/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-McrAutomaton-WP.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 14:00:05,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 14:00:05,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 14:00:05,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 14:00:05,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 14:00:05,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 14:00:05,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 14:00:05,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 14:00:05,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 14:00:05,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 14:00:05,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 14:00:05,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 14:00:05,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 14:00:05,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 14:00:05,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 14:00:05,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 14:00:05,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 14:00:05,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 14:00:05,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 14:00:05,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 14:00:05,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 14:00:05,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 14:00:05,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 14:00:05,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 14:00:05,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 14:00:05,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 14:00:05,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 14:00:05,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 14:00:05,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 14:00:05,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 14:00:05,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 14:00:05,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 14:00:05,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 14:00:05,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 14:00:05,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 14:00:05,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 14:00:05,734 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-McrAutomaton-WP.epf [2020-10-16 14:00:05,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 14:00:05,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 14:00:05,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 14:00:05,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 14:00:05,767 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 14:00:05,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 14:00:05,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 14:00:05,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 14:00:05,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 14:00:05,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 14:00:05,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 14:00:05,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 14:00:05,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 14:00:05,768 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 14:00:05,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 14:00:05,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 14:00:05,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 14:00:05,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 14:00:05,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 14:00:05,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 14:00:05,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 14:00:05,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 14:00:05,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 14:00:05,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 14:00:05,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 14:00:05,771 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-16 14:00:06,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 14:00:06,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 14:00:06,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 14:00:06,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 14:00:06,087 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 14:00:06,088 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 14:00:06,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2a58515/9fc876d76c954e858bffa4766926340b/FLAG049e80fc0 [2020-10-16 14:00:06,586 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 14:00:06,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 14:00:06,587 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 14:00:06,588 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 14:00:06,588 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 14:00:06,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2a58515/9fc876d76c954e858bffa4766926340b/FLAG049e80fc0 [2020-10-16 14:00:06,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2a58515/9fc876d76c954e858bffa4766926340b [2020-10-16 14:00:06,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 14:00:06,956 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 14:00:06,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 14:00:06,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 14:00:06,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 14:00:06,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:00:06" (1/1) ... [2020-10-16 14:00:06,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5974a883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:06, skipping insertion in model container [2020-10-16 14:00:06,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:00:06" (1/1) ... [2020-10-16 14:00:06,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 14:00:06,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 14:00:07,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 14:00:07,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 14:00:07,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 14:00:07,277 INFO L208 MainTranslator]: Completed translation [2020-10-16 14:00:07,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07 WrapperNode [2020-10-16 14:00:07,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 14:00:07,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 14:00:07,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 14:00:07,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 14:00:07,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 14:00:07,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 14:00:07,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 14:00:07,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 14:00:07,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (1/1) ... [2020-10-16 14:00:07,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 14:00:07,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 14:00:07,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 14:00:07,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 14:00:07,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (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 14:00:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 14:00:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 14:00:07,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 14:00:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 14:00:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-16 14:00:07,421 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-16 14:00:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-16 14:00:07,422 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-16 14:00:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 14:00:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 14:00:07,423 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 14:00:07,671 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 14:00:07,672 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 14:00:07,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:00:07 BoogieIcfgContainer [2020-10-16 14:00:07,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 14:00:07,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 14:00:07,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 14:00:07,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 14:00:07,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:00:06" (1/3) ... [2020-10-16 14:00:07,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f24046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:00:07, skipping insertion in model container [2020-10-16 14:00:07,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:00:07" (2/3) ... [2020-10-16 14:00:07,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f24046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:00:07, skipping insertion in model container [2020-10-16 14:00:07,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:00:07" (3/3) ... [2020-10-16 14:00:07,690 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-16 14:00:07,724 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 14:00:07,725 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 14:00:07,742 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 14:00:07,746 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 14:00:07,798 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,799 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,799 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,799 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,800 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,800 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,800 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,801 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,801 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,801 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,801 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,802 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,802 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,803 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,803 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,803 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,804 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,804 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,804 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,804 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,805 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,805 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,808 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,809 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,809 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,809 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,809 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,815 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,815 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,816 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,816 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,816 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 14:00:07,830 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 14:00:07,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 14:00:07,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 14:00:07,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 14:00:07,864 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 14:00:07,864 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-16 14:00:07,864 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 14:00:07,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 14:00:07,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 14:00:07,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 14:00:07,880 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 14:00:07,881 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 14:00:07,883 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 14:00:07,884 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-16 14:00:07,925 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-16 14:00:07,926 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 14:00:07,931 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 14:00:07,936 INFO L117 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-16 14:00:08,670 INFO L132 LiptonReduction]: Checked pairs total: 866 [2020-10-16 14:00:08,670 INFO L134 LiptonReduction]: Total number of compositions: 34 [2020-10-16 14:00:08,678 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-16 14:00:08,691 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-16 14:00:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-16 14:00:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 14:00:08,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:08,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 14:00:08,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-16 14:00:08,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:08,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382909042] [2020-10-16 14:00:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:08,897 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 14:00:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382909042] [2020-10-16 14:00:08,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 14:00:08,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 14:00:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2012365617] [2020-10-16 14:00:08,902 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:08,907 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:08,930 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 63 transitions. [2020-10-16 14:00:08,930 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:08,970 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [203#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2020-10-16 14:00:08,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 14:00:08,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:08,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 14:00:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 14:00:08,989 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2020-10-16 14:00:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:09,030 INFO L93 Difference]: Finished difference Result 109 states and 241 transitions. [2020-10-16 14:00:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 14:00:09,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-16 14:00:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:09,044 INFO L225 Difference]: With dead ends: 109 [2020-10-16 14:00:09,044 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 14:00:09,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 14:00:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 14:00:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-16 14:00:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-16 14:00:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 240 transitions. [2020-10-16 14:00:09,103 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 240 transitions. Word has length 15 [2020-10-16 14:00:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:09,103 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 240 transitions. [2020-10-16 14:00:09,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 14:00:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 240 transitions. [2020-10-16 14:00:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 14:00:09,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:09,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 14:00:09,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 14:00:09,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:09,108 INFO L82 PathProgramCache]: Analyzing trace with hash -456809054, now seen corresponding path program 1 times [2020-10-16 14:00:09,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:09,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913920688] [2020-10-16 14:00:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 14:00:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913920688] [2020-10-16 14:00:09,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 14:00:09,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 14:00:09,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1445542208] [2020-10-16 14:00:09,170 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:09,173 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:09,180 INFO L258 McrAutomatonBuilder]: Finished intersection with 70 states and 131 transitions. [2020-10-16 14:00:09,181 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:09,242 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:09,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 14:00:09,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:09,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 14:00:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 14:00:09,245 INFO L87 Difference]: Start difference. First operand 108 states and 240 transitions. Second operand 3 states. [2020-10-16 14:00:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:09,260 INFO L93 Difference]: Finished difference Result 142 states and 322 transitions. [2020-10-16 14:00:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 14:00:09,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-16 14:00:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:09,263 INFO L225 Difference]: With dead ends: 142 [2020-10-16 14:00:09,264 INFO L226 Difference]: Without dead ends: 142 [2020-10-16 14:00:09,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 7 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 14:00:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-16 14:00:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-10-16 14:00:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 14:00:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 281 transitions. [2020-10-16 14:00:09,292 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 281 transitions. Word has length 19 [2020-10-16 14:00:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:09,293 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 281 transitions. [2020-10-16 14:00:09,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 14:00:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 281 transitions. [2020-10-16 14:00:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 14:00:09,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:09,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 14:00:09,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 14:00:09,298 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:09,298 INFO L82 PathProgramCache]: Analyzing trace with hash 166337548, now seen corresponding path program 1 times [2020-10-16 14:00:09,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:09,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256707341] [2020-10-16 14:00:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 14:00:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256707341] [2020-10-16 14:00:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060453304] [2020-10-16 14:00:09,414 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 14:00:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 14:00:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 14:00:09,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:09,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-16 14:00:09,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1479085918] [2020-10-16 14:00:09,507 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:09,510 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:09,518 INFO L258 McrAutomatonBuilder]: Finished intersection with 55 states and 96 transitions. [2020-10-16 14:00:09,519 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:09,612 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:09,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 14:00:09,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 14:00:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-16 14:00:09,614 INFO L87 Difference]: Start difference. First operand 125 states and 281 transitions. Second operand 4 states. [2020-10-16 14:00:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:09,635 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2020-10-16 14:00:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 14:00:09,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-16 14:00:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:09,638 INFO L225 Difference]: With dead ends: 176 [2020-10-16 14:00:09,638 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 14:00:09,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 13 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-16 14:00:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 14:00:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2020-10-16 14:00:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 14:00:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-16 14:00:09,655 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 21 [2020-10-16 14:00:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:09,656 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-16 14:00:09,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 14:00:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-16 14:00:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 14:00:09,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:09,661 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 14:00:09,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-16 14:00:09,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-16 14:00:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:09,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349823630] [2020-10-16 14:00:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:09,943 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 14:00:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349823630] [2020-10-16 14:00:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899057976] [2020-10-16 14:00:09,944 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 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 14:00:09,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 14:00:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 14:00:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:10,019 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 14:00:10,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:10,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 14:00:10,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842867461] [2020-10-16 14:00:10,020 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:10,025 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:10,035 INFO L258 McrAutomatonBuilder]: Finished intersection with 63 states and 112 transitions. [2020-10-16 14:00:10,036 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:10,169 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:10,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 14:00:10,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 14:00:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 14:00:10,170 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 5 states. [2020-10-16 14:00:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:10,194 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-16 14:00:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 14:00:10,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-16 14:00:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:10,197 INFO L225 Difference]: With dead ends: 210 [2020-10-16 14:00:10,197 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 14:00:10,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 16 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 14:00:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 14:00:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-16 14:00:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-16 14:00:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-16 14:00:10,212 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-16 14:00:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:10,212 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-16 14:00:10,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 14:00:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-16 14:00:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 14:00:10,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:10,215 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 14:00:10,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:10,431 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-16 14:00:10,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:10,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374598244] [2020-10-16 14:00:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:10,490 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 14:00:10,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374598244] [2020-10-16 14:00:10,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415305888] [2020-10-16 14:00:10,491 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 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 14:00:10,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 14:00:10,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 14:00:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:10,569 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 14:00:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:10,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 14:00:10,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627101326] [2020-10-16 14:00:10,571 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:10,574 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:10,583 INFO L258 McrAutomatonBuilder]: Finished intersection with 71 states and 128 transitions. [2020-10-16 14:00:10,583 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:10,719 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:10,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 14:00:10,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 14:00:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 14:00:10,721 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 6 states. [2020-10-16 14:00:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:10,746 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-16 14:00:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 14:00:10,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-16 14:00:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:10,749 INFO L225 Difference]: With dead ends: 244 [2020-10-16 14:00:10,749 INFO L226 Difference]: Without dead ends: 244 [2020-10-16 14:00:10,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 14:00:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-16 14:00:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-16 14:00:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-16 14:00:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-16 14:00:10,762 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-16 14:00:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:10,762 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-16 14:00:10,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 14:00:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-16 14:00:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 14:00:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:10,764 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 14:00:10,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:10,978 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-16 14:00:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:10,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587774306] [2020-10-16 14:00:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:11,096 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 14:00:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587774306] [2020-10-16 14:00:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74418617] [2020-10-16 14:00:11,097 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 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 14:00:11,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 14:00:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 14:00:11,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:11,163 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 14:00:11,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:11,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 14:00:11,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1206955285] [2020-10-16 14:00:11,164 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:11,168 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:11,180 INFO L258 McrAutomatonBuilder]: Finished intersection with 79 states and 144 transitions. [2020-10-16 14:00:11,180 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:11,414 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:11,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 14:00:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 14:00:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 14:00:11,416 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 7 states. [2020-10-16 14:00:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:11,446 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-16 14:00:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 14:00:11,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-16 14:00:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:11,448 INFO L225 Difference]: With dead ends: 261 [2020-10-16 14:00:11,449 INFO L226 Difference]: Without dead ends: 261 [2020-10-16 14:00:11,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 22 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 14:00:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-16 14:00:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-16 14:00:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-16 14:00:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-16 14:00:11,459 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-16 14:00:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:11,460 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-16 14:00:11,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 14:00:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-16 14:00:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 14:00:11,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:11,462 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 14:00:11,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:11,676 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-16 14:00:11,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:11,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450651141] [2020-10-16 14:00:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:11,750 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 14:00:11,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450651141] [2020-10-16 14:00:11,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576932693] [2020-10-16 14:00:11,751 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 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 14:00:11,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 14:00:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 14:00:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:11,804 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 14:00:11,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:11,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 14:00:11,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [833455322] [2020-10-16 14:00:11,805 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:11,809 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:11,823 INFO L258 McrAutomatonBuilder]: Finished intersection with 87 states and 160 transitions. [2020-10-16 14:00:11,824 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:11,932 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3888#(< firstIncrementThread1of1ForFork0_~i~0 4), 3889#(or (< firstIncrementThread1of1ForFork0_~i~0 4) (<= 5 firstIncrementThread1of1ForFork0_~i~0)), 3890#(or (<= 4 firstIncrementThread1of1ForFork0_~i~0) (< firstIncrementThread1of1ForFork0_~i~0 3)), 3887#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2020-10-16 14:00:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 14:00:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 14:00:11,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2020-10-16 14:00:11,934 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 9 states. [2020-10-16 14:00:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:11,985 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-16 14:00:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 14:00:11,985 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-16 14:00:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:11,989 INFO L225 Difference]: With dead ends: 447 [2020-10-16 14:00:11,989 INFO L226 Difference]: Without dead ends: 447 [2020-10-16 14:00:11,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-16 14:00:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-16 14:00:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-16 14:00:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-16 14:00:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-16 14:00:12,003 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 29 [2020-10-16 14:00:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:12,004 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-16 14:00:12,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 14:00:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-16 14:00:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:12,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:12,006 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 14:00:12,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-16 14:00:12,222 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 6 times [2020-10-16 14:00:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:12,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897056709] [2020-10-16 14:00:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:12,560 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 14:00:12,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897056709] [2020-10-16 14:00:12,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465225802] [2020-10-16 14:00:12,561 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 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 14:00:12,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 14:00:12,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 14:00:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:12,668 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 14:00:12,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 14:00:12,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-16 14:00:12,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335618679] [2020-10-16 14:00:12,669 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:12,674 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:12,690 INFO L258 McrAutomatonBuilder]: Finished intersection with 111 states and 208 transitions. [2020-10-16 14:00:12,690 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:12,801 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:12,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 14:00:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 14:00:12,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-16 14:00:12,802 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-16 14:00:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:13,543 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-16 14:00:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 14:00:13,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 14:00:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:13,551 INFO L225 Difference]: With dead ends: 1728 [2020-10-16 14:00:13,551 INFO L226 Difference]: Without dead ends: 876 [2020-10-16 14:00:13,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 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 14:00:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-16 14:00:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-16 14:00:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-16 14:00:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-16 14:00:13,572 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-16 14:00:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:13,572 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-16 14:00:13,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 14:00:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-16 14:00:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:13,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:13,574 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 14:00:13,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:13,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 7 times [2020-10-16 14:00:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:13,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743632211] [2020-10-16 14:00:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:14,018 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 14:00:14,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743632211] [2020-10-16 14:00:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742572803] [2020-10-16 14:00:14,019 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 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 14:00:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:14,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:14,132 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 14:00:14,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:14,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:14,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [376917742] [2020-10-16 14:00:14,137 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:14,144 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:14,172 INFO L258 McrAutomatonBuilder]: Finished intersection with 130 states and 239 transitions. [2020-10-16 14:00:14,172 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:14,316 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:14,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:14,318 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 21 states. [2020-10-16 14:00:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:14,968 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-16 14:00:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 14:00:14,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:14,975 INFO L225 Difference]: With dead ends: 1731 [2020-10-16 14:00:14,975 INFO L226 Difference]: Without dead ends: 816 [2020-10-16 14:00:14,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 14:00:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-16 14:00:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-16 14:00:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-16 14:00:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-16 14:00:14,992 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-16 14:00:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:14,992 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-16 14:00:14,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-16 14:00:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:14,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:14,994 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 14:00:15,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:15,206 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 8 times [2020-10-16 14:00:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:15,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231045102] [2020-10-16 14:00:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:15,453 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 14:00:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231045102] [2020-10-16 14:00:15,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130020394] [2020-10-16 14:00:15,454 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 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 14:00:15,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 14:00:15,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:15,557 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 14:00:15,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:15,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535316423] [2020-10-16 14:00:15,558 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:15,563 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:15,587 INFO L258 McrAutomatonBuilder]: Finished intersection with 118 states and 206 transitions. [2020-10-16 14:00:15,587 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:15,684 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:15,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:15,685 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 21 states. [2020-10-16 14:00:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:16,340 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-16 14:00:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:16,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:16,345 INFO L225 Difference]: With dead ends: 2131 [2020-10-16 14:00:16,345 INFO L226 Difference]: Without dead ends: 792 [2020-10-16 14:00:16,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 14:00:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-16 14:00:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-16 14:00:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-16 14:00:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-16 14:00:16,361 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-16 14:00:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:16,361 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-16 14:00:16,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-16 14:00:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:16,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:16,363 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 14:00:16,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 14:00:16,577 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 9 times [2020-10-16 14:00:16,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:16,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391937713] [2020-10-16 14:00:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:16,831 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 14:00:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391937713] [2020-10-16 14:00:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111398069] [2020-10-16 14:00:16,832 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 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 14:00:16,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-16 14:00:16,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:16,934 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 14:00:16,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:16,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:16,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [885802920] [2020-10-16 14:00:16,935 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:16,940 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:16,967 INFO L258 McrAutomatonBuilder]: Finished intersection with 124 states and 218 transitions. [2020-10-16 14:00:16,967 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:17,059 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:17,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:17,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:17,061 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 21 states. [2020-10-16 14:00:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:17,639 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-16 14:00:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:17,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:17,645 INFO L225 Difference]: With dead ends: 2670 [2020-10-16 14:00:17,645 INFO L226 Difference]: Without dead ends: 768 [2020-10-16 14:00:17,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 14:00:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-16 14:00:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-16 14:00:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-16 14:00:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-16 14:00:17,660 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-16 14:00:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:17,660 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-16 14:00:17,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-16 14:00:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:17,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:17,662 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 14:00:17,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:17,878 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 10 times [2020-10-16 14:00:17,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:17,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144569057] [2020-10-16 14:00:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:18,158 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 14:00:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144569057] [2020-10-16 14:00:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099674316] [2020-10-16 14:00:18,160 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 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 14:00:18,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 14:00:18,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:18,246 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 14:00:18,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:18,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876147193] [2020-10-16 14:00:18,247 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:18,252 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:18,275 INFO L258 McrAutomatonBuilder]: Finished intersection with 130 states and 230 transitions. [2020-10-16 14:00:18,275 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:18,377 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:18,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:18,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:18,378 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 21 states. [2020-10-16 14:00:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:19,110 INFO L93 Difference]: Finished difference Result 3002 states and 6985 transitions. [2020-10-16 14:00:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 14:00:19,111 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:19,123 INFO L225 Difference]: With dead ends: 3002 [2020-10-16 14:00:19,123 INFO L226 Difference]: Without dead ends: 2239 [2020-10-16 14:00:19,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 14:00:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2020-10-16 14:00:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1161. [2020-10-16 14:00:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2020-10-16 14:00:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2801 transitions. [2020-10-16 14:00:19,170 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2801 transitions. Word has length 35 [2020-10-16 14:00:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:19,170 INFO L481 AbstractCegarLoop]: Abstraction has 1161 states and 2801 transitions. [2020-10-16 14:00:19,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2801 transitions. [2020-10-16 14:00:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:19,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:19,173 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 14:00:19,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:19,388 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -664535820, now seen corresponding path program 11 times [2020-10-16 14:00:19,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:19,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632542984] [2020-10-16 14:00:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:19,609 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 14:00:19,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632542984] [2020-10-16 14:00:19,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862345758] [2020-10-16 14:00:19,610 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 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 14:00:19,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 14:00:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:19,687 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 14:00:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:19,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [845697592] [2020-10-16 14:00:19,688 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:19,693 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:19,710 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 160 transitions. [2020-10-16 14:00:19,710 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:19,764 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:19,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:19,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:19,766 INFO L87 Difference]: Start difference. First operand 1161 states and 2801 transitions. Second operand 21 states. [2020-10-16 14:00:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:20,508 INFO L93 Difference]: Finished difference Result 2571 states and 5988 transitions. [2020-10-16 14:00:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 14:00:20,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:20,525 INFO L225 Difference]: With dead ends: 2571 [2020-10-16 14:00:20,525 INFO L226 Difference]: Without dead ends: 1870 [2020-10-16 14:00:20,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=662, Invalid=1888, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 14:00:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2020-10-16 14:00:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1077. [2020-10-16 14:00:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-10-16 14:00:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2573 transitions. [2020-10-16 14:00:20,561 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2573 transitions. Word has length 35 [2020-10-16 14:00:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:20,561 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2573 transitions. [2020-10-16 14:00:20,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2573 transitions. [2020-10-16 14:00:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:20,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:20,565 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 14:00:20,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 14:00:20,779 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1221893120, now seen corresponding path program 12 times [2020-10-16 14:00:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:20,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454829238] [2020-10-16 14:00:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:21,038 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 14:00:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454829238] [2020-10-16 14:00:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779946010] [2020-10-16 14:00:21,039 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 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 14:00:21,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 14:00:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:21,162 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 14:00:21,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:21,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:21,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858363001] [2020-10-16 14:00:21,164 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:21,170 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:21,193 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 162 transitions. [2020-10-16 14:00:21,193 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:21,264 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:21,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:21,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:21,266 INFO L87 Difference]: Start difference. First operand 1077 states and 2573 transitions. Second operand 21 states. [2020-10-16 14:00:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:21,968 INFO L93 Difference]: Finished difference Result 2648 states and 6147 transitions. [2020-10-16 14:00:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 14:00:21,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:21,976 INFO L225 Difference]: With dead ends: 2648 [2020-10-16 14:00:21,976 INFO L226 Difference]: Without dead ends: 1604 [2020-10-16 14:00:21,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 14:00:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-10-16 14:00:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 943. [2020-10-16 14:00:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-10-16 14:00:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2226 transitions. [2020-10-16 14:00:22,005 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2226 transitions. Word has length 35 [2020-10-16 14:00:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:22,005 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 2226 transitions. [2020-10-16 14:00:22,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2226 transitions. [2020-10-16 14:00:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:22,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:22,008 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 14:00:22,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 14:00:22,224 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:22,224 INFO L82 PathProgramCache]: Analyzing trace with hash 28653580, now seen corresponding path program 13 times [2020-10-16 14:00:22,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:22,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39273792] [2020-10-16 14:00:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:22,426 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 14:00:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39273792] [2020-10-16 14:00:22,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759781854] [2020-10-16 14:00:22,427 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 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 14:00:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:22,522 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 14:00:22,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:22,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:22,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155416096] [2020-10-16 14:00:22,523 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:22,528 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:22,544 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 164 transitions. [2020-10-16 14:00:22,544 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:22,616 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:22,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:22,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:22,617 INFO L87 Difference]: Start difference. First operand 943 states and 2226 transitions. Second operand 21 states. [2020-10-16 14:00:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:23,276 INFO L93 Difference]: Finished difference Result 2739 states and 6338 transitions. [2020-10-16 14:00:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 14:00:23,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:23,283 INFO L225 Difference]: With dead ends: 2739 [2020-10-16 14:00:23,283 INFO L226 Difference]: Without dead ends: 1253 [2020-10-16 14:00:23,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 14:00:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-10-16 14:00:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 759. [2020-10-16 14:00:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2020-10-16 14:00:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1760 transitions. [2020-10-16 14:00:23,305 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1760 transitions. Word has length 35 [2020-10-16 14:00:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:23,306 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 1760 transitions. [2020-10-16 14:00:23,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1760 transitions. [2020-10-16 14:00:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:23,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:23,308 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 14:00:23,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 14:00:23,523 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -786810600, now seen corresponding path program 14 times [2020-10-16 14:00:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:23,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178414602] [2020-10-16 14:00:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:23,728 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 14:00:23,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178414602] [2020-10-16 14:00:23,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182964085] [2020-10-16 14:00:23,729 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 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 14:00:23,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 14:00:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:23,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:23,810 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 14:00:23,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:23,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:23,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323652285] [2020-10-16 14:00:23,811 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:23,816 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:23,834 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 166 transitions. [2020-10-16 14:00:23,835 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:23,890 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:23,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:23,891 INFO L87 Difference]: Start difference. First operand 759 states and 1760 transitions. Second operand 21 states. [2020-10-16 14:00:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:24,525 INFO L93 Difference]: Finished difference Result 2504 states and 5790 transitions. [2020-10-16 14:00:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 14:00:24,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:24,530 INFO L225 Difference]: With dead ends: 2504 [2020-10-16 14:00:24,530 INFO L226 Difference]: Without dead ends: 552 [2020-10-16 14:00:24,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1639, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 14:00:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-16 14:00:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 521. [2020-10-16 14:00:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-16 14:00:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-16 14:00:24,541 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-16 14:00:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-16 14:00:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-16 14:00:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:24,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:24,543 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 14:00:24,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:24,759 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 15 times [2020-10-16 14:00:24,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:24,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308700576] [2020-10-16 14:00:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:24,952 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 14:00:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308700576] [2020-10-16 14:00:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471999198] [2020-10-16 14:00:24,953 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 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 14:00:25,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 14:00:25,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:25,038 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 14:00:25,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:25,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1267638404] [2020-10-16 14:00:25,039 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:25,045 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:25,100 INFO L258 McrAutomatonBuilder]: Finished intersection with 140 states and 251 transitions. [2020-10-16 14:00:25,100 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:25,199 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41999#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-16 14:00:25,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 14:00:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 14:00:25,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:25,200 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 22 states. [2020-10-16 14:00:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:25,743 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-16 14:00:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 14:00:25,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-16 14:00:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:25,750 INFO L225 Difference]: With dead ends: 1734 [2020-10-16 14:00:25,750 INFO L226 Difference]: Without dead ends: 894 [2020-10-16 14:00:25,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 14:00:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-16 14:00:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-16 14:00:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-16 14:00:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-16 14:00:25,771 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-16 14:00:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:25,771 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-16 14:00:25,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 14:00:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-16 14:00:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:25,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:25,775 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 14:00:25,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 14:00:25,991 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 16 times [2020-10-16 14:00:25,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:25,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459982847] [2020-10-16 14:00:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:26,192 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 14:00:26,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459982847] [2020-10-16 14:00:26,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425306388] [2020-10-16 14:00:26,192 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 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 14:00:26,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 14:00:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:26,272 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 14:00:26,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:26,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118744237] [2020-10-16 14:00:26,273 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:26,278 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:26,294 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 159 transitions. [2020-10-16 14:00:26,294 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:26,348 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45064#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-16 14:00:26,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 14:00:26,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:26,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 14:00:26,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:26,349 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 22 states. [2020-10-16 14:00:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:26,977 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-16 14:00:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:26,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-16 14:00:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:26,982 INFO L225 Difference]: With dead ends: 1717 [2020-10-16 14:00:26,982 INFO L226 Difference]: Without dead ends: 774 [2020-10-16 14:00:26,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 14:00:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-16 14:00:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-16 14:00:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-16 14:00:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-16 14:00:26,993 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-16 14:00:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:26,993 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-16 14:00:26,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 14:00:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-16 14:00:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:26,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:26,994 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 14:00:27,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 14:00:27,195 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:27,196 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 17 times [2020-10-16 14:00:27,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:27,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019416432] [2020-10-16 14:00:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:27,389 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 14:00:27,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019416432] [2020-10-16 14:00:27,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136809050] [2020-10-16 14:00:27,390 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 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 14:00:27,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 14:00:27,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:27,469 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 14:00:27,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:27,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:27,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094004362] [2020-10-16 14:00:27,470 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:27,475 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:27,491 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 161 transitions. [2020-10-16 14:00:27,492 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:27,547 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48024#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-16 14:00:27,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 14:00:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 14:00:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:27,548 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 22 states. [2020-10-16 14:00:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:28,322 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-16 14:00:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:28,323 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-16 14:00:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:28,327 INFO L225 Difference]: With dead ends: 2063 [2020-10-16 14:00:28,327 INFO L226 Difference]: Without dead ends: 716 [2020-10-16 14:00:28,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 14:00:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-16 14:00:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-16 14:00:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-16 14:00:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-16 14:00:28,339 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-16 14:00:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:28,340 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-16 14:00:28,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 14:00:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-16 14:00:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:28,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:28,341 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 14:00:28,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:28,555 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 18 times [2020-10-16 14:00:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:28,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385371675] [2020-10-16 14:00:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:28,788 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 14:00:28,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385371675] [2020-10-16 14:00:28,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589755617] [2020-10-16 14:00:28,789 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 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 14:00:28,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 14:00:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:28,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:28,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:28,880 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 14:00:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:28,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945165285] [2020-10-16 14:00:28,883 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:28,888 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:28,904 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 163 transitions. [2020-10-16 14:00:28,904 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:28,963 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51244#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-16 14:00:28,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 14:00:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 14:00:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:28,965 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 22 states. [2020-10-16 14:00:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:29,588 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-16 14:00:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:29,589 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-16 14:00:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:29,593 INFO L225 Difference]: With dead ends: 2541 [2020-10-16 14:00:29,594 INFO L226 Difference]: Without dead ends: 658 [2020-10-16 14:00:29,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 14:00:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-16 14:00:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-16 14:00:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-16 14:00:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-16 14:00:29,604 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-16 14:00:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:29,604 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-16 14:00:29,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 14:00:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-16 14:00:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:29,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:29,606 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 14:00:29,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:29,820 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 19 times [2020-10-16 14:00:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:29,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982030123] [2020-10-16 14:00:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:30,026 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 14:00:30,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982030123] [2020-10-16 14:00:30,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825364926] [2020-10-16 14:00:30,027 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 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 14:00:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 14:00:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:30,153 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 14:00:30,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:30,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 14:00:30,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1735168388] [2020-10-16 14:00:30,154 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:30,163 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:30,185 INFO L258 McrAutomatonBuilder]: Finished intersection with 95 states and 165 transitions. [2020-10-16 14:00:30,185 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:30,240 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:30,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 14:00:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 14:00:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 14:00:30,241 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 21 states. [2020-10-16 14:00:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:30,891 INFO L93 Difference]: Finished difference Result 2615 states and 6067 transitions. [2020-10-16 14:00:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 14:00:30,892 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 14:00:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:30,901 INFO L225 Difference]: With dead ends: 2615 [2020-10-16 14:00:30,901 INFO L226 Difference]: Without dead ends: 1699 [2020-10-16 14:00:30,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=692, Invalid=1960, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 14:00:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-10-16 14:00:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 827. [2020-10-16 14:00:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-10-16 14:00:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1968 transitions. [2020-10-16 14:00:30,923 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1968 transitions. Word has length 35 [2020-10-16 14:00:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:30,923 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1968 transitions. [2020-10-16 14:00:30,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 14:00:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1968 transitions. [2020-10-16 14:00:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:30,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:30,926 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 14:00:31,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:31,140 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 20 times [2020-10-16 14:00:31,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:31,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153054957] [2020-10-16 14:00:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:31,352 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 14:00:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153054957] [2020-10-16 14:00:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438551602] [2020-10-16 14:00:31,353 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 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 14:00:31,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 14:00:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 14:00:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:31,420 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 14:00:31,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:31,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 14:00:31,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1114306182] [2020-10-16 14:00:31,421 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:31,426 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:31,443 INFO L258 McrAutomatonBuilder]: Finished intersection with 114 states and 198 transitions. [2020-10-16 14:00:31,443 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:31,504 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:31,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 14:00:31,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 14:00:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 14:00:31,505 INFO L87 Difference]: Start difference. First operand 827 states and 1968 transitions. Second operand 19 states. [2020-10-16 14:00:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:32,064 INFO L93 Difference]: Finished difference Result 2261 states and 5231 transitions. [2020-10-16 14:00:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 14:00:32,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 14:00:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:32,073 INFO L225 Difference]: With dead ends: 2261 [2020-10-16 14:00:32,073 INFO L226 Difference]: Without dead ends: 1294 [2020-10-16 14:00:32,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 14:00:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2020-10-16 14:00:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 693. [2020-10-16 14:00:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-16 14:00:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1621 transitions. [2020-10-16 14:00:32,091 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1621 transitions. Word has length 35 [2020-10-16 14:00:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:32,091 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 1621 transitions. [2020-10-16 14:00:32,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 14:00:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1621 transitions. [2020-10-16 14:00:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:32,093 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 14:00:32,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 14:00:32,307 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash 244641734, now seen corresponding path program 21 times [2020-10-16 14:00:32,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:32,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348375363] [2020-10-16 14:00:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:32,481 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 14:00:32,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348375363] [2020-10-16 14:00:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164926799] [2020-10-16 14:00:32,482 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 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 14:00:32,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 14:00:32,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 14:00:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:32,552 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 14:00:32,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:32,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 14:00:32,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634538843] [2020-10-16 14:00:32,553 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:32,558 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:32,577 INFO L258 McrAutomatonBuilder]: Finished intersection with 110 states and 185 transitions. [2020-10-16 14:00:32,577 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:32,638 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:32,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 14:00:32,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 14:00:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 14:00:32,640 INFO L87 Difference]: Start difference. First operand 693 states and 1621 transitions. Second operand 19 states. [2020-10-16 14:00:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:33,328 INFO L93 Difference]: Finished difference Result 2379 states and 5483 transitions. [2020-10-16 14:00:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 14:00:33,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 14:00:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:33,339 INFO L225 Difference]: With dead ends: 2379 [2020-10-16 14:00:33,339 INFO L226 Difference]: Without dead ends: 943 [2020-10-16 14:00:33,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 14:00:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-10-16 14:00:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 509. [2020-10-16 14:00:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-16 14:00:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1155 transitions. [2020-10-16 14:00:33,361 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1155 transitions. Word has length 35 [2020-10-16 14:00:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:33,361 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 1155 transitions. [2020-10-16 14:00:33,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 14:00:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1155 transitions. [2020-10-16 14:00:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 14:00:33,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 14:00:33,363 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 14:00:33,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 14:00:33,571 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 14:00:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 14:00:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1751254010, now seen corresponding path program 22 times [2020-10-16 14:00:33,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 14:00:33,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562221022] [2020-10-16 14:00:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 14:00:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 14:00:33,752 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 14:00:33,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562221022] [2020-10-16 14:00:33,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472250497] [2020-10-16 14:00:33,753 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 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 14:00:33,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 14:00:33,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 14:00:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 14:00:33,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 14:00:33,819 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 14:00:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 14:00:33,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 14:00:33,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540978426] [2020-10-16 14:00:33,820 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-16 14:00:33,825 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-16 14:00:33,846 INFO L258 McrAutomatonBuilder]: Finished intersection with 120 states and 207 transitions. [2020-10-16 14:00:33,846 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-16 14:00:33,918 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-16 14:00:33,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 14:00:33,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 14:00:33,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 14:00:33,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 14:00:33,920 INFO L87 Difference]: Start difference. First operand 509 states and 1155 transitions. Second operand 19 states. [2020-10-16 14:00:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 14:00:34,497 INFO L93 Difference]: Finished difference Result 1969 states and 4520 transitions. [2020-10-16 14:00:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 14:00:34,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 14:00:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 14:00:34,498 INFO L225 Difference]: With dead ends: 1969 [2020-10-16 14:00:34,498 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 14:00:34,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 14:00:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 14:00:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 14:00:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 14:00:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 14:00:34,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-16 14:00:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 14:00:34,500 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 14:00:34,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 14:00:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 14:00:34,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 14:00:34,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 14:00:34,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:00:34 BasicIcfg [2020-10-16 14:00:34,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 14:00:34,717 INFO L168 Benchmark]: Toolchain (without parser) took 27753.95 ms. Allocated memory was 140.0 MB in the beginning and 479.2 MB in the end (delta: 339.2 MB). Free memory was 101.8 MB in the beginning and 236.5 MB in the end (delta: -134.7 MB). Peak memory consumption was 204.5 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,717 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.91 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 182.0 MB in the end (delta: -80.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.95 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,719 INFO L168 Benchmark]: Boogie Preprocessor took 25.02 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 178.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,719 INFO L168 Benchmark]: RCFGBuilder took 326.39 ms. Allocated memory is still 203.4 MB. Free memory was 178.2 MB in the beginning and 162.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,720 INFO L168 Benchmark]: TraceAbstraction took 27030.84 ms. Allocated memory was 203.4 MB in the beginning and 479.2 MB in the end (delta: 275.8 MB). Free memory was 161.5 MB in the beginning and 236.5 MB in the end (delta: -75.0 MB). Peak memory consumption was 200.7 MB. Max. memory is 7.1 GB. [2020-10-16 14:00:34,726 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.91 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 182.0 MB in the end (delta: -80.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.95 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.02 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 178.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.39 ms. Allocated memory is still 203.4 MB. Free memory was 178.2 MB in the beginning and 162.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27030.84 ms. Allocated memory was 203.4 MB in the beginning and 479.2 MB in the end (delta: 275.8 MB). Free memory was 161.5 MB in the beginning and 236.5 MB in the end (delta: -75.0 MB). Peak memory consumption was 200.7 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: 26.8s, OverallIterations: 24, TraceHistogramMax: 5, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 1980 SDtfs, 8488 SDslu, 10048 SDs, 0 SdLazy, 6048 SolverSat, 1044 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2929 GetRequests, 2017 SyntacticMatches, 116 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1161occurred in iteration=12, 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, 24 MinimizatonAttempts, 7018 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1474 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1428 ConstructedInterpolants, 0 QuantifiedInterpolants, 132388 SizeOfPredicates, 307 NumberOfNonLiveVariables, 2333 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 46 InterpolantComputations, 3 PerfectInterpolantSequences, 1458/1854 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...