/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 ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:01:16,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:01:16,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:01:16,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:01:16,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:01:16,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:01:16,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:01:16,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:01:16,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:01:16,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:01:16,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:01:16,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:01:16,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:01:16,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:01:16,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:01:16,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:01:16,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:01:16,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:01:16,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:01:16,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:01:16,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:01:16,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:01:16,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:01:16,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:01:16,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-09 13:01:16,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:01:16,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:01:16,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:01:16,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:01:16,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:01:16,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:01:16,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:01:16,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:01:16,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:01:16,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:01:16,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:01:16,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-09 13:01:16,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:01:16,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:01:16,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:01:16,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:01:16,473 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:01:16,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:01:16,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:01:16,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:01:16,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:01:16,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:01:16,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:01:16,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:01:16,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:01:16,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:01:16,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:01:16,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:01:16,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:01:16,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:01:16,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:01:16,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:01:16,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:01:16,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:01:16,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:01:16,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-09 13:01:16,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:01:16,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:01:16,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:01:16,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 13:01:16,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-09 13:01:16,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:01:16,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:01:16,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:01:16,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:01:16,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:01:16,879 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:01:16,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-11-09 13:01:16,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2543af3da/9c304881ffe84485a899f45f17152a5d/FLAGf862c31d4 [2020-11-09 13:01:17,629 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:01:17,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-11-09 13:01:17,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2543af3da/9c304881ffe84485a899f45f17152a5d/FLAGf862c31d4 [2020-11-09 13:01:17,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2543af3da/9c304881ffe84485a899f45f17152a5d [2020-11-09 13:01:17,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:01:17,888 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:01:17,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:01:17,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:01:17,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:01:17,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:01:17" (1/1) ... [2020-11-09 13:01:17,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4207e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:17, skipping insertion in model container [2020-11-09 13:01:17,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:01:17" (1/1) ... [2020-11-09 13:01:17,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:01:17,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:01:18,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:01:18,640 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:01:18,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:01:19,001 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:01:19,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19 WrapperNode [2020-11-09 13:01:19,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:01:19,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:01:19,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:01:19,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:01:19,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:01:19,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:01:19,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:01:19,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:01:19,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... [2020-11-09 13:01:19,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:01:19,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:01:19,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:01:19,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:01:19,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:01:19,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:01:19,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:01:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-09 13:01:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:01:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-11-09 13:01:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-11-09 13:01:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-11-09 13:01:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:01:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:01:19,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:01:19,267 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:01:20,046 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:01:20,047 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-09 13:01:20,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:01:20 BoogieIcfgContainer [2020-11-09 13:01:20,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:01:20,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:01:20,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:01:20,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:01:20,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:01:17" (1/3) ... [2020-11-09 13:01:20,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1423da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:01:20, skipping insertion in model container [2020-11-09 13:01:20,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:19" (2/3) ... [2020-11-09 13:01:20,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1423da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:01:20, skipping insertion in model container [2020-11-09 13:01:20,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:01:20" (3/3) ... [2020-11-09 13:01:20,058 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-11-09 13:01:20,073 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:01:20,074 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:01:20,078 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:01:20,079 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:01:20,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,118 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,119 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,119 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,119 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,119 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,120 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,120 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,120 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,120 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,121 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,121 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,121 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,121 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,122 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,122 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,122 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,122 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,123 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,123 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,123 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,123 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,124 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,124 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,124 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,125 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,126 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,126 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,127 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,127 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,127 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,127 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,128 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,128 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,128 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,128 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,129 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,129 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,129 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,131 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,132 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,132 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,132 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,133 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,133 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,133 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,133 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,134 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:20,147 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-11-09 13:01:20,159 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-09 13:01:20,182 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:01:20,182 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:01:20,182 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-09 13:01:20,183 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:01:20,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:01:20,183 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:01:20,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:01:20,183 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:01:20,196 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-09 13:01:20,198 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 188 flow [2020-11-09 13:01:20,201 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 188 flow [2020-11-09 13:01:20,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 188 flow [2020-11-09 13:01:20,252 INFO L129 PetriNetUnfolder]: 8/89 cut-off events. [2020-11-09 13:01:20,252 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-11-09 13:01:20,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 89 events. 8/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-11-09 13:01:20,259 INFO L116 LiptonReduction]: Number of co-enabled transitions 646 [2020-11-09 13:01:21,654 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-09 13:01:22,889 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-09 13:01:23,054 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-09 13:01:23,229 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-09 13:01:23,371 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-09 13:01:24,533 WARN L194 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-11-09 13:01:24,691 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-11-09 13:01:25,045 WARN L194 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-11-09 13:01:25,258 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-11-09 13:01:26,922 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2020-11-09 13:01:27,476 WARN L194 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-09 13:01:28,669 WARN L194 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2020-11-09 13:01:29,159 WARN L194 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-09 13:01:29,166 INFO L131 LiptonReduction]: Checked pairs total: 898 [2020-11-09 13:01:29,167 INFO L133 LiptonReduction]: Total number of compositions: 92 [2020-11-09 13:01:29,177 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-11-09 13:01:29,185 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-11-09 13:01:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-09 13:01:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:01:29,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:29,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:29,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1995633590, now seen corresponding path program 1 times [2020-11-09 13:01:29,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:29,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163743488] [2020-11-09 13:01:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:01:29,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163743488] [2020-11-09 13:01:29,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:01:29,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:01:29,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432076409] [2020-11-09 13:01:29,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-09 13:01:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-09 13:01:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:01:29,499 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-11-09 13:01:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:29,533 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-11-09 13:01:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 13:01:29,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-09 13:01:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:29,544 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:01:29,544 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:01:29,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:01:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:01:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-09 13:01:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-09 13:01:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-11-09 13:01:29,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 8 [2020-11-09 13:01:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:29,595 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-11-09 13:01:29,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-09 13:01:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-11-09 13:01:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:01:29,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:29,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:29,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:01:29,598 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 902407273, now seen corresponding path program 1 times [2020-11-09 13:01:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:29,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229191773] [2020-11-09 13:01:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:01:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229191773] [2020-11-09 13:01:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138638093] [2020-11-09 13:01:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-09 13:01:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:01:29,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-09 13:01:29,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695403101] [2020-11-09 13:01:29,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-09 13:01:29,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-09 13:01:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:29,887 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 3 states. [2020-11-09 13:01:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:30,012 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2020-11-09 13:01:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 13:01:30,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-09 13:01:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:30,015 INFO L225 Difference]: With dead ends: 60 [2020-11-09 13:01:30,015 INFO L226 Difference]: Without dead ends: 60 [2020-11-09 13:01:30,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-09 13:01:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-11-09 13:01:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:01:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-11-09 13:01:30,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 12 [2020-11-09 13:01:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:30,024 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-11-09 13:01:30,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-09 13:01:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-11-09 13:01:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:01:30,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:30,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:30,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-09 13:01:30,236 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1747803613, now seen corresponding path program 1 times [2020-11-09 13:01:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:30,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364964688] [2020-11-09 13:01:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364964688] [2020-11-09 13:01:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822413809] [2020-11-09 13:01:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-09 13:01:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:30,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:30,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-09 13:01:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206726910] [2020-11-09 13:01:30,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:01:30,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:01:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:30,437 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 5 states. [2020-11-09 13:01:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:30,477 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-11-09 13:01:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:01:30,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-09 13:01:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:30,479 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:01:30,479 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:01:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:01:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-11-09 13:01:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:01:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-11-09 13:01:30,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 15 [2020-11-09 13:01:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:30,494 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-11-09 13:01:30,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:01:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-11-09 13:01:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:01:30,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:30,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:30,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:30,712 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash -572322358, now seen corresponding path program 2 times [2020-11-09 13:01:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:30,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639342041] [2020-11-09 13:01:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-09 13:01:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639342041] [2020-11-09 13:01:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320294244] [2020-11-09 13:01:30,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:30,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:01:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-09 13:01:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:30,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:30,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-09 13:01:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934907785] [2020-11-09 13:01:30,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 13:01:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 13:01:30,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-09 13:01:30,982 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 7 states. [2020-11-09 13:01:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:31,152 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-11-09 13:01:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:01:31,153 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-09 13:01:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:31,155 INFO L225 Difference]: With dead ends: 202 [2020-11-09 13:01:31,155 INFO L226 Difference]: Without dead ends: 202 [2020-11-09 13:01:31,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:01:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-09 13:01:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 139. [2020-11-09 13:01:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 13:01:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 274 transitions. [2020-11-09 13:01:31,179 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 274 transitions. Word has length 19 [2020-11-09 13:01:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:31,179 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 274 transitions. [2020-11-09 13:01:31,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 13:01:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 274 transitions. [2020-11-09 13:01:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:01:31,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:31,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:31,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:31,399 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 187263055, now seen corresponding path program 3 times [2020-11-09 13:01:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:31,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10388087] [2020-11-09 13:01:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-09 13:01:31,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10388087] [2020-11-09 13:01:31,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028904051] [2020-11-09 13:01:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:31,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:01:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-09 13:01:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:31,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:31,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-09 13:01:31,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111532544] [2020-11-09 13:01:31,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:01:31,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:01:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:01:31,658 INFO L87 Difference]: Start difference. First operand 139 states and 274 transitions. Second operand 9 states. [2020-11-09 13:01:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:31,950 INFO L93 Difference]: Finished difference Result 312 states and 620 transitions. [2020-11-09 13:01:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:01:31,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-11-09 13:01:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:31,953 INFO L225 Difference]: With dead ends: 312 [2020-11-09 13:01:31,954 INFO L226 Difference]: Without dead ends: 312 [2020-11-09 13:01:31,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-11-09 13:01:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 232. [2020-11-09 13:01:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-11-09 13:01:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 460 transitions. [2020-11-09 13:01:31,974 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 460 transitions. Word has length 26 [2020-11-09 13:01:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:31,975 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 460 transitions. [2020-11-09 13:01:31,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:01:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 460 transitions. [2020-11-09 13:01:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 13:01:31,978 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:31,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:32,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:32,193 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash -30141084, now seen corresponding path program 4 times [2020-11-09 13:01:32,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:32,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414262933] [2020-11-09 13:01:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-09 13:01:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414262933] [2020-11-09 13:01:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166878081] [2020-11-09 13:01:32,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:32,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:01:32,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-09 13:01:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-09 13:01:32,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:32,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:01:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055769163] [2020-11-09 13:01:32,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:01:32,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:01:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:01:32,444 INFO L87 Difference]: Start difference. First operand 232 states and 460 transitions. Second operand 8 states. [2020-11-09 13:01:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:32,496 INFO L93 Difference]: Finished difference Result 316 states and 628 transitions. [2020-11-09 13:01:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:01:32,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-09 13:01:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:32,499 INFO L225 Difference]: With dead ends: 316 [2020-11-09 13:01:32,500 INFO L226 Difference]: Without dead ends: 316 [2020-11-09 13:01:32,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:01:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-09 13:01:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 280. [2020-11-09 13:01:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-09 13:01:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 556 transitions. [2020-11-09 13:01:32,513 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 556 transitions. Word has length 33 [2020-11-09 13:01:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:32,513 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 556 transitions. [2020-11-09 13:01:32,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:01:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 556 transitions. [2020-11-09 13:01:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 13:01:32,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:32,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:32,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:01:32,732 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 809010193, now seen corresponding path program 5 times [2020-11-09 13:01:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428198928] [2020-11-09 13:01:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-09 13:01:32,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428198928] [2020-11-09 13:01:32,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839229806] [2020-11-09 13:01:32,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:32,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-09 13:01:32,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:32,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-09 13:01:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-09 13:01:32,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:32,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-11-09 13:01:32,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635830562] [2020-11-09 13:01:32,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:01:32,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:01:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:32,975 INFO L87 Difference]: Start difference. First operand 280 states and 556 transitions. Second operand 12 states. [2020-11-09 13:01:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:33,542 INFO L93 Difference]: Finished difference Result 514 states and 1024 transitions. [2020-11-09 13:01:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:01:33,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-11-09 13:01:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:33,547 INFO L225 Difference]: With dead ends: 514 [2020-11-09 13:01:33,547 INFO L226 Difference]: Without dead ends: 514 [2020-11-09 13:01:33,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:01:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-11-09 13:01:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 409. [2020-11-09 13:01:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-11-09 13:01:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 814 transitions. [2020-11-09 13:01:33,561 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 814 transitions. Word has length 37 [2020-11-09 13:01:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:33,580 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 814 transitions. [2020-11-09 13:01:33,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:01:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 814 transitions. [2020-11-09 13:01:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 13:01:33,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:33,588 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:33,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:33,791 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -895901208, now seen corresponding path program 6 times [2020-11-09 13:01:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:33,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620874522] [2020-11-09 13:01:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:33,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620874522] [2020-11-09 13:01:33,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828064582] [2020-11-09 13:01:33,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:34,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:01:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:01:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:34,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:34,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:01:34,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309891973] [2020-11-09 13:01:34,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:01:34,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:01:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:01:34,104 INFO L87 Difference]: Start difference. First operand 409 states and 814 transitions. Second operand 10 states. [2020-11-09 13:01:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:34,150 INFO L93 Difference]: Finished difference Result 514 states and 1024 transitions. [2020-11-09 13:01:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:01:34,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-11-09 13:01:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:34,156 INFO L225 Difference]: With dead ends: 514 [2020-11-09 13:01:34,157 INFO L226 Difference]: Without dead ends: 514 [2020-11-09 13:01:34,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:01:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-11-09 13:01:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 469. [2020-11-09 13:01:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-11-09 13:01:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 934 transitions. [2020-11-09 13:01:34,170 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 934 transitions. Word has length 44 [2020-11-09 13:01:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:34,171 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 934 transitions. [2020-11-09 13:01:34,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:01:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 934 transitions. [2020-11-09 13:01:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 13:01:34,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:34,174 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:34,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:34,388 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1982936347, now seen corresponding path program 7 times [2020-11-09 13:01:34,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:34,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351648715] [2020-11-09 13:01:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:34,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351648715] [2020-11-09 13:01:34,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776433055] [2020-11-09 13:01:34,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:34,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:01:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:34,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:34,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:01:34,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338326040] [2020-11-09 13:01:34,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:01:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:01:34,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:01:34,634 INFO L87 Difference]: Start difference. First operand 469 states and 934 transitions. Second operand 11 states. [2020-11-09 13:01:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:34,677 INFO L93 Difference]: Finished difference Result 574 states and 1144 transitions. [2020-11-09 13:01:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-09 13:01:34,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-11-09 13:01:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:34,681 INFO L225 Difference]: With dead ends: 574 [2020-11-09 13:01:34,681 INFO L226 Difference]: Without dead ends: 574 [2020-11-09 13:01:34,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:01:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-11-09 13:01:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 529. [2020-11-09 13:01:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-11-09 13:01:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1054 transitions. [2020-11-09 13:01:34,695 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1054 transitions. Word has length 48 [2020-11-09 13:01:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:34,696 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 1054 transitions. [2020-11-09 13:01:34,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:01:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1054 transitions. [2020-11-09 13:01:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-09 13:01:34,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:34,698 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:34,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-09 13:01:34,912 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1735002418, now seen corresponding path program 8 times [2020-11-09 13:01:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:34,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477002258] [2020-11-09 13:01:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477002258] [2020-11-09 13:01:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199170578] [2020-11-09 13:01:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:35,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:01:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:01:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:35,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:35,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:01:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340879992] [2020-11-09 13:01:35,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:01:35,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:01:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:35,204 INFO L87 Difference]: Start difference. First operand 529 states and 1054 transitions. Second operand 12 states. [2020-11-09 13:01:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:35,260 INFO L93 Difference]: Finished difference Result 634 states and 1264 transitions. [2020-11-09 13:01:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:01:35,260 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-11-09 13:01:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:35,266 INFO L225 Difference]: With dead ends: 634 [2020-11-09 13:01:35,266 INFO L226 Difference]: Without dead ends: 634 [2020-11-09 13:01:35,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-11-09 13:01:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 589. [2020-11-09 13:01:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-11-09 13:01:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-11-09 13:01:35,283 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 52 [2020-11-09 13:01:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:35,283 INFO L481 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-11-09 13:01:35,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:01:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-11-09 13:01:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-09 13:01:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:35,286 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:35,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:35,501 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1836275967, now seen corresponding path program 9 times [2020-11-09 13:01:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9652331] [2020-11-09 13:01:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-09 13:01:35,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9652331] [2020-11-09 13:01:35,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472699410] [2020-11-09 13:01:35,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:35,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:01:35,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-09 13:01:35,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-11-09 13:01:35,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:35,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2020-11-09 13:01:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436183302] [2020-11-09 13:01:35,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:01:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:01:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:01:35,869 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 17 states. [2020-11-09 13:01:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:37,236 INFO L93 Difference]: Finished difference Result 924 states and 1844 transitions. [2020-11-09 13:01:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 13:01:37,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-11-09 13:01:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:37,241 INFO L225 Difference]: With dead ends: 924 [2020-11-09 13:01:37,242 INFO L226 Difference]: Without dead ends: 924 [2020-11-09 13:01:37,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1386, Invalid=3036, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 13:01:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-11-09 13:01:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 778. [2020-11-09 13:01:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-09 13:01:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1552 transitions. [2020-11-09 13:01:37,263 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1552 transitions. Word has length 56 [2020-11-09 13:01:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:37,263 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1552 transitions. [2020-11-09 13:01:37,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:01:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1552 transitions. [2020-11-09 13:01:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-09 13:01:37,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:37,265 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:37,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:37,479 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1212713806, now seen corresponding path program 10 times [2020-11-09 13:01:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:37,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65773069] [2020-11-09 13:01:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-09 13:01:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65773069] [2020-11-09 13:01:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402600398] [2020-11-09 13:01:37,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:37,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:01:37,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:01:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-09 13:01:37,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:37,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:01:37,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470380316] [2020-11-09 13:01:37,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:01:37,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:01:37,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:01:37,804 INFO L87 Difference]: Start difference. First operand 778 states and 1552 transitions. Second operand 14 states. [2020-11-09 13:01:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:37,872 INFO L93 Difference]: Finished difference Result 904 states and 1804 transitions. [2020-11-09 13:01:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:01:37,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-11-09 13:01:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:37,877 INFO L225 Difference]: With dead ends: 904 [2020-11-09 13:01:37,877 INFO L226 Difference]: Without dead ends: 904 [2020-11-09 13:01:37,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:01:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-11-09 13:01:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 850. [2020-11-09 13:01:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-11-09 13:01:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1696 transitions. [2020-11-09 13:01:37,896 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1696 transitions. Word has length 63 [2020-11-09 13:01:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 1696 transitions. [2020-11-09 13:01:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:01:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1696 transitions. [2020-11-09 13:01:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-09 13:01:37,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:37,899 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:38,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 13:01:38,114 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1307134305, now seen corresponding path program 11 times [2020-11-09 13:01:38,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:38,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176495518] [2020-11-09 13:01:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-09 13:01:38,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176495518] [2020-11-09 13:01:38,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832166030] [2020-11-09 13:01:38,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:38,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-09 13:01:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:01:38,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-09 13:01:38,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:38,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:01:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288597952] [2020-11-09 13:01:38,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:01:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:01:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:01:38,480 INFO L87 Difference]: Start difference. First operand 850 states and 1696 transitions. Second operand 15 states. [2020-11-09 13:01:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:38,545 INFO L93 Difference]: Finished difference Result 976 states and 1948 transitions. [2020-11-09 13:01:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-09 13:01:38,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-11-09 13:01:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:38,552 INFO L225 Difference]: With dead ends: 976 [2020-11-09 13:01:38,552 INFO L226 Difference]: Without dead ends: 976 [2020-11-09 13:01:38,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:01:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-11-09 13:01:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 922. [2020-11-09 13:01:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 922 states. [2020-11-09 13:01:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1840 transitions. [2020-11-09 13:01:38,574 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1840 transitions. Word has length 67 [2020-11-09 13:01:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:38,575 INFO L481 AbstractCegarLoop]: Abstraction has 922 states and 1840 transitions. [2020-11-09 13:01:38,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:01:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1840 transitions. [2020-11-09 13:01:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-09 13:01:38,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:38,577 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:38,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:01:38,792 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash 100219404, now seen corresponding path program 12 times [2020-11-09 13:01:38,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:38,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167126916] [2020-11-09 13:01:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-09 13:01:38,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167126916] [2020-11-09 13:01:38,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327589683] [2020-11-09 13:01:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:39,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 13:01:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:01:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-11-09 13:01:39,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:39,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-11-09 13:01:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280488848] [2020-11-09 13:01:39,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:01:39,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:01:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:39,308 INFO L87 Difference]: Start difference. First operand 922 states and 1840 transitions. Second operand 21 states. [2020-11-09 13:01:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:41,837 INFO L93 Difference]: Finished difference Result 1338 states and 2672 transitions. [2020-11-09 13:01:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-09 13:01:41,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-11-09 13:01:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:41,844 INFO L225 Difference]: With dead ends: 1338 [2020-11-09 13:01:41,845 INFO L226 Difference]: Without dead ends: 1338 [2020-11-09 13:01:41,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2940, Invalid=6762, Unknown=0, NotChecked=0, Total=9702 [2020-11-09 13:01:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-11-09 13:01:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1159. [2020-11-09 13:01:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-11-09 13:01:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2314 transitions. [2020-11-09 13:01:41,890 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2314 transitions. Word has length 71 [2020-11-09 13:01:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:41,891 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 2314 transitions. [2020-11-09 13:01:41,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:01:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2314 transitions. [2020-11-09 13:01:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-09 13:01:41,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:41,895 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:42,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-09 13:01:42,110 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:42,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1739065011, now seen corresponding path program 13 times [2020-11-09 13:01:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:42,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778163399] [2020-11-09 13:01:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-09 13:01:42,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778163399] [2020-11-09 13:01:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686905893] [2020-11-09 13:01:42,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:01:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-09 13:01:42,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:42,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:01:42,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091389082] [2020-11-09 13:01:42,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:01:42,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:01:42,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:01:42,460 INFO L87 Difference]: Start difference. First operand 1159 states and 2314 transitions. Second operand 17 states. [2020-11-09 13:01:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:42,531 INFO L93 Difference]: Finished difference Result 1306 states and 2608 transitions. [2020-11-09 13:01:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:01:42,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-11-09 13:01:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:42,539 INFO L225 Difference]: With dead ends: 1306 [2020-11-09 13:01:42,539 INFO L226 Difference]: Without dead ends: 1306 [2020-11-09 13:01:42,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:01:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2020-11-09 13:01:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1243. [2020-11-09 13:01:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-11-09 13:01:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2482 transitions. [2020-11-09 13:01:42,572 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2482 transitions. Word has length 78 [2020-11-09 13:01:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:42,572 INFO L481 AbstractCegarLoop]: Abstraction has 1243 states and 2482 transitions. [2020-11-09 13:01:42,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:01:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2482 transitions. [2020-11-09 13:01:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-09 13:01:42,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:42,576 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:42,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:42,790 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1854341184, now seen corresponding path program 14 times [2020-11-09 13:01:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269239676] [2020-11-09 13:01:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-09 13:01:43,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269239676] [2020-11-09 13:01:43,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170194847] [2020-11-09 13:01:43,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:43,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:01:43,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:43,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:01:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-09 13:01:43,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:43,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:01:43,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107718090] [2020-11-09 13:01:43,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:01:43,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:01:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:01:43,226 INFO L87 Difference]: Start difference. First operand 1243 states and 2482 transitions. Second operand 18 states. [2020-11-09 13:01:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:43,314 INFO L93 Difference]: Finished difference Result 1390 states and 2776 transitions. [2020-11-09 13:01:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:01:43,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-11-09 13:01:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:43,324 INFO L225 Difference]: With dead ends: 1390 [2020-11-09 13:01:43,325 INFO L226 Difference]: Without dead ends: 1390 [2020-11-09 13:01:43,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:01:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2020-11-09 13:01:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1327. [2020-11-09 13:01:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2020-11-09 13:01:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 2650 transitions. [2020-11-09 13:01:43,358 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 2650 transitions. Word has length 82 [2020-11-09 13:01:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:43,359 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 2650 transitions. [2020-11-09 13:01:43,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:01:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 2650 transitions. [2020-11-09 13:01:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-09 13:01:43,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:43,363 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:43,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:01:43,577 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1828426931, now seen corresponding path program 15 times [2020-11-09 13:01:43,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:43,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747213567] [2020-11-09 13:01:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-09 13:01:43,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747213567] [2020-11-09 13:01:43,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63391952] [2020-11-09 13:01:43,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:43,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 13:01:43,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:01:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-11-09 13:01:44,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:44,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-11-09 13:01:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233374032] [2020-11-09 13:01:44,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:01:44,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:01:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:01:44,083 INFO L87 Difference]: Start difference. First operand 1327 states and 2650 transitions. Second operand 25 states. [2020-11-09 13:01:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:48,761 INFO L93 Difference]: Finished difference Result 1824 states and 3644 transitions. [2020-11-09 13:01:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-11-09 13:01:48,761 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 86 [2020-11-09 13:01:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:48,770 INFO L225 Difference]: With dead ends: 1824 [2020-11-09 13:01:48,770 INFO L226 Difference]: Without dead ends: 1824 [2020-11-09 13:01:48,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5508, Invalid=13124, Unknown=0, NotChecked=0, Total=18632 [2020-11-09 13:01:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2020-11-09 13:01:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1612. [2020-11-09 13:01:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-11-09 13:01:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 3220 transitions. [2020-11-09 13:01:48,810 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 3220 transitions. Word has length 86 [2020-11-09 13:01:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:48,810 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 3220 transitions. [2020-11-09 13:01:48,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:01:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 3220 transitions. [2020-11-09 13:01:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-09 13:01:48,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:48,815 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:49,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:01:49,029 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash -612133632, now seen corresponding path program 16 times [2020-11-09 13:01:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:49,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070233261] [2020-11-09 13:01:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-09 13:01:49,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070233261] [2020-11-09 13:01:49,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996219654] [2020-11-09 13:01:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:49,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:01:49,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:01:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-09 13:01:49,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:49,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:01:49,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330422886] [2020-11-09 13:01:49,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:01:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:01:49,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:01:49,746 INFO L87 Difference]: Start difference. First operand 1612 states and 3220 transitions. Second operand 20 states. [2020-11-09 13:01:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:49,828 INFO L93 Difference]: Finished difference Result 1780 states and 3556 transitions. [2020-11-09 13:01:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:01:49,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-11-09 13:01:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:49,839 INFO L225 Difference]: With dead ends: 1780 [2020-11-09 13:01:49,839 INFO L226 Difference]: Without dead ends: 1780 [2020-11-09 13:01:49,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:01:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2020-11-09 13:01:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1708. [2020-11-09 13:01:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1708 states. [2020-11-09 13:01:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3412 transitions. [2020-11-09 13:01:49,897 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3412 transitions. Word has length 93 [2020-11-09 13:01:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:49,898 INFO L481 AbstractCegarLoop]: Abstraction has 1708 states and 3412 transitions. [2020-11-09 13:01:49,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:01:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3412 transitions. [2020-11-09 13:01:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-09 13:01:49,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:49,903 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:50,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:01:50,117 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash 469531181, now seen corresponding path program 17 times [2020-11-09 13:01:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:50,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77642174] [2020-11-09 13:01:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-09 13:01:50,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77642174] [2020-11-09 13:01:50,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178622275] [2020-11-09 13:01:50,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:50,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-09 13:01:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:01:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-09 13:01:50,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:50,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:01:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088467933] [2020-11-09 13:01:50,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:01:50,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:01:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:50,708 INFO L87 Difference]: Start difference. First operand 1708 states and 3412 transitions. Second operand 21 states. [2020-11-09 13:01:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:50,811 INFO L93 Difference]: Finished difference Result 1876 states and 3748 transitions. [2020-11-09 13:01:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:01:50,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-11-09 13:01:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:50,822 INFO L225 Difference]: With dead ends: 1876 [2020-11-09 13:01:50,823 INFO L226 Difference]: Without dead ends: 1876 [2020-11-09 13:01:50,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2020-11-09 13:01:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1804. [2020-11-09 13:01:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1804 states. [2020-11-09 13:01:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3604 transitions. [2020-11-09 13:01:50,862 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3604 transitions. Word has length 97 [2020-11-09 13:01:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:50,863 INFO L481 AbstractCegarLoop]: Abstraction has 1804 states and 3604 transitions. [2020-11-09 13:01:50,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:01:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3604 transitions. [2020-11-09 13:01:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-09 13:01:50,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:50,867 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:51,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:51,081 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:51,082 INFO L82 PathProgramCache]: Analyzing trace with hash -34275110, now seen corresponding path program 18 times [2020-11-09 13:01:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:51,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867730] [2020-11-09 13:01:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-09 13:01:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867730] [2020-11-09 13:01:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060811026] [2020-11-09 13:01:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:51,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 13:01:51,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:01:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-11-09 13:01:51,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:51,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2020-11-09 13:01:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129499058] [2020-11-09 13:01:51,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 13:01:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 13:01:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:01:51,977 INFO L87 Difference]: Start difference. First operand 1804 states and 3604 transitions. Second operand 29 states. [2020-11-09 13:01:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:59,502 INFO L93 Difference]: Finished difference Result 2382 states and 4760 transitions. [2020-11-09 13:01:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-09 13:01:59,502 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2020-11-09 13:01:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:59,513 INFO L225 Difference]: With dead ends: 2382 [2020-11-09 13:01:59,513 INFO L226 Difference]: Without dead ends: 2382 [2020-11-09 13:01:59,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11620 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9450, Invalid=23130, Unknown=0, NotChecked=0, Total=32580 [2020-11-09 13:01:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2020-11-09 13:01:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2137. [2020-11-09 13:01:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2020-11-09 13:01:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 4270 transitions. [2020-11-09 13:01:59,580 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 4270 transitions. Word has length 101 [2020-11-09 13:01:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:59,581 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 4270 transitions. [2020-11-09 13:01:59,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 13:01:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 4270 transitions. [2020-11-09 13:01:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-09 13:01:59,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:59,586 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:59,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:59,800 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash -573051777, now seen corresponding path program 19 times [2020-11-09 13:01:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:59,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746042438] [2020-11-09 13:01:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-09 13:02:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746042438] [2020-11-09 13:02:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523323987] [2020-11-09 13:02:00,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:02:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-11-09 13:02:00,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:00,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:02:00,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213931405] [2020-11-09 13:02:00,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:02:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:02:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:00,332 INFO L87 Difference]: Start difference. First operand 2137 states and 4270 transitions. Second operand 23 states. [2020-11-09 13:02:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:00,439 INFO L93 Difference]: Finished difference Result 2245 states and 4486 transitions. [2020-11-09 13:02:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-09 13:02:00,439 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-11-09 13:02:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:00,450 INFO L225 Difference]: With dead ends: 2245 [2020-11-09 13:02:00,450 INFO L226 Difference]: Without dead ends: 2245 [2020-11-09 13:02:00,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-11-09 13:02:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-11-09 13:02:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-11-09 13:02:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 4486 transitions. [2020-11-09 13:02:00,504 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 4486 transitions. Word has length 108 [2020-11-09 13:02:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:00,506 INFO L481 AbstractCegarLoop]: Abstraction has 2245 states and 4486 transitions. [2020-11-09 13:02:00,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:02:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 4486 transitions. [2020-11-09 13:02:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-09 13:02:00,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:00,513 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:00,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 13:02:00,727 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1065588814, now seen corresponding path program 20 times [2020-11-09 13:02:00,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20246918] [2020-11-09 13:02:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:00,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20246918] [2020-11-09 13:02:00,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837536221] [2020-11-09 13:02:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:00,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:02:00,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:02:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:01,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:01,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:02:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344727166] [2020-11-09 13:02:01,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:02:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:02:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:02:01,028 INFO L87 Difference]: Start difference. First operand 2245 states and 4486 transitions. Second operand 12 states. [2020-11-09 13:02:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:01,137 INFO L93 Difference]: Finished difference Result 2660 states and 5316 transitions. [2020-11-09 13:02:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:02:01,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-11-09 13:02:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:01,158 INFO L225 Difference]: With dead ends: 2660 [2020-11-09 13:02:01,158 INFO L226 Difference]: Without dead ends: 2660 [2020-11-09 13:02:01,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:02:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2020-11-09 13:02:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2494. [2020-11-09 13:02:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2494 states. [2020-11-09 13:02:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 4984 transitions. [2020-11-09 13:02:01,222 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 4984 transitions. Word has length 112 [2020-11-09 13:02:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:01,222 INFO L481 AbstractCegarLoop]: Abstraction has 2494 states and 4984 transitions. [2020-11-09 13:02:01,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:02:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 4984 transitions. [2020-11-09 13:02:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-09 13:02:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:01,229 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:01,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:02:01,442 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:01,443 INFO L82 PathProgramCache]: Analyzing trace with hash -520033804, now seen corresponding path program 21 times [2020-11-09 13:02:01,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:01,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167318655] [2020-11-09 13:02:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167318655] [2020-11-09 13:02:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828223114] [2020-11-09 13:02:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:01,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 13:02:01,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:02:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:01,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:01,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:02:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199881975] [2020-11-09 13:02:01,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:02:01,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:02:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:02:01,890 INFO L87 Difference]: Start difference. First operand 2494 states and 4984 transitions. Second operand 13 states. [2020-11-09 13:02:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:01,968 INFO L93 Difference]: Finished difference Result 2909 states and 5814 transitions. [2020-11-09 13:02:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:02:01,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-11-09 13:02:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:01,983 INFO L225 Difference]: With dead ends: 2909 [2020-11-09 13:02:01,983 INFO L226 Difference]: Without dead ends: 2909 [2020-11-09 13:02:01,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:02:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2020-11-09 13:02:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2743. [2020-11-09 13:02:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2743 states. [2020-11-09 13:02:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 5482 transitions. [2020-11-09 13:02:02,052 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 5482 transitions. Word has length 115 [2020-11-09 13:02:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:02,053 INFO L481 AbstractCegarLoop]: Abstraction has 2743 states and 5482 transitions. [2020-11-09 13:02:02,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:02:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 5482 transitions. [2020-11-09 13:02:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-09 13:02:02,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:02,064 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:02,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:02,279 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -46978958, now seen corresponding path program 22 times [2020-11-09 13:02:02,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:02,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233478876] [2020-11-09 13:02:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233478876] [2020-11-09 13:02:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447180154] [2020-11-09 13:02:02,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:03,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:02:03,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:02:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:03,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:03,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:02:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376222688] [2020-11-09 13:02:03,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:02:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:02:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:02:03,244 INFO L87 Difference]: Start difference. First operand 2743 states and 5482 transitions. Second operand 14 states. [2020-11-09 13:02:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:03,304 INFO L93 Difference]: Finished difference Result 3158 states and 6312 transitions. [2020-11-09 13:02:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:02:03,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-11-09 13:02:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:03,313 INFO L225 Difference]: With dead ends: 3158 [2020-11-09 13:02:03,313 INFO L226 Difference]: Without dead ends: 3158 [2020-11-09 13:02:03,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:02:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2020-11-09 13:02:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 2992. [2020-11-09 13:02:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-11-09 13:02:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 5980 transitions. [2020-11-09 13:02:03,367 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 5980 transitions. Word has length 118 [2020-11-09 13:02:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:03,368 INFO L481 AbstractCegarLoop]: Abstraction has 2992 states and 5980 transitions. [2020-11-09 13:02:03,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:02:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 5980 transitions. [2020-11-09 13:02:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-09 13:02:03,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:03,375 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:03,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:02:03,589 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 942240052, now seen corresponding path program 23 times [2020-11-09 13:02:03,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:03,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615894152] [2020-11-09 13:02:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:03,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615894152] [2020-11-09 13:02:03,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923315044] [2020-11-09 13:02:03,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:04,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-09 13:02:04,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:02:04,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:04,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:04,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:02:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249475988] [2020-11-09 13:02:04,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:02:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:02:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:02:04,065 INFO L87 Difference]: Start difference. First operand 2992 states and 5980 transitions. Second operand 15 states. [2020-11-09 13:02:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:04,159 INFO L93 Difference]: Finished difference Result 3407 states and 6810 transitions. [2020-11-09 13:02:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-09 13:02:04,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-11-09 13:02:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:04,183 INFO L225 Difference]: With dead ends: 3407 [2020-11-09 13:02:04,183 INFO L226 Difference]: Without dead ends: 3407 [2020-11-09 13:02:04,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:02:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2020-11-09 13:02:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 3241. [2020-11-09 13:02:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2020-11-09 13:02:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 6478 transitions. [2020-11-09 13:02:04,243 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 6478 transitions. Word has length 121 [2020-11-09 13:02:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:04,244 INFO L481 AbstractCegarLoop]: Abstraction has 3241 states and 6478 transitions. [2020-11-09 13:02:04,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:02:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 6478 transitions. [2020-11-09 13:02:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-09 13:02:04,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:04,252 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:04,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:04,467 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1299818190, now seen corresponding path program 24 times [2020-11-09 13:02:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:04,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521726763] [2020-11-09 13:02:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:04,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521726763] [2020-11-09 13:02:04,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902928187] [2020-11-09 13:02:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:05,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-09 13:02:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:02:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:05,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:05,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:02:05,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713080189] [2020-11-09 13:02:05,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:02:05,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:02:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:02:05,324 INFO L87 Difference]: Start difference. First operand 3241 states and 6478 transitions. Second operand 16 states. [2020-11-09 13:02:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:05,431 INFO L93 Difference]: Finished difference Result 3656 states and 7308 transitions. [2020-11-09 13:02:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:02:05,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-11-09 13:02:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:05,439 INFO L225 Difference]: With dead ends: 3656 [2020-11-09 13:02:05,439 INFO L226 Difference]: Without dead ends: 3656 [2020-11-09 13:02:05,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:02:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2020-11-09 13:02:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3490. [2020-11-09 13:02:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3490 states. [2020-11-09 13:02:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 6976 transitions. [2020-11-09 13:02:05,495 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 6976 transitions. Word has length 124 [2020-11-09 13:02:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:05,495 INFO L481 AbstractCegarLoop]: Abstraction has 3490 states and 6976 transitions. [2020-11-09 13:02:05,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:02:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 6976 transitions. [2020-11-09 13:02:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-09 13:02:05,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:05,503 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:05,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:02:05,718 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash 874481780, now seen corresponding path program 25 times [2020-11-09 13:02:05,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:05,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196577476] [2020-11-09 13:02:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:05,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196577476] [2020-11-09 13:02:05,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894519065] [2020-11-09 13:02:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:06,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:02:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:06,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:02:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002254408] [2020-11-09 13:02:06,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:02:06,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:02:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:02:06,083 INFO L87 Difference]: Start difference. First operand 3490 states and 6976 transitions. Second operand 17 states. [2020-11-09 13:02:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:06,222 INFO L93 Difference]: Finished difference Result 3905 states and 7806 transitions. [2020-11-09 13:02:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:02:06,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-11-09 13:02:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:06,230 INFO L225 Difference]: With dead ends: 3905 [2020-11-09 13:02:06,230 INFO L226 Difference]: Without dead ends: 3905 [2020-11-09 13:02:06,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:02:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2020-11-09 13:02:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3739. [2020-11-09 13:02:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3739 states. [2020-11-09 13:02:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 7474 transitions. [2020-11-09 13:02:06,286 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 7474 transitions. Word has length 127 [2020-11-09 13:02:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:06,287 INFO L481 AbstractCegarLoop]: Abstraction has 3739 states and 7474 transitions. [2020-11-09 13:02:06,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:02:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 7474 transitions. [2020-11-09 13:02:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-09 13:02:06,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:06,295 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:06,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-09 13:02:06,509 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1251870222, now seen corresponding path program 26 times [2020-11-09 13:02:06,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:06,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753452043] [2020-11-09 13:02:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:06,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753452043] [2020-11-09 13:02:06,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728122496] [2020-11-09 13:02:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:06,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:02:06,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:06,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:02:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:06,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:06,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:02:06,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913685679] [2020-11-09 13:02:06,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:02:06,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:02:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:02:06,923 INFO L87 Difference]: Start difference. First operand 3739 states and 7474 transitions. Second operand 18 states. [2020-11-09 13:02:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:07,055 INFO L93 Difference]: Finished difference Result 4154 states and 8304 transitions. [2020-11-09 13:02:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:02:07,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-11-09 13:02:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:07,062 INFO L225 Difference]: With dead ends: 4154 [2020-11-09 13:02:07,062 INFO L226 Difference]: Without dead ends: 4154 [2020-11-09 13:02:07,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:02:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2020-11-09 13:02:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3988. [2020-11-09 13:02:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3988 states. [2020-11-09 13:02:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 7972 transitions. [2020-11-09 13:02:07,124 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 7972 transitions. Word has length 130 [2020-11-09 13:02:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:07,124 INFO L481 AbstractCegarLoop]: Abstraction has 3988 states and 7972 transitions. [2020-11-09 13:02:07,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:02:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 7972 transitions. [2020-11-09 13:02:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-09 13:02:07,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:07,131 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:07,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 13:02:07,345 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash -931713100, now seen corresponding path program 27 times [2020-11-09 13:02:07,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:07,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360064319] [2020-11-09 13:02:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:07,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360064319] [2020-11-09 13:02:07,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076943108] [2020-11-09 13:02:07,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:08,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 13:02:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:02:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:08,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:08,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:02:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382517067] [2020-11-09 13:02:08,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:02:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:02:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:02:08,083 INFO L87 Difference]: Start difference. First operand 3988 states and 7972 transitions. Second operand 19 states. [2020-11-09 13:02:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:08,214 INFO L93 Difference]: Finished difference Result 4403 states and 8802 transitions. [2020-11-09 13:02:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-09 13:02:08,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-11-09 13:02:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:08,222 INFO L225 Difference]: With dead ends: 4403 [2020-11-09 13:02:08,223 INFO L226 Difference]: Without dead ends: 4403 [2020-11-09 13:02:08,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:02:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2020-11-09 13:02:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 4237. [2020-11-09 13:02:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4237 states. [2020-11-09 13:02:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 8470 transitions. [2020-11-09 13:02:08,289 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 8470 transitions. Word has length 133 [2020-11-09 13:02:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:08,289 INFO L481 AbstractCegarLoop]: Abstraction has 4237 states and 8470 transitions. [2020-11-09 13:02:08,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:02:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 8470 transitions. [2020-11-09 13:02:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-09 13:02:08,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:08,298 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:08,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 13:02:08,513 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2041711282, now seen corresponding path program 28 times [2020-11-09 13:02:08,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:08,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922740545] [2020-11-09 13:02:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922740545] [2020-11-09 13:02:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126589449] [2020-11-09 13:02:08,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:09,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:02:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:02:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:09,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:09,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:02:09,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758908070] [2020-11-09 13:02:09,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:02:09,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:02:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:02:09,949 INFO L87 Difference]: Start difference. First operand 4237 states and 8470 transitions. Second operand 20 states. [2020-11-09 13:02:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:10,054 INFO L93 Difference]: Finished difference Result 4652 states and 9300 transitions. [2020-11-09 13:02:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:02:10,054 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-11-09 13:02:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:10,059 INFO L225 Difference]: With dead ends: 4652 [2020-11-09 13:02:10,059 INFO L226 Difference]: Without dead ends: 4652 [2020-11-09 13:02:10,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:02:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2020-11-09 13:02:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 4486. [2020-11-09 13:02:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4486 states. [2020-11-09 13:02:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8968 transitions. [2020-11-09 13:02:10,127 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8968 transitions. Word has length 136 [2020-11-09 13:02:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:10,127 INFO L481 AbstractCegarLoop]: Abstraction has 4486 states and 8968 transitions. [2020-11-09 13:02:10,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:02:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8968 transitions. [2020-11-09 13:02:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-09 13:02:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:10,137 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:10,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:10,352 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -373004556, now seen corresponding path program 29 times [2020-11-09 13:02:10,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:10,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494151476] [2020-11-09 13:02:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:10,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494151476] [2020-11-09 13:02:10,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796827150] [2020-11-09 13:02:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:10,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-09 13:02:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:02:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:11,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:11,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:02:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969481710] [2020-11-09 13:02:11,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:02:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:02:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:02:11,009 INFO L87 Difference]: Start difference. First operand 4486 states and 8968 transitions. Second operand 21 states. [2020-11-09 13:02:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:11,117 INFO L93 Difference]: Finished difference Result 4901 states and 9798 transitions. [2020-11-09 13:02:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:02:11,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-11-09 13:02:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:11,126 INFO L225 Difference]: With dead ends: 4901 [2020-11-09 13:02:11,126 INFO L226 Difference]: Without dead ends: 4901 [2020-11-09 13:02:11,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:02:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2020-11-09 13:02:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 4735. [2020-11-09 13:02:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4735 states. [2020-11-09 13:02:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 9466 transitions. [2020-11-09 13:02:11,201 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 9466 transitions. Word has length 139 [2020-11-09 13:02:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:11,202 INFO L481 AbstractCegarLoop]: Abstraction has 4735 states and 9466 transitions. [2020-11-09 13:02:11,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:02:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 9466 transitions. [2020-11-09 13:02:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-09 13:02:11,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:11,211 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:11,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:11,425 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash -765293710, now seen corresponding path program 30 times [2020-11-09 13:02:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:11,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178932467] [2020-11-09 13:02:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:11,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178932467] [2020-11-09 13:02:11,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177000174] [2020-11-09 13:02:11,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:12,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-09 13:02:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:02:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:12,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:12,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:02:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172223982] [2020-11-09 13:02:12,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:02:12,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:02:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:02:12,613 INFO L87 Difference]: Start difference. First operand 4735 states and 9466 transitions. Second operand 22 states. [2020-11-09 13:02:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:12,792 INFO L93 Difference]: Finished difference Result 5150 states and 10296 transitions. [2020-11-09 13:02:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:02:12,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-11-09 13:02:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:12,798 INFO L225 Difference]: With dead ends: 5150 [2020-11-09 13:02:12,798 INFO L226 Difference]: Without dead ends: 5150 [2020-11-09 13:02:12,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:02:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2020-11-09 13:02:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4984. [2020-11-09 13:02:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2020-11-09 13:02:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 9964 transitions. [2020-11-09 13:02:12,874 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 9964 transitions. Word has length 142 [2020-11-09 13:02:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:12,875 INFO L481 AbstractCegarLoop]: Abstraction has 4984 states and 9964 transitions. [2020-11-09 13:02:12,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:02:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 9964 transitions. [2020-11-09 13:02:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-09 13:02:12,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:12,889 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:13,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:13,102 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -845468108, now seen corresponding path program 31 times [2020-11-09 13:02:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:13,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564318433] [2020-11-09 13:02:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564318433] [2020-11-09 13:02:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227397404] [2020-11-09 13:02:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:02:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-11-09 13:02:13,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:13,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:02:13,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256866571] [2020-11-09 13:02:13,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:02:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:02:13,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:13,611 INFO L87 Difference]: Start difference. First operand 4984 states and 9964 transitions. Second operand 23 states. [2020-11-09 13:02:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:13,749 INFO L93 Difference]: Finished difference Result 5233 states and 10462 transitions. [2020-11-09 13:02:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-09 13:02:13,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-11-09 13:02:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:13,754 INFO L225 Difference]: With dead ends: 5233 [2020-11-09 13:02:13,754 INFO L226 Difference]: Without dead ends: 5233 [2020-11-09 13:02:13,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2020-11-09 13:02:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2020-11-09 13:02:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5233 states. [2020-11-09 13:02:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 10462 transitions. [2020-11-09 13:02:13,828 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 10462 transitions. Word has length 145 [2020-11-09 13:02:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:13,829 INFO L481 AbstractCegarLoop]: Abstraction has 5233 states and 10462 transitions. [2020-11-09 13:02:13,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:02:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 10462 transitions. [2020-11-09 13:02:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-09 13:02:13,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:13,839 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:14,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-09 13:02:14,054 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1319142350, now seen corresponding path program 32 times [2020-11-09 13:02:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:14,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035569192] [2020-11-09 13:02:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:02:17,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035569192] [2020-11-09 13:02:17,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439945187] [2020-11-09 13:02:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:17,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:02:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 123 conjunts are in the unsatisfiable core [2020-11-09 13:02:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:02:17,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:17,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-11-09 13:02:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292162968] [2020-11-09 13:02:17,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-09 13:02:17,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-09 13:02:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:02:17,614 INFO L87 Difference]: Start difference. First operand 5233 states and 10462 transitions. Second operand 63 states. [2020-11-09 13:04:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:04:15,198 INFO L93 Difference]: Finished difference Result 370338 states and 740629 transitions. [2020-11-09 13:04:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 693 states. [2020-11-09 13:04:15,199 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-11-09 13:04:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:04:15,977 INFO L225 Difference]: With dead ends: 370338 [2020-11-09 13:04:15,977 INFO L226 Difference]: Without dead ends: 370336 [2020-11-09 13:04:16,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 691 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198135 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=2643, Invalid=476913, Unknown=0, NotChecked=0, Total=479556 [2020-11-09 13:04:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370336 states. [2020-11-09 13:04:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370336 to 11740. [2020-11-09 13:04:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11740 states. [2020-11-09 13:04:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11740 states to 11740 states and 23673 transitions. [2020-11-09 13:04:17,742 INFO L78 Accepts]: Start accepts. Automaton has 11740 states and 23673 transitions. Word has length 148 [2020-11-09 13:04:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:04:17,743 INFO L481 AbstractCegarLoop]: Abstraction has 11740 states and 23673 transitions. [2020-11-09 13:04:17,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-09 13:04:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11740 states and 23673 transitions. [2020-11-09 13:04:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-09 13:04:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:04:17,758 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:04:17,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:04:17,974 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:04:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:04:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 916527342, now seen corresponding path program 33 times [2020-11-09 13:04:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:04:17,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519286069] [2020-11-09 13:04:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:04:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:04:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2020-11-09 13:04:18,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519286069] [2020-11-09 13:04:18,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:04:18,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:04:18,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378362033] [2020-11-09 13:04:18,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-09 13:04:18,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:04:18,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-09 13:04:18,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:04:18,180 INFO L87 Difference]: Start difference. First operand 11740 states and 23673 transitions. Second operand 3 states. [2020-11-09 13:04:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:04:18,239 INFO L93 Difference]: Finished difference Result 2905 states and 3722 transitions. [2020-11-09 13:04:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 13:04:18,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-11-09 13:04:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:04:18,244 INFO L225 Difference]: With dead ends: 2905 [2020-11-09 13:04:18,244 INFO L226 Difference]: Without dead ends: 2905 [2020-11-09 13:04:18,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:04:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2020-11-09 13:04:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2905. [2020-11-09 13:04:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2905 states. [2020-11-09 13:04:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 3722 transitions. [2020-11-09 13:04:18,279 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 3722 transitions. Word has length 148 [2020-11-09 13:04:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:04:18,279 INFO L481 AbstractCegarLoop]: Abstraction has 2905 states and 3722 transitions. [2020-11-09 13:04:18,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-09 13:04:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 3722 transitions. [2020-11-09 13:04:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-09 13:04:18,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:04:18,284 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:04:18,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-09 13:04:18,284 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:04:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:04:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 464144836, now seen corresponding path program 34 times [2020-11-09 13:04:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:04:18,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870152690] [2020-11-09 13:04:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:04:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:04:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:04:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870152690] [2020-11-09 13:04:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590741720] [2020-11-09 13:04:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:04:23,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:04:23,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:04:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 123 conjunts are in the unsatisfiable core [2020-11-09 13:04:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:04:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:04:23,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:04:23,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-11-09 13:04:23,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138302690] [2020-11-09 13:04:23,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-09 13:04:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:04:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-09 13:04:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:04:23,655 INFO L87 Difference]: Start difference. First operand 2905 states and 3722 transitions. Second operand 63 states. Received shutdown request... [2020-11-09 13:05:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 397 states. [2020-11-09 13:05:12,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 13:05:12,576 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 13:05:12,580 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 13:05:12,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:05:12 BasicIcfg [2020-11-09 13:05:12,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:05:12,581 INFO L168 Benchmark]: Toolchain (without parser) took 234698.67 ms. Allocated memory was 152.0 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 124.6 MB in the beginning and 325.6 MB in the end (delta: -200.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,582 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory was 123.8 MB in the beginning and 123.7 MB in the end (delta: 89.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:05:12,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1112.82 ms. Allocated memory is still 152.0 MB. Free memory was 124.0 MB in the beginning and 74.1 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.7 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.72 ms. Allocated memory is still 152.0 MB. Free memory was 74.1 MB in the beginning and 71.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,583 INFO L168 Benchmark]: Boogie Preprocessor took 63.55 ms. Allocated memory is still 152.0 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,583 INFO L168 Benchmark]: RCFGBuilder took 877.73 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 70.4 MB in the beginning and 157.4 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,584 INFO L168 Benchmark]: TraceAbstraction took 232529.65 ms. Allocated memory was 182.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 156.9 MB in the beginning and 325.6 MB in the end (delta: -168.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2020-11-09 13:05:12,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory was 123.8 MB in the beginning and 123.7 MB in the end (delta: 89.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 1112.82 ms. Allocated memory is still 152.0 MB. Free memory was 124.0 MB in the beginning and 74.1 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 96.72 ms. Allocated memory is still 152.0 MB. Free memory was 74.1 MB in the beginning and 71.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.55 ms. Allocated memory is still 152.0 MB. Free memory was 71.4 MB in the beginning and 70.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 877.73 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 70.4 MB in the beginning and 157.4 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 232529.65 ms. Allocated memory was 182.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 156.9 MB in the beginning and 325.6 MB in the end (delta: -168.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 421 VarBasedMoverChecksPositive, 24 VarBasedMoverChecksNegative, 5 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 34 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 8.9s, 86 PlacesBefore, 19 PlacesAfterwards, 90 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 49 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 92 TotalNumberOfCompositions, 898 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (2905states) and FLOYD_HOARE automaton (currently 397 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 429 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 232.3s, OverallIterations: 36, TraceHistogramMax: 20, AutomataDifference: 186.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.0s, HoareTripleCheckerStatistics: 5331 SDtfs, 14012 SDslu, 280703 SDs, 0 SdLazy, 166979 SolverSat, 3101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5433 GetRequests, 3429 SyntacticMatches, 4 SemanticMatches, 1999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288134 ImplicationChecksByTransitivity, 79.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11740occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 35 MinimizatonAttempts, 362048 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 6208 NumberOfCodeBlocks, 6060 NumberOfCodeBlocksAsserted, 261 NumberOfCheckSat, 6138 ConstructedInterpolants, 0 QuantifiedInterpolants, 1652426 SizeOfPredicates, 112 NumberOfNonLiveVariables, 11720 ConjunctsInSsa, 627 ConjunctsInUnsatCore, 70 InterpolantComputations, 3 PerfectInterpolantSequences, 22813/43258 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