/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:20:54,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:20:54,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:20:54,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:20:54,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:20:54,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:20:54,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:20:54,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:20:54,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:20:54,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:20:54,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:20:54,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:20:54,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:20:54,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:20:54,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:20:54,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:20:54,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:20:54,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:20:54,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:20:54,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:20:54,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:20:54,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:20:54,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:20:54,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:20:54,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 12:20:54,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:20:54,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:20:54,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:20:54,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:20:54,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:20:54,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:20:54,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:20:54,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:20:54,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:20:54,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:20:54,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:20:54,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 12:20:54,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:20:54,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:20:54,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:20:54,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:20:54,749 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:20:54,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:20:54,750 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:20:54,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:20:54,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:20:54,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:20:54,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:20:54,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:20:54,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:20:54,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:20:54,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:20:54,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:20:54,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:20:54,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:20:54,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:20:54,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:20:54,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:20:54,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:20:54,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:20:54,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:20:54,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:20:54,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:20:54,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:20:54,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:20:54,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:20:55,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:20:55,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:20:55,086 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:20:55,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:20:55,088 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:20:55,088 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 12:20:55,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5cb75416/d280570375bf4412bdf744d0a8da7368/FLAGe749ecbfa [2020-10-16 12:20:55,598 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:20:55,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 12:20:55,600 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 12:20:55,600 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 12:20:55,600 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 12:20:55,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5cb75416/d280570375bf4412bdf744d0a8da7368/FLAGe749ecbfa [2020-10-16 12:20:55,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5cb75416/d280570375bf4412bdf744d0a8da7368 [2020-10-16 12:20:55,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:20:55,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:20:55,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:20:55,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:20:55,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:20:55,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:20:55" (1/1) ... [2020-10-16 12:20:55,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d9e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:55, skipping insertion in model container [2020-10-16 12:20:55,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:20:55" (1/1) ... [2020-10-16 12:20:56,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:20:56,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:20:56,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:20:56,226 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:20:56,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:20:56,345 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:20:56,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56 WrapperNode [2020-10-16 12:20:56,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:20:56,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:20:56,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:20:56,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:20:56,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:20:56,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:20:56,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:20:56,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:20:56,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... [2020-10-16 12:20:56,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:20:56,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:20:56,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:20:56,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:20:56,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:20:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:20:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:20:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:20:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 12:20:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-16 12:20:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-16 12:20:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-16 12:20:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-16 12:20:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:20:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:20:56,507 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:20:56,819 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:20:56,820 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 12:20:56,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:20:56 BoogieIcfgContainer [2020-10-16 12:20:56,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:20:56,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:20:56,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:20:56,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:20:56,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:20:55" (1/3) ... [2020-10-16 12:20:56,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cbe1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:20:56, skipping insertion in model container [2020-10-16 12:20:56,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:20:56" (2/3) ... [2020-10-16 12:20:56,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cbe1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:20:56, skipping insertion in model container [2020-10-16 12:20:56,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:20:56" (3/3) ... [2020-10-16 12:20:56,848 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-16 12:20:56,863 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:20:56,864 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:20:56,872 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:20:56,873 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:20:56,906 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,907 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,907 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,907 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,908 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,908 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,908 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,908 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,909 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,909 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,909 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,910 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,910 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,910 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,910 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,911 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,911 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,911 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,911 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,912 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,912 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,912 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,916 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,916 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,916 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,917 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,917 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,922 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,922 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,923 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,923 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,923 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:20:56,931 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 12:20:56,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 12:20:56,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:20:56,970 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:20:56,970 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:20:56,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:20:56,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:20:56,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:20:56,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:20:56,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:20:56,985 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:20:56,986 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 12:20:56,989 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 12:20:56,992 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-16 12:20:57,049 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-16 12:20:57,050 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 12:20:57,055 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-16 12:20:57,057 INFO L117 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-16 12:20:57,782 INFO L132 LiptonReduction]: Checked pairs total: 866 [2020-10-16 12:20:57,782 INFO L134 LiptonReduction]: Total number of compositions: 34 [2020-10-16 12:20:57,790 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-16 12:20:57,804 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-16 12:20:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-16 12:20:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:20:57,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:57,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:57,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-16 12:20:57,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:57,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824440410] [2020-10-16 12:20:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:20:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:20:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824440410] [2020-10-16 12:20:58,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:20:58,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:20:58,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728511193] [2020-10-16 12:20:58,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:20:58,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:20:58,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:20:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:20:58,044 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-10-16 12:20:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:20:58,086 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-10-16 12:20:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:20:58,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-16 12:20:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:20:58,102 INFO L225 Difference]: With dead ends: 96 [2020-10-16 12:20:58,103 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 12:20:58,104 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 [2020-10-16 12:20:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 12:20:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-16 12:20:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 12:20:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-10-16 12:20:58,156 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-10-16 12:20:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:20:58,156 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-10-16 12:20:58,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:20:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-10-16 12:20:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:20:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:58,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:58,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:20:58,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-10-16 12:20:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105350469] [2020-10-16 12:20:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:20:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:20:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105350469] [2020-10-16 12:20:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988593540] [2020-10-16 12:20:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:20:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:58,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-16 12:20:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:20:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:20:58,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:20:58,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-16 12:20:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021763048] [2020-10-16 12:20:58,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:20:58,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:20:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:20:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:20:58,298 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 3 states. [2020-10-16 12:20:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:20:58,316 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2020-10-16 12:20:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:20:58,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-16 12:20:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:20:58,319 INFO L225 Difference]: With dead ends: 108 [2020-10-16 12:20:58,319 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 12:20:58,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:20:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 12:20:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-16 12:20:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 12:20:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 211 transitions. [2020-10-16 12:20:58,332 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 211 transitions. Word has length 17 [2020-10-16 12:20:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:20:58,332 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 211 transitions. [2020-10-16 12:20:58,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:20:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 211 transitions. [2020-10-16 12:20:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:20:58,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:58,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:58,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 12:20:58,550 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1653958726, now seen corresponding path program 1 times [2020-10-16 12:20:58,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:58,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072400968] [2020-10-16 12:20:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:20:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:20:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072400968] [2020-10-16 12:20:58,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241106634] [2020-10-16 12:20:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:20:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 12:20:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:20:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:20:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:20:58,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 12:20:58,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038801151] [2020-10-16 12:20:58,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:20:58,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:20:58,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:20:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:20:58,710 INFO L87 Difference]: Start difference. First operand 95 states and 211 transitions. Second operand 6 states. [2020-10-16 12:20:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:20:58,818 INFO L93 Difference]: Finished difference Result 197 states and 454 transitions. [2020-10-16 12:20:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 12:20:58,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-16 12:20:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:20:58,821 INFO L225 Difference]: With dead ends: 197 [2020-10-16 12:20:58,821 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 12:20:58,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-16 12:20:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 12:20:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-10-16 12:20:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 12:20:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-16 12:20:58,836 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 19 [2020-10-16 12:20:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:20:58,837 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-16 12:20:58,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:20:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-16 12:20:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:20:58,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:58,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:59,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:20:59,051 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:59,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-16 12:20:59,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:59,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151710536] [2020-10-16 12:20:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:20:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:20:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151710536] [2020-10-16 12:20:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638526741] [2020-10-16 12:20:59,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:20:59,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:20:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:20:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:20:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:20:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:20:59,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:20:59,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 12:20:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144745607] [2020-10-16 12:20:59,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:20:59,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:20:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:20:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:20:59,251 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 6 states. [2020-10-16 12:20:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:20:59,290 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-16 12:20:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:20:59,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-16 12:20:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:20:59,293 INFO L225 Difference]: With dead ends: 210 [2020-10-16 12:20:59,293 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 12:20:59,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:20:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 12:20:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-16 12:20:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-16 12:20:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-16 12:20:59,329 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-16 12:20:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:20:59,329 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-16 12:20:59,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:20:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-16 12:20:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:20:59,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:59,334 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:59,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:20:59,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-16 12:20:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:59,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044233552] [2020-10-16 12:20:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:20:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:20:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:20:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044233552] [2020-10-16 12:20:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234163226] [2020-10-16 12:20:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:20:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 12:20:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:20:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:20:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:20:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:20:59,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:20:59,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 12:20:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855278308] [2020-10-16 12:20:59,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:20:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:20:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:20:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:20:59,721 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 7 states. [2020-10-16 12:20:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:20:59,752 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-16 12:20:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:20:59,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-16 12:20:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:20:59,755 INFO L225 Difference]: With dead ends: 244 [2020-10-16 12:20:59,755 INFO L226 Difference]: Without dead ends: 244 [2020-10-16 12:20:59,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:20:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-16 12:20:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-16 12:20:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-16 12:20:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-16 12:20:59,766 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-16 12:20:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:20:59,766 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-16 12:20:59,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:20:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-16 12:20:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 12:20:59,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:20:59,769 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:20:59,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:20:59,983 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:20:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:20:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-16 12:20:59,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:20:59,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386505561] [2020-10-16 12:20:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386505561] [2020-10-16 12:21:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360595734] [2020-10-16 12:21:00,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:00,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:21:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:21:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:00,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 12:21:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818870730] [2020-10-16 12:21:00,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:21:00,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:21:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:21:00,122 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 8 states. [2020-10-16 12:21:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:00,155 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-16 12:21:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:21:00,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-16 12:21:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:00,157 INFO L225 Difference]: With dead ends: 261 [2020-10-16 12:21:00,158 INFO L226 Difference]: Without dead ends: 261 [2020-10-16 12:21:00,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:21:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-16 12:21:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-16 12:21:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-16 12:21:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-16 12:21:00,168 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-16 12:21:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:00,169 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-16 12:21:00,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:21:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-16 12:21:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 12:21:00,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:00,171 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:00,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 12:21:00,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:00,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-16 12:21:00,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:00,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934952251] [2020-10-16 12:21:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:00,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934952251] [2020-10-16 12:21:00,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892671366] [2020-10-16 12:21:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:00,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 12:21:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 12:21:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:00,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:00,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 12:21:00,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372107407] [2020-10-16 12:21:00,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 12:21:00,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 12:21:00,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:21:00,553 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 6 states. [2020-10-16 12:21:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:00,579 INFO L93 Difference]: Finished difference Result 354 states and 834 transitions. [2020-10-16 12:21:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 12:21:00,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 12:21:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:00,583 INFO L225 Difference]: With dead ends: 354 [2020-10-16 12:21:00,583 INFO L226 Difference]: Without dead ends: 354 [2020-10-16 12:21:00,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 12:21:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-16 12:21:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2020-10-16 12:21:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-16 12:21:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 759 transitions. [2020-10-16 12:21:00,593 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 759 transitions. Word has length 29 [2020-10-16 12:21:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:00,594 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 759 transitions. [2020-10-16 12:21:00,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 12:21:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 759 transitions. [2020-10-16 12:21:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 12:21:00,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:00,596 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:00,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:00,810 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash 827854074, now seen corresponding path program 6 times [2020-10-16 12:21:00,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:00,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927772200] [2020-10-16 12:21:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927772200] [2020-10-16 12:21:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766865217] [2020-10-16 12:21:00,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:00,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 12:21:00,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 12:21:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:01,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:01,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 12:21:01,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889203587] [2020-10-16 12:21:01,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 12:21:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 12:21:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:21:01,015 INFO L87 Difference]: Start difference. First operand 323 states and 759 transitions. Second operand 7 states. [2020-10-16 12:21:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:01,042 INFO L93 Difference]: Finished difference Result 416 states and 984 transitions. [2020-10-16 12:21:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 12:21:01,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-16 12:21:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:01,046 INFO L225 Difference]: With dead ends: 416 [2020-10-16 12:21:01,046 INFO L226 Difference]: Without dead ends: 416 [2020-10-16 12:21:01,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 12:21:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-16 12:21:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 385. [2020-10-16 12:21:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-16 12:21:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 909 transitions. [2020-10-16 12:21:01,058 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 909 transitions. Word has length 31 [2020-10-16 12:21:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:01,059 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 909 transitions. [2020-10-16 12:21:01,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 12:21:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 909 transitions. [2020-10-16 12:21:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 12:21:01,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:01,061 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:01,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:01,277 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 7 times [2020-10-16 12:21:01,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:01,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317476057] [2020-10-16 12:21:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:01,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317476057] [2020-10-16 12:21:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346491304] [2020-10-16 12:21:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 12:21:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 12:21:01,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:01,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 12:21:01,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481701609] [2020-10-16 12:21:01,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 12:21:01,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:01,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 12:21:01,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 12:21:01,436 INFO L87 Difference]: Start difference. First operand 385 states and 909 transitions. Second operand 8 states. [2020-10-16 12:21:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:01,469 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-16 12:21:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:21:01,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-16 12:21:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:01,479 INFO L225 Difference]: With dead ends: 447 [2020-10-16 12:21:01,479 INFO L226 Difference]: Without dead ends: 447 [2020-10-16 12:21:01,479 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 [2020-10-16 12:21:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-16 12:21:01,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-16 12:21:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-16 12:21:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-16 12:21:01,497 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-10-16 12:21:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:01,498 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-16 12:21:01,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 12:21:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-16 12:21:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:01,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:01,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:01,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 12:21:01,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 8 times [2020-10-16 12:21:01,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:01,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317985008] [2020-10-16 12:21:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:02,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317985008] [2020-10-16 12:21:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533056879] [2020-10-16 12:21:02,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:02,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:21:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 12:21:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:02,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 12:21:02,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-16 12:21:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918756266] [2020-10-16 12:21:02,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:02,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:02,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-16 12:21:02,129 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-16 12:21:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:02,943 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-16 12:21:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:21:02,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:02,949 INFO L225 Difference]: With dead ends: 1728 [2020-10-16 12:21:02,949 INFO L226 Difference]: Without dead ends: 876 [2020-10-16 12:21:02,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:21:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-16 12:21:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-16 12:21:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-16 12:21:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-16 12:21:02,971 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-16 12:21:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:02,971 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-16 12:21:02,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-16 12:21:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:02,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:02,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:03,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:03,189 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 9 times [2020-10-16 12:21:03,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:03,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146954229] [2020-10-16 12:21:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:03,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146954229] [2020-10-16 12:21:03,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525577009] [2020-10-16 12:21:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:03,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:21:03,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:03,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190747705] [2020-10-16 12:21:03,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:03,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:03,605 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-10-16 12:21:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:04,288 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-16 12:21:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:21:04,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:04,295 INFO L225 Difference]: With dead ends: 1731 [2020-10-16 12:21:04,295 INFO L226 Difference]: Without dead ends: 816 [2020-10-16 12:21:04,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:21:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-16 12:21:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-16 12:21:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-16 12:21:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-16 12:21:04,317 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-16 12:21:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:04,318 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-16 12:21:04,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-16 12:21:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:04,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:04,320 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:04,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:04,536 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 10 times [2020-10-16 12:21:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:04,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21155079] [2020-10-16 12:21:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21155079] [2020-10-16 12:21:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486640803] [2020-10-16 12:21:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:04,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:21:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:04,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:04,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:04,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758304730] [2020-10-16 12:21:04,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:04,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:04,885 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-10-16 12:21:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:05,519 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-16 12:21:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:21:05,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:05,526 INFO L225 Difference]: With dead ends: 2131 [2020-10-16 12:21:05,526 INFO L226 Difference]: Without dead ends: 792 [2020-10-16 12:21:05,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:21:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-16 12:21:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-16 12:21:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-16 12:21:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-16 12:21:05,544 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-16 12:21:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:05,544 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-16 12:21:05,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-16 12:21:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:05,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:05,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:05,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 12:21:05,761 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 11 times [2020-10-16 12:21:05,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:05,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196451501] [2020-10-16 12:21:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196451501] [2020-10-16 12:21:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103444202] [2020-10-16 12:21:06,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:06,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 12:21:06,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:06,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:06,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555239519] [2020-10-16 12:21:06,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:06,159 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-10-16 12:21:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:06,760 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-16 12:21:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:21:06,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:06,765 INFO L225 Difference]: With dead ends: 2670 [2020-10-16 12:21:06,765 INFO L226 Difference]: Without dead ends: 768 [2020-10-16 12:21:06,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:21:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-16 12:21:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-16 12:21:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-16 12:21:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-16 12:21:06,781 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-16 12:21:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:06,782 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-16 12:21:06,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-16 12:21:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:06,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:06,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 12:21:06,997 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 12 times [2020-10-16 12:21:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:06,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800769348] [2020-10-16 12:21:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800769348] [2020-10-16 12:21:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311355534] [2020-10-16 12:21:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:07,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 12:21:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:07,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:07,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:07,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83042268] [2020-10-16 12:21:07,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:07,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:07,379 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-10-16 12:21:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:08,272 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-10-16 12:21:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 12:21:08,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:08,287 INFO L225 Difference]: With dead ends: 3250 [2020-10-16 12:21:08,287 INFO L226 Difference]: Without dead ends: 2437 [2020-10-16 12:21:08,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:21:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-16 12:21:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-10-16 12:21:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-16 12:21:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-10-16 12:21:08,335 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-10-16 12:21:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:08,335 INFO L481 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-10-16 12:21:08,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-10-16 12:21:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:08,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:08,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:08,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 12:21:08,554 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 13 times [2020-10-16 12:21:08,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:08,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999299719] [2020-10-16 12:21:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:21:08,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999299719] [2020-10-16 12:21:08,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132606270] [2020-10-16 12:21:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:21:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:21:08,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:08,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 12:21:08,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436107480] [2020-10-16 12:21:08,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:21:08,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:21:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:21:08,858 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-10-16 12:21:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:09,590 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-10-16 12:21:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:21:09,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 12:21:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:09,602 INFO L225 Difference]: With dead ends: 2721 [2020-10-16 12:21:09,602 INFO L226 Difference]: Without dead ends: 2040 [2020-10-16 12:21:09,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=690, Invalid=1860, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:21:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-10-16 12:21:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-10-16 12:21:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-16 12:21:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-10-16 12:21:09,639 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-10-16 12:21:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:09,639 INFO L481 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-10-16 12:21:09,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:21:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-10-16 12:21:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:09,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:09,642 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:09,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:09,857 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 14 times [2020-10-16 12:21:09,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:09,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085115955] [2020-10-16 12:21:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085115955] [2020-10-16 12:21:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531804577] [2020-10-16 12:21:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:10,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:21:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:21:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:10,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:10,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-16 12:21:10,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468091122] [2020-10-16 12:21:10,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:21:10,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:21:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:21:10,084 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-10-16 12:21:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:10,684 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-10-16 12:21:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 12:21:10,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 12:21:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:10,693 INFO L225 Difference]: With dead ends: 2550 [2020-10-16 12:21:10,693 INFO L226 Difference]: Without dead ends: 1781 [2020-10-16 12:21:10,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:21:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-16 12:21:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-10-16 12:21:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-10-16 12:21:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-10-16 12:21:10,721 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-10-16 12:21:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:10,721 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-10-16 12:21:10,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:21:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-10-16 12:21:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:10,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:10,725 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 12:21:10,939 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 15 times [2020-10-16 12:21:10,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:10,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202373398] [2020-10-16 12:21:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 12:21:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202373398] [2020-10-16 12:21:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308805034] [2020-10-16 12:21:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:11,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 12:21:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:21:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 12:21:11,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:11,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 12:21:11,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409323344] [2020-10-16 12:21:11,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:21:11,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:11,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:21:11,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:21:11,164 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-10-16 12:21:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:11,638 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-10-16 12:21:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 12:21:11,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-16 12:21:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:11,647 INFO L225 Difference]: With dead ends: 2371 [2020-10-16 12:21:11,647 INFO L226 Difference]: Without dead ends: 1444 [2020-10-16 12:21:11,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 12:21:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-16 12:21:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-10-16 12:21:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-16 12:21:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-10-16 12:21:11,669 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-10-16 12:21:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:11,669 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-10-16 12:21:11,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:21:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-10-16 12:21:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:11,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:11,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:11,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 12:21:11,885 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 16 times [2020-10-16 12:21:11,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:11,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651629688] [2020-10-16 12:21:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-16 12:21:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651629688] [2020-10-16 12:21:11,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996739793] [2020-10-16 12:21:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:12,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:21:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:21:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-16 12:21:12,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:12,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-16 12:21:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034163756] [2020-10-16 12:21:12,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 12:21:12,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 12:21:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 12:21:12,055 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-10-16 12:21:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:12,380 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-10-16 12:21:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:21:12,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-16 12:21:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:12,384 INFO L225 Difference]: With dead ends: 1669 [2020-10-16 12:21:12,384 INFO L226 Difference]: Without dead ends: 744 [2020-10-16 12:21:12,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-16 12:21:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-16 12:21:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-10-16 12:21:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-16 12:21:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-16 12:21:12,394 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-16 12:21:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:12,395 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-16 12:21:12,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 12:21:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-16 12:21:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:12,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:12,396 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:12,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 12:21:12,610 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 17 times [2020-10-16 12:21:12,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:12,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985889773] [2020-10-16 12:21:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985889773] [2020-10-16 12:21:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780964284] [2020-10-16 12:21:12,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:12,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:21:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:12,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:12,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:12,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888445213] [2020-10-16 12:21:12,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:12,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:12,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:12,895 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-10-16 12:21:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:13,466 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-16 12:21:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:21:13,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:13,470 INFO L225 Difference]: With dead ends: 1734 [2020-10-16 12:21:13,470 INFO L226 Difference]: Without dead ends: 894 [2020-10-16 12:21:13,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:21:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-16 12:21:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-16 12:21:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-16 12:21:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-16 12:21:13,483 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-16 12:21:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:13,483 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-16 12:21:13,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-16 12:21:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:13,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:13,485 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:13,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:13,698 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 18 times [2020-10-16 12:21:13,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:13,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148450103] [2020-10-16 12:21:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:13,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148450103] [2020-10-16 12:21:13,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319485493] [2020-10-16 12:21:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:13,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 12:21:13,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:14,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958078068] [2020-10-16 12:21:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:14,002 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-10-16 12:21:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:14,587 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-16 12:21:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:21:14,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:14,593 INFO L225 Difference]: With dead ends: 1717 [2020-10-16 12:21:14,593 INFO L226 Difference]: Without dead ends: 774 [2020-10-16 12:21:14,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:21:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-16 12:21:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-16 12:21:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-16 12:21:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-16 12:21:14,604 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-16 12:21:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:14,604 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-16 12:21:14,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-16 12:21:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:14,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:14,606 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:14,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:14,819 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 19 times [2020-10-16 12:21:14,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:14,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304609162] [2020-10-16 12:21:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304609162] [2020-10-16 12:21:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559105936] [2020-10-16 12:21:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:15,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:15,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632264145] [2020-10-16 12:21:15,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:15,150 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-10-16 12:21:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:15,733 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-16 12:21:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:21:15,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:15,739 INFO L225 Difference]: With dead ends: 2063 [2020-10-16 12:21:15,739 INFO L226 Difference]: Without dead ends: 716 [2020-10-16 12:21:15,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 12:21:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-16 12:21:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-16 12:21:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-16 12:21:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-16 12:21:15,749 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-16 12:21:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:15,749 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-16 12:21:15,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-16 12:21:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:15,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:15,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:15,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 12:21:15,966 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 20 times [2020-10-16 12:21:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372987804] [2020-10-16 12:21:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:16,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372987804] [2020-10-16 12:21:16,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191354119] [2020-10-16 12:21:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:16,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:21:16,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:16,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735167780] [2020-10-16 12:21:16,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:16,283 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-10-16 12:21:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:16,908 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-16 12:21:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 12:21:16,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:16,912 INFO L225 Difference]: With dead ends: 2541 [2020-10-16 12:21:16,913 INFO L226 Difference]: Without dead ends: 658 [2020-10-16 12:21:16,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 12:21:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-16 12:21:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-16 12:21:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-16 12:21:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-16 12:21:16,923 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-16 12:21:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:16,923 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-16 12:21:16,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-16 12:21:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:16,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:16,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:17,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 12:21:17,139 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 21 times [2020-10-16 12:21:17,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:17,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170773523] [2020-10-16 12:21:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:17,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170773523] [2020-10-16 12:21:17,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277407465] [2020-10-16 12:21:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:17,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 12:21:17,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:17,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 12:21:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:17,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:17,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 12:21:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227611896] [2020-10-16 12:21:17,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:21:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:21:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:21:17,448 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-10-16 12:21:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:18,254 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-10-16 12:21:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:21:18,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 12:21:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:18,262 INFO L225 Difference]: With dead ends: 2473 [2020-10-16 12:21:18,262 INFO L226 Difference]: Without dead ends: 1507 [2020-10-16 12:21:18,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 12:21:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-16 12:21:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-10-16 12:21:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-16 12:21:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-10-16 12:21:18,284 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-10-16 12:21:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:18,284 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-10-16 12:21:18,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:21:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-10-16 12:21:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:18,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:18,286 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:18,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:18,500 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 22 times [2020-10-16 12:21:18,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:18,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42483457] [2020-10-16 12:21:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42483457] [2020-10-16 12:21:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54623252] [2020-10-16 12:21:18,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:18,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:21:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 12:21:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:21:18,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:18,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 12:21:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609208262] [2020-10-16 12:21:18,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:21:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:21:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:21:18,802 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-10-16 12:21:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:19,403 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-10-16 12:21:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:21:19,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 12:21:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:19,410 INFO L225 Difference]: With dead ends: 1951 [2020-10-16 12:21:19,411 INFO L226 Difference]: Without dead ends: 1081 [2020-10-16 12:21:19,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 12:21:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-16 12:21:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-10-16 12:21:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-16 12:21:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-10-16 12:21:19,427 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-10-16 12:21:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:19,427 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-10-16 12:21:19,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:21:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-10-16 12:21:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:19,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:19,429 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 12:21:19,643 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 23 times [2020-10-16 12:21:19,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:19,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561836112] [2020-10-16 12:21:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:21:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561836112] [2020-10-16 12:21:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785698356] [2020-10-16 12:21:19,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:19,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 12:21:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 12:21:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:21:19,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:19,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-16 12:21:19,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622979716] [2020-10-16 12:21:19,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:21:19,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:21:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:21:19,860 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-10-16 12:21:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:20,392 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-10-16 12:21:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 12:21:20,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 12:21:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:20,395 INFO L225 Difference]: With dead ends: 1790 [2020-10-16 12:21:20,396 INFO L226 Difference]: Without dead ends: 744 [2020-10-16 12:21:20,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 12:21:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-16 12:21:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-10-16 12:21:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-16 12:21:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-10-16 12:21:20,403 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-10-16 12:21:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:20,404 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-10-16 12:21:20,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:21:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-10-16 12:21:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 12:21:20,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:21:20,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:21:20,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:21:20,605 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 12:21:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:21:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 24 times [2020-10-16 12:21:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:21:20,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203711380] [2020-10-16 12:21:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:21:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:21:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:20,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203711380] [2020-10-16 12:21:20,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583480446] [2020-10-16 12:21:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 12:21:20,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 12:21:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:21:20,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 12:21:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:21:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 12:21:20,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:21:20,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 12:21:20,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467441991] [2020-10-16 12:21:20,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:21:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:21:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:21:20,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:21:20,794 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-10-16 12:21:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:21:21,194 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-10-16 12:21:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 12:21:21,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-16 12:21:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:21:21,195 INFO L225 Difference]: With dead ends: 1084 [2020-10-16 12:21:21,195 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 12:21:21,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 12:21:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 12:21:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 12:21:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 12:21:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 12:21:21,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-16 12:21:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:21:21,197 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 12:21:21,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:21:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 12:21:21,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 12:21:21,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 12:21:21,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:21:21 BasicIcfg [2020-10-16 12:21:21,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:21:21,406 INFO L168 Benchmark]: Toolchain (without parser) took 25419.98 ms. Allocated memory was 141.0 MB in the beginning and 406.3 MB in the end (delta: 265.3 MB). Free memory was 102.2 MB in the beginning and 248.7 MB in the end (delta: -146.5 MB). Peak memory consumption was 118.8 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,407 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 12:21:21,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.83 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 182.5 MB in the end (delta: -80.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 180.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,409 INFO L168 Benchmark]: Boogie Preprocessor took 49.08 ms. Allocated memory is still 203.9 MB. Free memory was 180.6 MB in the beginning and 178.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,409 INFO L168 Benchmark]: RCFGBuilder took 384.98 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 162.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,410 INFO L168 Benchmark]: TraceAbstraction took 24572.93 ms. Allocated memory was 203.9 MB in the beginning and 406.3 MB in the end (delta: 202.4 MB). Free memory was 161.6 MB in the beginning and 248.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. [2020-10-16 12:21:21,414 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.83 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 182.5 MB in the end (delta: -80.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 180.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.08 ms. Allocated memory is still 203.9 MB. Free memory was 180.6 MB in the beginning and 178.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.98 ms. Allocated memory is still 203.9 MB. Free memory was 178.9 MB in the beginning and 162.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24572.93 ms. Allocated memory was 203.9 MB in the beginning and 406.3 MB in the end (delta: 202.4 MB). Free memory was 161.6 MB in the beginning and 248.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 271 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 47 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.7s, 57 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 4 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 34 TotalNumberOfCompositions, 866 MoverChecksTotal - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.4s, OverallIterations: 26, TraceHistogramMax: 5, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 1926 SDtfs, 9011 SDslu, 9317 SDs, 0 SdLazy, 5664 SolverSat, 1140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1525 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 7142 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1613 NumberOfCodeBlocks, 1613 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 1562 ConstructedInterpolants, 0 QuantifiedInterpolants, 141580 SizeOfPredicates, 284 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 51 InterpolantComputations, 3 PerfectInterpolantSequences, 1427/1996 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 proved your program to be correct! Received shutdown request...