:02:22,898 WARN L207 SmtUtils]: Spent 2.70 m on a formula simplification. DAG size of input: 371 DAG size of output: 94 [2021-10-13 20:02:22,900 INFO L354 Elim1Store]: treesize reduction 1929, result has 10.4 percent of original size [2021-10-13 20:02:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 100 treesize of output 258 Received shutdown request... [2021-10-13 20:04:08,001 WARN L223 SmtUtils]: Removed 10 from assertion stack [2021-10-13 20:04:08,003 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:04:08,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 20:04:08,027 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:04:08,037 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 20:04:08,203 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 [2021-10-13 20:04:08,204 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. [2021-10-13 20:04:08,206 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 20:04:08,207 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 20:04:08,208 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 20:04:08,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2REQUIRES_VIOLATION [2021-10-13 20:04:08,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3REQUIRES_VIOLATION [2021-10-13 20:04:08,217 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 20:04:08,217 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 20:04:08,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:04:08 BasicIcfg [2021-10-13 20:04:08,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 20:04:08,220 INFO L168 Benchmark]: Toolchain (without parser) took 841153.84 ms. Allocated memory was 153.1 MB in the beginning and 234.9 MB in the end (delta: 81.8 MB). Free memory was 126.8 MB in the beginning and 129.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 79.4 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,221 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 20:04:08,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.99 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 113.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.64 ms. Allocated memory is still 153.1 MB. Free memory was 113.7 MB in the beginning and 111.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,222 INFO L168 Benchmark]: Boogie Preprocessor took 41.92 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 110.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,222 INFO L168 Benchmark]: RCFGBuilder took 1002.55 ms. Allocated memory is still 153.1 MB. Free memory was 110.1 MB in the beginning and 128.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,222 INFO L168 Benchmark]: TraceAbstraction took 839570.02 ms. Allocated memory was 153.1 MB in the beginning and 234.9 MB in the end (delta: 81.8 MB). Free memory was 127.5 MB in the beginning and 129.6 MB in the end (delta: -2.2 MB). Peak memory consumption was 79.1 MB. Max. memory is 8.0 GB. [2021-10-13 20:04:08,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 435.99 ms. Allocated memory is still 153.1 MB. Free memory was 126.6 MB in the beginning and 113.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 68.64 ms. Allocated memory is still 153.1 MB. Free memory was 113.7 MB in the beginning and 111.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.92 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 110.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1002.55 ms. Allocated memory is still 153.1 MB. Free memory was 110.1 MB in the beginning and 128.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 839570.02 ms. Allocated memory was 153.1 MB in the beginning and 234.9 MB in the end (delta: 81.8 MB). Free memory was 127.5 MB in the beginning and 129.6 MB in the end (delta: -2.2 MB). Peak memory consumption was 79.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28261.8ms, 168 PlacesBefore, 45 PlacesAfterwards, 176 TransitionsBefore, 43 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 104 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 22 TrivialYvCompositions, 10 ConcurrentYvCompositions, 10 ChoiceCompositions, 195 TotalNumberOfCompositions, 2614 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2200, positive: 2155, positive conditional: 0, positive unconditional: 2155, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1148, positive: 1137, positive conditional: 0, positive unconditional: 1137, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1148, positive: 1137, positive conditional: 0, positive unconditional: 1137, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 781, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 781, negative conditional: 0, negative unconditional: 781, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2200, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 1148, unknown conditional: 0, unknown unconditional: 1148] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 88, Positive conditional cache size: 0, Positive unconditional cache size: 88, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 79]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - TimeoutResultAtElement [Line: 80]: 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 18 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 48207ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 200 locations, 32 error locations. Started 1 CEGAR loops. OverallTime: 839346.1ms, OverallIterations: 36, TraceHistogramMax: 14, EmptinessCheckTime: 39.8ms, AutomataDifference: 299052.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28347.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 783 SDtfs, 10553 SDslu, 4162 SDs, 0 SdLazy, 13135 SolverSat, 1439 SolverUnsat, 42 SolverUnknown, 0 SolverNotchecked, 168010.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 694 GetRequests, 260 SyntacticMatches, 12 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 173552.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=950occurred in iteration=35, InterpolantAutomatonStates: 353, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 713.4ms AutomataMinimizationTime, 35 MinimizatonAttempts, 17323 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 340.7ms SsaConstructionTime, 3670.1ms SatisfiabilityAnalysisTime, 223672.2ms InterpolantComputationTime, 322 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 574 ConstructedInterpolants, 139 QuantifiedInterpolants, 17838 SizeOfPredicates, 234 NumberOfNonLiveVariables, 3232 ConjunctsInSsa, 455 ConjunctsInUnsatCore, 70 InterpolantComputations, 30 PerfectInterpolantSequences, 168/662 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