/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 15:59:03,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 15:59:03,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 15:59:03,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 15:59:03,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 15:59:03,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 15:59:03,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 15:59:03,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 15:59:03,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 15:59:03,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 15:59:03,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 15:59:03,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 15:59:03,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 15:59:03,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 15:59:03,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 15:59:03,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 15:59:03,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 15:59:03,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 15:59:03,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 15:59:03,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 15:59:03,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 15:59:03,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 15:59:03,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 15:59:03,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 15:59:03,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 15:59:03,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 15:59:03,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 15:59:03,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 15:59:03,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 15:59:03,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 15:59:03,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 15:59:03,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 15:59:03,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 15:59:03,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 15:59:03,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 15:59:03,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 15:59:03,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 15:59:03,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 15:59:03,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 15:59:03,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 15:59:03,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 15:59:03,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 15:59:03,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 15:59:03,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 15:59:03,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 15:59:03,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 15:59:03,523 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 15:59:03,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 15:59:03,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 15:59:03,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 15:59:03,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 15:59:03,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 15:59:03,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 15:59:03,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 15:59:03,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 15:59:03,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 15:59:03,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 15:59:03,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 15:59:03,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 15:59:03,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 15:59:03,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 15:59:03,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 15:59:03,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 15:59:03,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:59:03,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 15:59:03,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 15:59:03,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 15:59:03,529 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 15:59:03,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 15:59:03,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 15:59:03,530 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 15:59:03,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 15:59:03,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 15:59:03,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 15:59:03,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 15:59:03,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 15:59:03,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 15:59:03,844 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 15:59:03,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-04-18 15:59:03,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3e2a2c5/f1806d0817694f22916c388a237adfd7/FLAGba7333f1d [2020-04-18 15:59:04,328 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 15:59:04,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-04-18 15:59:04,329 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 15:59:04,329 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 15:59:04,330 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 15:59:04,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3e2a2c5/f1806d0817694f22916c388a237adfd7/FLAGba7333f1d [2020-04-18 15:59:04,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3e2a2c5/f1806d0817694f22916c388a237adfd7 [2020-04-18 15:59:04,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 15:59:04,774 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 15:59:04,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 15:59:04,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 15:59:04,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 15:59:04,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:59:04" (1/1) ... [2020-04-18 15:59:04,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692eb525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:04, skipping insertion in model container [2020-04-18 15:59:04,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:59:04" (1/1) ... [2020-04-18 15:59:04,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 15:59:04,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 15:59:05,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:59:05,125 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 15:59:05,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:59:05,153 INFO L208 MainTranslator]: Completed translation [2020-04-18 15:59:05,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05 WrapperNode [2020-04-18 15:59:05,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 15:59:05,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 15:59:05,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 15:59:05,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 15:59:05,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 15:59:05,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 15:59:05,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 15:59:05,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 15:59:05,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... [2020-04-18 15:59:05,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 15:59:05,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 15:59:05,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 15:59:05,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 15:59:05,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:59:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 15:59:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 15:59:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 15:59:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 15:59:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-04-18 15:59:05,268 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-04-18 15:59:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-04-18 15:59:05,268 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-04-18 15:59:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 15:59:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 15:59:05,270 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 15:59:05,575 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 15:59:05,575 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 15:59:05,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:59:05 BoogieIcfgContainer [2020-04-18 15:59:05,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 15:59:05,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 15:59:05,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 15:59:05,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 15:59:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:59:04" (1/3) ... [2020-04-18 15:59:05,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@912a64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:59:05, skipping insertion in model container [2020-04-18 15:59:05,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:59:05" (2/3) ... [2020-04-18 15:59:05,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@912a64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:59:05, skipping insertion in model container [2020-04-18 15:59:05,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:59:05" (3/3) ... [2020-04-18 15:59:05,586 INFO L109 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-04-18 15:59:05,595 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 15:59:05,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 15:59:05,602 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 15:59:05,603 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 15:59:05,639 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,639 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,640 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,640 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,640 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,641 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,641 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,641 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,641 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,642 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,642 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,642 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,643 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,643 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,643 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,644 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,644 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,644 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,644 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,645 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,645 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,645 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,649 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,649 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,649 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,650 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,650 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,655 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,656 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,656 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,656 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,657 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:59:05,682 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 15:59:05,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 15:59:05,698 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 15:59:05,698 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 15:59:05,698 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 15:59:05,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 15:59:05,699 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 15:59:05,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 15:59:05,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 15:59:05,713 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-04-18 15:59:05,714 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-04-18 15:59:05,753 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-04-18 15:59:05,754 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-18 15:59:05,759 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. [2020-04-18 15:59:05,762 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-04-18 15:59:05,786 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-04-18 15:59:05,786 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-04-18 15:59:05,791 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. [2020-04-18 15:59:05,794 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 528 [2020-04-18 15:59:05,795 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 15:59:06,531 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-04-18 15:59:06,581 INFO L206 etLargeBlockEncoding]: Checked pairs total: 426 [2020-04-18 15:59:06,582 INFO L214 etLargeBlockEncoding]: Total number of compositions: 32 [2020-04-18 15:59:06,586 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-04-18 15:59:06,598 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-04-18 15:59:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 15:59:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:59:06,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:59:06,609 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:59:06,609 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 15:59:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-04-18 15:59:06,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:59:06,621 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1228244383] [2020-04-18 15:59:06,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:06,658 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 63 transitions. [2020-04-18 15:59:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-04-18 15:59:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:59:06,661 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:59:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 2 times [2020-04-18 15:59:06,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:59:06,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245213202] [2020-04-18 15:59:06,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:59:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:59:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:59:06,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245213202] [2020-04-18 15:59:06,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:59:06,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:59:06,811 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:59:06,812 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:06,819 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 63 transitions. [2020-04-18 15:59:06,820 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:59:06,828 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:59:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:59:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:59:06,837 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-04-18 15:59:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:06,849 INFO L93 Difference]: Finished difference Result 38 states and 63 transitions. [2020-04-18 15:59:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2020-04-18 15:59:06,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:59:06,851 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1228244383] [2020-04-18 15:59:06,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:06,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:59:06,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1228244383] [2020-04-18 15:59:06,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 15:59:06,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:59:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:59:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:59:06,862 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-04-18 15:59:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:06,886 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-04-18 15:59:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 15:59:06,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-04-18 15:59:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:59:06,900 INFO L225 Difference]: With dead ends: 96 [2020-04-18 15:59:06,900 INFO L226 Difference]: Without dead ends: 95 [2020-04-18 15:59:06,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:59:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-18 15:59:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-04-18 15:59:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-18 15:59:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-04-18 15:59:06,957 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-04-18 15:59:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:59:06,957 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-04-18 15:59:06,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 15:59:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-04-18 15:59:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:59:06,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:59:06,959 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:59:06,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 15:59:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-04-18 15:59:06,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:59:06,961 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1664407982] [2020-04-18 15:59:06,962 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:06,964 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 97 transitions. [2020-04-18 15:59:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-04-18 15:59:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:59:06,966 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:59:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 2 times [2020-04-18 15:59:06,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:59:06,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416914304] [2020-04-18 15:59:06,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:59:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:59:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:59:07,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416914304] [2020-04-18 15:59:07,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321019877] [2020-04-18 15:59:07,025 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:07,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:59:07,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:59:07,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2020-04-18 15:59:07,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:59:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 15:59:07,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:07,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-04-18 15:59:07,125 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:59:07,126 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:07,136 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 97 transitions. [2020-04-18 15:59:07,136 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:59:07,295 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 15:59:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 15:59:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-18 15:59:07,297 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 13 states. [2020-04-18 15:59:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:07,403 INFO L93 Difference]: Finished difference Result 54 states and 97 transitions. [2020-04-18 15:59:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-04-18 15:59:07,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:59:07,405 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1664407982] [2020-04-18 15:59:07,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:07,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:59:07,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1664407982] [2020-04-18 15:59:07,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 15:59:07,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:59:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 15:59:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-18 15:59:07,409 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 13 states. [2020-04-18 15:59:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:08,329 INFO L93 Difference]: Finished difference Result 350 states and 793 transitions. [2020-04-18 15:59:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-18 15:59:08,330 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-18 15:59:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:59:08,337 INFO L225 Difference]: With dead ends: 350 [2020-04-18 15:59:08,337 INFO L226 Difference]: Without dead ends: 350 [2020-04-18 15:59:08,338 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 15:59:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-04-18 15:59:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 181. [2020-04-18 15:59:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-04-18 15:59:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 434 transitions. [2020-04-18 15:59:08,386 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 434 transitions. Word has length 17 [2020-04-18 15:59:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:59:08,387 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 434 transitions. [2020-04-18 15:59:08,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 15:59:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 434 transitions. [2020-04-18 15:59:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:59:08,394 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:59:08,394 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:59:08,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:08,600 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 15:59:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 893512898, now seen corresponding path program 1 times [2020-04-18 15:59:08,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:59:08,601 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [160135955] [2020-04-18 15:59:08,603 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:08,605 INFO L259 McrAutomatonBuilder]: Finished intersection with 110 states and 221 transitions. [2020-04-18 15:59:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-04-18 15:59:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:59:08,607 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:59:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash 893512898, now seen corresponding path program 2 times [2020-04-18 15:59:08,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:59:08,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703622271] [2020-04-18 15:59:08,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:59:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:59:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 15:59:08,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703622271] [2020-04-18 15:59:08,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280655295] [2020-04-18 15:59:08,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:08,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:59:08,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:59:08,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 15:59:08,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:59:08,781 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 15:59:08,781 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 15:59:08,797 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 15:59:08,797 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 15:59:08,798 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-04-18 15:59:08,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-04-18 15:59:08,823 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 15:59:08,829 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 15:59:08,830 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 15:59:08,830 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-04-18 15:59:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-18 15:59:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:08,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-04-18 15:59:08,849 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:59:08,851 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:08,864 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 126 transitions. [2020-04-18 15:59:08,864 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:59:09,107 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 15:59:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 15:59:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-18 15:59:09,109 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 15 states. [2020-04-18 15:59:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:09,583 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2020-04-18 15:59:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 221 transitions. [2020-04-18 15:59:09,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:59:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [160135955] [2020-04-18 15:59:09,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:09,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 15:59:09,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [160135955] [2020-04-18 15:59:09,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 15:59:09,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:59:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 15:59:09,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2020-04-18 15:59:09,586 INFO L87 Difference]: Start difference. First operand 181 states and 434 transitions. Second operand 15 states. [2020-04-18 15:59:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:10,062 INFO L93 Difference]: Finished difference Result 286 states and 675 transitions. [2020-04-18 15:59:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 15:59:10,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-04-18 15:59:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:59:10,066 INFO L225 Difference]: With dead ends: 286 [2020-04-18 15:59:10,066 INFO L226 Difference]: Without dead ends: 242 [2020-04-18 15:59:10,067 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 15:59:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-18 15:59:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 200. [2020-04-18 15:59:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-18 15:59:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 472 transitions. [2020-04-18 15:59:10,079 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 472 transitions. Word has length 21 [2020-04-18 15:59:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:59:10,079 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 472 transitions. [2020-04-18 15:59:10,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 15:59:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 472 transitions. [2020-04-18 15:59:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 15:59:10,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:59:10,081 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:59:10,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:10,284 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 15:59:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1659707972, now seen corresponding path program 1 times [2020-04-18 15:59:10,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:59:10,286 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [98337089] [2020-04-18 15:59:10,287 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:10,292 INFO L259 McrAutomatonBuilder]: Finished intersection with 170 states and 361 transitions. [2020-04-18 15:59:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-04-18 15:59:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 15:59:10,298 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:59:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:10,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1498404932, now seen corresponding path program 2 times [2020-04-18 15:59:10,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:59:10,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340905388] [2020-04-18 15:59:10,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:59:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:59:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 15:59:10,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340905388] [2020-04-18 15:59:10,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036264748] [2020-04-18 15:59:10,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:10,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 15:59:10,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:59:10,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 15:59:10,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:59:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 15:59:10,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:59:10,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2020-04-18 15:59:10,616 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:59:10,618 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:10,627 INFO L259 McrAutomatonBuilder]: Finished intersection with 71 states and 128 transitions. [2020-04-18 15:59:10,628 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:59:11,844 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 54 times. [2020-04-18 15:59:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-04-18 15:59:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 15:59:11,846 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 48 states. [2020-04-18 15:59:13,753 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-04-18 15:59:15,313 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-04-18 15:59:17,025 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-04-18 15:59:19,104 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-04-18 15:59:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:31,078 INFO L93 Difference]: Finished difference Result 475 states and 1060 transitions. [2020-04-18 15:59:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1060 transitions. [2020-04-18 15:59:31,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:59:31,080 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [98337089] [2020-04-18 15:59:31,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:59:31,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 15:59:31,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [98337089] [2020-04-18 15:59:31,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-04-18 15:59:31,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:59:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-04-18 15:59:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6266, Invalid=21790, Unknown=0, NotChecked=0, Total=28056 [2020-04-18 15:59:31,089 INFO L87 Difference]: Start difference. First operand 200 states and 472 transitions. Second operand 48 states. [2020-04-18 15:59:33,310 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-04-18 15:59:37,533 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-04-18 15:59:38,069 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-04-18 15:59:38,609 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-04-18 15:59:40,009 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 15:59:40,166 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-04-18 15:59:41,306 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-04-18 15:59:41,456 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-04-18 15:59:42,858 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-04-18 15:59:43,113 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 15:59:43,269 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-04-18 15:59:44,302 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-04-18 15:59:44,502 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-04-18 15:59:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:59:46,350 INFO L93 Difference]: Finished difference Result 1319 states and 3156 transitions. [2020-04-18 15:59:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2020-04-18 15:59:46,351 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 25 [2020-04-18 15:59:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:59:46,373 INFO L225 Difference]: With dead ends: 1319 [2020-04-18 15:59:46,373 INFO L226 Difference]: Without dead ends: 1233 [2020-04-18 15:59:46,416 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 490 SyntacticMatches, 14 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51564 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=16211, Invalid=99729, Unknown=0, NotChecked=0, Total=115940 [2020-04-18 15:59:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-04-18 15:59:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 308. [2020-04-18 15:59:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-04-18 15:59:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 760 transitions. [2020-04-18 15:59:46,468 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 760 transitions. Word has length 25 [2020-04-18 15:59:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:59:46,470 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 760 transitions. [2020-04-18 15:59:46,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-04-18 15:59:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 760 transitions. [2020-04-18 15:59:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 15:59:46,473 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:59:46,473 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:59:46,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:59:46,680 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 15:59:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 414174886, now seen corresponding path program 3 times [2020-04-18 15:59:46,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:59:46,681 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2092366840] [2020-04-18 15:59:46,682 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:46,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 212 states and 459 transitions. [2020-04-18 15:59:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2020-04-18 15:59:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 15:59:46,688 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:59:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:59:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1735960230, now seen corresponding path program 4 times [2020-04-18 15:59:46,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:59:46,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477202780] [2020-04-18 15:59:46,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:59:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:59:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 15:59:46,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477202780] [2020-04-18 15:59:46,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352813209] [2020-04-18 15:59:46,848 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 15:59:46,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:59:46,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:59:46,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-18 15:59:46,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:59:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 15:59:46,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:59:46,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2020-04-18 15:59:46,952 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:59:46,954 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:59:46,991 INFO L259 McrAutomatonBuilder]: Finished intersection with 79 states and 144 transitions. [2020-04-18 15:59:46,991 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:59:48,064 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 56 times. [2020-04-18 15:59:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 15:59:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 15:59:48,066 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 49 states. [2020-04-18 15:59:51,296 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-04-18 15:59:55,149 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-04-18 16:00:00,499 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-04-18 16:00:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:00:14,216 INFO L93 Difference]: Finished difference Result 637 states and 1438 transitions. [2020-04-18 16:00:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1438 transitions. [2020-04-18 16:00:14,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:00:14,219 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2092366840] [2020-04-18 16:00:14,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:00:14,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 16:00:14,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2092366840] [2020-04-18 16:00:14,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 16:00:14,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:00:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 16:00:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9678, Invalid=35478, Unknown=0, NotChecked=0, Total=45156 [2020-04-18 16:00:14,223 INFO L87 Difference]: Start difference. First operand 308 states and 760 transitions. Second operand 49 states. [2020-04-18 16:00:16,376 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-04-18 16:00:16,534 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-04-18 16:00:17,443 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-04-18 16:00:18,386 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-04-18 16:00:20,354 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-04-18 16:00:22,534 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-04-18 16:00:23,808 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-04-18 16:00:25,289 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 16:00:25,445 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-04-18 16:00:26,542 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-04-18 16:00:26,693 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-04-18 16:00:27,916 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-04-18 16:00:28,168 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 16:00:28,327 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-04-18 16:00:29,172 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-04-18 16:00:29,336 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-04-18 16:00:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:00:30,945 INFO L93 Difference]: Finished difference Result 1485 states and 3567 transitions. [2020-04-18 16:00:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2020-04-18 16:00:30,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 27 [2020-04-18 16:00:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:00:30,956 INFO L225 Difference]: With dead ends: 1485 [2020-04-18 16:00:30,956 INFO L226 Difference]: Without dead ends: 1485 [2020-04-18 16:00:30,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 583 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70651 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=21608, Invalid=136398, Unknown=0, NotChecked=0, Total=158006 [2020-04-18 16:00:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2020-04-18 16:00:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 366. [2020-04-18 16:00:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-04-18 16:00:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 902 transitions. [2020-04-18 16:00:30,987 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 902 transitions. Word has length 27 [2020-04-18 16:00:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:00:30,987 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 902 transitions. [2020-04-18 16:00:30,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 16:00:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 902 transitions. [2020-04-18 16:00:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 16:00:30,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:00:30,990 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:00:31,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:00:31,196 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 16:00:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:00:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 550776080, now seen corresponding path program 5 times [2020-04-18 16:00:31,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:00:31,198 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1565343845] [2020-04-18 16:00:31,199 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:00:31,208 INFO L259 McrAutomatonBuilder]: Finished intersection with 254 states and 557 transitions. [2020-04-18 16:00:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-04-18 16:00:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 16:00:31,214 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:00:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:00:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 404558608, now seen corresponding path program 6 times [2020-04-18 16:00:31,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:00:31,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708672186] [2020-04-18 16:00:31,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:00:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:00:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 16:00:31,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708672186] [2020-04-18 16:00:31,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705288378] [2020-04-18 16:00:31,399 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:00:31,440 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-18 16:00:31,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:00:31,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-18 16:00:31,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:00:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 16:00:31,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:00:31,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2020-04-18 16:00:31,496 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:00:31,499 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:00:31,513 INFO L259 McrAutomatonBuilder]: Finished intersection with 87 states and 160 transitions. [2020-04-18 16:00:31,514 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:00:32,205 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 35 times. [2020-04-18 16:00:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 16:00:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 16:00:32,206 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 37 states. [2020-04-18 16:00:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:00:37,076 INFO L93 Difference]: Finished difference Result 530 states and 1213 transitions. [2020-04-18 16:00:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1213 transitions. [2020-04-18 16:00:37,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:00:37,078 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1565343845] [2020-04-18 16:00:37,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:00:37,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 16:00:37,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1565343845] [2020-04-18 16:00:37,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 16:00:37,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:00:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 16:00:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1936, Invalid=6436, Unknown=0, NotChecked=0, Total=8372 [2020-04-18 16:00:37,080 INFO L87 Difference]: Start difference. First operand 366 states and 902 transitions. Second operand 37 states. [2020-04-18 16:00:38,278 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 16:00:39,192 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-04-18 16:00:39,435 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-04-18 16:00:40,037 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-04-18 16:00:40,209 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-04-18 16:00:40,348 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-04-18 16:00:40,646 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-04-18 16:00:41,056 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-04-18 16:00:41,657 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-04-18 16:00:41,938 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-04-18 16:00:42,385 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-04-18 16:00:42,659 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-04-18 16:00:43,208 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-04-18 16:00:43,477 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-04-18 16:00:43,875 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-04-18 16:00:44,021 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-04-18 16:00:44,549 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-04-18 16:00:44,784 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-04-18 16:00:44,933 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-04-18 16:00:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:00:45,174 INFO L93 Difference]: Finished difference Result 1515 states and 3511 transitions. [2020-04-18 16:00:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-04-18 16:00:45,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 29 [2020-04-18 16:00:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:00:45,185 INFO L225 Difference]: With dead ends: 1515 [2020-04-18 16:00:45,185 INFO L226 Difference]: Without dead ends: 1508 [2020-04-18 16:00:45,187 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9419 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4272, Invalid=21488, Unknown=0, NotChecked=0, Total=25760 [2020-04-18 16:00:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2020-04-18 16:00:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 497. [2020-04-18 16:00:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-04-18 16:00:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1241 transitions. [2020-04-18 16:00:45,213 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1241 transitions. Word has length 29 [2020-04-18 16:00:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:00:45,213 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 1241 transitions. [2020-04-18 16:00:45,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 16:00:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1241 transitions. [2020-04-18 16:00:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 16:00:45,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:00:45,215 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:00:45,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:00:45,419 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 16:00:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:00:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1649012984, now seen corresponding path program 7 times [2020-04-18 16:00:45,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:00:45,420 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [910116621] [2020-04-18 16:00:45,422 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:00:45,433 INFO L259 McrAutomatonBuilder]: Finished intersection with 302 states and 671 transitions. [2020-04-18 16:00:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states. [2020-04-18 16:00:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 16:00:45,436 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:00:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:00:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2083667030, now seen corresponding path program 8 times [2020-04-18 16:00:45,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:00:45,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824369503] [2020-04-18 16:00:45,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:00:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:00:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-04-18 16:00:45,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824369503] [2020-04-18 16:00:45,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567338808] [2020-04-18 16:00:45,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:00:45,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:00:45,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:00:45,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 16:00:45,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:00:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-04-18 16:00:45,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:00:45,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2020-04-18 16:00:45,794 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:00:45,797 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:00:45,812 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 176 transitions. [2020-04-18 16:00:45,812 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:00:47,238 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 65 times. [2020-04-18 16:00:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-04-18 16:00:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2662, Unknown=0, NotChecked=0, Total=3080 [2020-04-18 16:00:47,240 INFO L87 Difference]: Start difference. First operand 302 states. Second operand 56 states. [2020-04-18 16:00:50,808 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-04-18 16:00:53,333 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-04-18 16:01:01,693 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-04-18 16:01:10,033 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-04-18 16:01:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:01:35,078 INFO L93 Difference]: Finished difference Result 1006 states and 2326 transitions. [2020-04-18 16:01:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2326 transitions. [2020-04-18 16:01:35,081 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:01:35,082 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [910116621] [2020-04-18 16:01:35,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:01:35,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 16:01:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [910116621] [2020-04-18 16:01:35,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-04-18 16:01:35,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:01:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-04-18 16:01:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17029, Invalid=75083, Unknown=0, NotChecked=0, Total=92112 [2020-04-18 16:01:35,087 INFO L87 Difference]: Start difference. First operand 497 states and 1241 transitions. Second operand 56 states. [2020-04-18 16:01:38,542 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-04-18 16:01:39,118 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-04-18 16:01:40,436 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-04-18 16:01:41,695 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-04-18 16:01:43,140 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-04-18 16:01:43,298 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-04-18 16:01:44,417 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-04-18 16:01:45,173 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-04-18 16:01:45,926 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-04-18 16:01:46,160 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 16:01:47,369 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-04-18 16:01:47,558 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-04-18 16:01:48,854 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-04-18 16:01:49,179 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-04-18 16:01:49,447 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 16:01:50,577 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-04-18 16:01:50,769 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-04-18 16:01:50,936 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-04-18 16:01:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:01:52,429 INFO L93 Difference]: Finished difference Result 1624 states and 3832 transitions. [2020-04-18 16:01:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2020-04-18 16:01:52,430 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 31 [2020-04-18 16:01:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:01:52,439 INFO L225 Difference]: With dead ends: 1624 [2020-04-18 16:01:52,439 INFO L226 Difference]: Without dead ends: 1617 [2020-04-18 16:01:52,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1227 GetRequests, 768 SyntacticMatches, 3 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92942 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=27454, Invalid=181852, Unknown=0, NotChecked=0, Total=209306 [2020-04-18 16:01:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2020-04-18 16:01:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 579. [2020-04-18 16:01:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-04-18 16:01:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1443 transitions. [2020-04-18 16:01:52,473 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1443 transitions. Word has length 31 [2020-04-18 16:01:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:01:52,474 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 1443 transitions. [2020-04-18 16:01:52,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-04-18 16:01:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1443 transitions. [2020-04-18 16:01:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 16:01:52,476 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:01:52,476 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:01:52,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:01:52,679 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 16:01:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:01:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -959148174, now seen corresponding path program 9 times [2020-04-18 16:01:52,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:01:52,680 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [135906547] [2020-04-18 16:01:52,682 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:01:52,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 352 states and 789 transitions. [2020-04-18 16:01:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states. [2020-04-18 16:01:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 16:01:52,689 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:01:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:01:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 10 times [2020-04-18 16:01:52,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:01:52,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378166016] [2020-04-18 16:01:52,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:01:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:01:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 16:01:52,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378166016] [2020-04-18 16:01:52,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192315307] [2020-04-18 16:01:52,870 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 16:01:52,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:01:52,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:01:52,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:01:52,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:01:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:01:53,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:01:53,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [16] total 34 [2020-04-18 16:01:53,112 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:01:53,115 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:01:53,126 INFO L259 McrAutomatonBuilder]: Finished intersection with 103 states and 192 transitions. [2020-04-18 16:01:53,127 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:01:53,595 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 53 times. [2020-04-18 16:01:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 16:01:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 16:01:53,595 INFO L87 Difference]: Start difference. First operand 352 states. Second operand 36 states. [2020-04-18 16:01:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:01:56,263 INFO L93 Difference]: Finished difference Result 885 states and 1905 transitions. [2020-04-18 16:01:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1905 transitions. [2020-04-18 16:01:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 16:01:56,266 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 16:01:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:01:56,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1059611054, now seen corresponding path program 11 times [2020-04-18 16:01:56,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:01:56,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913336187] [2020-04-18 16:01:56,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:01:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:01:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 16:01:56,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913336187] [2020-04-18 16:01:56,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104063415] [2020-04-18 16:01:56,424 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:01:56,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-18 16:01:56,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:01:56,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 16:01:56,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:01:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-04-18 16:01:56,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:01:56,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 21 [2020-04-18 16:01:56,510 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:01:56,514 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:01:56,527 INFO L259 McrAutomatonBuilder]: Finished intersection with 118 states and 215 transitions. [2020-04-18 16:01:56,528 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:01:56,781 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 27 times. [2020-04-18 16:01:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 16:01:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=5041, Unknown=0, NotChecked=0, Total=6320 [2020-04-18 16:01:56,783 INFO L87 Difference]: Start difference. First operand 885 states and 1905 transitions. Second operand 30 states. [2020-04-18 16:02:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:03,078 INFO L93 Difference]: Finished difference Result 1185 states and 2483 transitions. [2020-04-18 16:02:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2483 transitions. [2020-04-18 16:02:03,081 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:02:03,081 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [135906547] [2020-04-18 16:02:03,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:02:03,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-04-18 16:02:03,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [135906547] [2020-04-18 16:02:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 16:02:03,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:02:03,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 16:02:03,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4603, Invalid=24467, Unknown=0, NotChecked=0, Total=29070 [2020-04-18 16:02:03,084 INFO L87 Difference]: Start difference. First operand 579 states and 1443 transitions. Second operand 45 states. [2020-04-18 16:02:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:09,247 INFO L93 Difference]: Finished difference Result 1862 states and 4316 transitions. [2020-04-18 16:02:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-04-18 16:02:09,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 33 [2020-04-18 16:02:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:02:09,252 INFO L225 Difference]: With dead ends: 1862 [2020-04-18 16:02:09,252 INFO L226 Difference]: Without dead ends: 1022 [2020-04-18 16:02:09,257 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33845 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13902, Invalid=72240, Unknown=0, NotChecked=0, Total=86142 [2020-04-18 16:02:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2020-04-18 16:02:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 544. [2020-04-18 16:02:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-04-18 16:02:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1316 transitions. [2020-04-18 16:02:09,273 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1316 transitions. Word has length 33 [2020-04-18 16:02:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:02:09,273 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 1316 transitions. [2020-04-18 16:02:09,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 16:02:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1316 transitions. [2020-04-18 16:02:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:09,275 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:02:09,275 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:02:09,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:09,679 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 16:02:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1180554904, now seen corresponding path program 12 times [2020-04-18 16:02:09,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:02:09,681 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1597063759] [2020-04-18 16:02:09,682 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:09,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 408 states and 923 transitions. [2020-04-18 16:02:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states. [2020-04-18 16:02:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:09,690 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:02:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 13 times [2020-04-18 16:02:09,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:09,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73973787] [2020-04-18 16:02:09,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:09,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73973787] [2020-04-18 16:02:09,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 16:02:09,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-04-18 16:02:09,910 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:09,913 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:09,927 INFO L259 McrAutomatonBuilder]: Finished intersection with 111 states and 208 transitions. [2020-04-18 16:02:09,927 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:10,097 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 30 times. [2020-04-18 16:02:10,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 16:02:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-18 16:02:10,098 INFO L87 Difference]: Start difference. First operand 408 states. Second operand 23 states. [2020-04-18 16:02:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:11,065 INFO L93 Difference]: Finished difference Result 1077 states and 2337 transitions. [2020-04-18 16:02:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2337 transitions. [2020-04-18 16:02:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:11,067 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 16:02:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 14 times [2020-04-18 16:02:11,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:11,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209445349] [2020-04-18 16:02:11,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:11,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209445349] [2020-04-18 16:02:11,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890253487] [2020-04-18 16:02:11,244 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:11,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:02:11,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:11,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:11,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:11,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:11,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:11,293 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:11,296 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:11,311 INFO L259 McrAutomatonBuilder]: Finished intersection with 130 states and 239 transitions. [2020-04-18 16:02:11,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:11,365 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 28 times. [2020-04-18 16:02:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 16:02:11,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=1367, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 16:02:11,366 INFO L87 Difference]: Start difference. First operand 1077 states and 2337 transitions. Second operand 22 states. [2020-04-18 16:02:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:12,629 INFO L93 Difference]: Finished difference Result 2042 states and 4138 transitions. [2020-04-18 16:02:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 4138 transitions. [2020-04-18 16:02:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:12,633 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 16:02:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 15 times [2020-04-18 16:02:12,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:12,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985199176] [2020-04-18 16:02:12,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985199176] [2020-04-18 16:02:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073389654] [2020-04-18 16:02:12,816 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:12,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-18 16:02:12,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:12,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:12,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:12,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:12,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:12,864 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:12,867 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:12,881 INFO L259 McrAutomatonBuilder]: Finished intersection with 118 states and 206 transitions. [2020-04-18 16:02:12,881 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:13,215 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 36 times. [2020-04-18 16:02:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 16:02:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=3776, Unknown=0, NotChecked=0, Total=5112 [2020-04-18 16:02:13,216 INFO L87 Difference]: Start difference. First operand 2042 states and 4138 transitions. Second operand 30 states. [2020-04-18 16:02:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:19,706 INFO L93 Difference]: Finished difference Result 3999 states and 8083 transitions. [2020-04-18 16:02:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 8083 transitions. [2020-04-18 16:02:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:19,711 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 16:02:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 16 times [2020-04-18 16:02:19,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:19,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349320215] [2020-04-18 16:02:19,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:19,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349320215] [2020-04-18 16:02:19,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079121137] [2020-04-18 16:02:19,941 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:19,993 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:02:19,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:19,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:19,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:20,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:20,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:20,005 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:20,009 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:20,029 INFO L259 McrAutomatonBuilder]: Finished intersection with 124 states and 218 transitions. [2020-04-18 16:02:20,030 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:20,504 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 44 times. [2020-04-18 16:02:20,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-18 16:02:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3438, Invalid=14118, Unknown=0, NotChecked=0, Total=17556 [2020-04-18 16:02:20,506 INFO L87 Difference]: Start difference. First operand 3999 states and 8083 transitions. Second operand 38 states. [2020-04-18 16:02:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:27,454 INFO L93 Difference]: Finished difference Result 6446 states and 13098 transitions. [2020-04-18 16:02:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6446 states and 13098 transitions. [2020-04-18 16:02:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:27,462 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 16:02:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 17 times [2020-04-18 16:02:27,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:27,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887368644] [2020-04-18 16:02:27,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:27,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887368644] [2020-04-18 16:02:27,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418843923] [2020-04-18 16:02:27,690 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:27,728 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-18 16:02:27,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:27,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:27,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:27,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:27,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:27,737 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:27,741 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:27,756 INFO L259 McrAutomatonBuilder]: Finished intersection with 130 states and 230 transitions. [2020-04-18 16:02:27,756 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:28,279 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 52 times. [2020-04-18 16:02:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-04-18 16:02:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5836, Invalid=24266, Unknown=0, NotChecked=0, Total=30102 [2020-04-18 16:02:28,282 INFO L87 Difference]: Start difference. First operand 6446 states and 13098 transitions. Second operand 46 states. [2020-04-18 16:02:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:36,200 INFO L93 Difference]: Finished difference Result 9616 states and 19675 transitions. [2020-04-18 16:02:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 19675 transitions. [2020-04-18 16:02:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:36,212 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 16:02:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 18 times [2020-04-18 16:02:36,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:36,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125010177] [2020-04-18 16:02:36,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 16:02:36,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125010177] [2020-04-18 16:02:36,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129895725] [2020-04-18 16:02:36,431 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:36,498 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-18 16:02:36,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:36,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 16:02:36,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 16:02:36,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:36,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-18 16:02:36,509 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:36,513 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:36,538 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 172 transitions. [2020-04-18 16:02:36,538 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:36,704 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 16:02:36,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 16:02:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8316, Invalid=34740, Unknown=0, NotChecked=0, Total=43056 [2020-04-18 16:02:36,709 INFO L87 Difference]: Start difference. First operand 9616 states and 19675 transitions. Second operand 21 states. [2020-04-18 16:02:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:38,795 INFO L93 Difference]: Finished difference Result 11733 states and 23613 transitions. [2020-04-18 16:02:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11733 states and 23613 transitions. [2020-04-18 16:02:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:38,809 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 16:02:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 19 times [2020-04-18 16:02:38,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:38,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296256247] [2020-04-18 16:02:38,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:02:38,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296256247] [2020-04-18 16:02:38,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446227033] [2020-04-18 16:02:38,946 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:38,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 16:02:38,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:02:38,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:38,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-18 16:02:38,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:38,996 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:39,010 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 170 transitions. [2020-04-18 16:02:39,010 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:39,058 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 20 times. [2020-04-18 16:02:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 16:02:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=44519, Unknown=0, NotChecked=0, Total=54522 [2020-04-18 16:02:39,061 INFO L87 Difference]: Start difference. First operand 11733 states and 23613 transitions. Second operand 19 states. [2020-04-18 16:02:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:41,239 INFO L93 Difference]: Finished difference Result 15993 states and 31585 transitions. [2020-04-18 16:02:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15993 states and 31585 transitions. [2020-04-18 16:02:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:41,258 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 16:02:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 20 times [2020-04-18 16:02:41,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:41,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331576263] [2020-04-18 16:02:41,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 16:02:41,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331576263] [2020-04-18 16:02:41,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565731954] [2020-04-18 16:02:41,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:41,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:02:41,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:41,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 16:02:41,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 16:02:41,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:41,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-18 16:02:41,442 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:41,446 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:41,462 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 168 transitions. [2020-04-18 16:02:41,463 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:41,515 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 16:02:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 16:02:41,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12001, Invalid=55859, Unknown=0, NotChecked=0, Total=67860 [2020-04-18 16:02:41,519 INFO L87 Difference]: Start difference. First operand 15993 states and 31585 transitions. Second operand 17 states. [2020-04-18 16:02:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:43,423 INFO L93 Difference]: Finished difference Result 22313 states and 43803 transitions. [2020-04-18 16:02:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22313 states and 43803 transitions. [2020-04-18 16:02:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:43,441 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 16:02:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 21 times [2020-04-18 16:02:43,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:43,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902310790] [2020-04-18 16:02:43,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-04-18 16:02:43,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902310790] [2020-04-18 16:02:43,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888210543] [2020-04-18 16:02:43,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:43,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-18 16:02:43,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:43,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 16:02:43,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-04-18 16:02:43,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:43,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-18 16:02:43,593 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:43,596 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:43,608 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 166 transitions. [2020-04-18 16:02:43,608 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:43,662 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 16:02:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 16:02:43,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14274, Invalid=67808, Unknown=0, NotChecked=0, Total=82082 [2020-04-18 16:02:43,667 INFO L87 Difference]: Start difference. First operand 22313 states and 43803 transitions. Second operand 15 states. [2020-04-18 16:02:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:45,282 INFO L93 Difference]: Finished difference Result 26023 states and 50952 transitions. [2020-04-18 16:02:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 26023 states and 50952 transitions. [2020-04-18 16:02:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:45,304 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 16:02:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 22 times [2020-04-18 16:02:45,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:45,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186303338] [2020-04-18 16:02:45,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:45,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186303338] [2020-04-18 16:02:45,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949309229] [2020-04-18 16:02:45,477 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:45,514 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:02:45,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:45,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:45,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:45,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:45,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:45,522 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:45,526 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:45,547 INFO L259 McrAutomatonBuilder]: Finished intersection with 140 states and 251 transitions. [2020-04-18 16:02:45,548 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:46,083 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 63 times. [2020-04-18 16:02:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-04-18 16:02:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17982, Invalid=84738, Unknown=0, NotChecked=0, Total=102720 [2020-04-18 16:02:46,089 INFO L87 Difference]: Start difference. First operand 26023 states and 50952 transitions. Second operand 54 states. [2020-04-18 16:02:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:57,974 INFO L93 Difference]: Finished difference Result 27060 states and 52792 transitions. [2020-04-18 16:02:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27060 states and 52792 transitions. [2020-04-18 16:02:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:58,001 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 16:02:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 23 times [2020-04-18 16:02:58,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:58,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337481802] [2020-04-18 16:02:58,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:58,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337481802] [2020-04-18 16:02:58,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408194330] [2020-04-18 16:02:58,159 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:58,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-18 16:02:58,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:58,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:58,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:58,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:58,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:58,207 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:58,210 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:58,221 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 159 transitions. [2020-04-18 16:02:58,221 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:58,224 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:02:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 16:02:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21847, Invalid=111013, Unknown=0, NotChecked=0, Total=132860 [2020-04-18 16:02:58,231 INFO L87 Difference]: Start difference. First operand 27060 states and 52792 transitions. Second operand 22 states. [2020-04-18 16:02:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:02:59,325 INFO L93 Difference]: Finished difference Result 28232 states and 55032 transitions. [2020-04-18 16:02:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 28232 states and 55032 transitions. [2020-04-18 16:02:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:02:59,346 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 16:02:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:02:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 24 times [2020-04-18 16:02:59,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:02:59,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772816812] [2020-04-18 16:02:59,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:02:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:02:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:59,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772816812] [2020-04-18 16:02:59,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767774520] [2020-04-18 16:02:59,587 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:02:59,636 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-18 16:02:59,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:02:59,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:02:59,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:02:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:02:59,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:02:59,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:02:59,646 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:02:59,651 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:02:59,666 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 161 transitions. [2020-04-18 16:02:59,666 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:02:59,670 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:02:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 16:02:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22830, Invalid=113700, Unknown=0, NotChecked=0, Total=136530 [2020-04-18 16:02:59,678 INFO L87 Difference]: Start difference. First operand 28232 states and 55032 transitions. Second operand 22 states. [2020-04-18 16:03:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:01,017 INFO L93 Difference]: Finished difference Result 30090 states and 58757 transitions. [2020-04-18 16:03:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 30090 states and 58757 transitions. [2020-04-18 16:03:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:03:01,041 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 16:03:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:03:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 25 times [2020-04-18 16:03:01,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:03:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144179720] [2020-04-18 16:03:01,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:03:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:01,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144179720] [2020-04-18 16:03:01,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748707204] [2020-04-18 16:03:01,217 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:01,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:03:01,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:03:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:01,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:03:01,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:03:01,261 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:03:01,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:03:01,279 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 163 transitions. [2020-04-18 16:03:01,279 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:03:01,282 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:03:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 16:03:01,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24369, Invalid=118137, Unknown=0, NotChecked=0, Total=142506 [2020-04-18 16:03:01,289 INFO L87 Difference]: Start difference. First operand 30090 states and 58757 transitions. Second operand 22 states. [2020-04-18 16:03:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:02,638 INFO L93 Difference]: Finished difference Result 32627 states and 63990 transitions. [2020-04-18 16:03:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 32627 states and 63990 transitions. [2020-04-18 16:03:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:03:02,662 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 16:03:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:03:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 26 times [2020-04-18 16:03:02,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:03:02,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615432977] [2020-04-18 16:03:02,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:03:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:02,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615432977] [2020-04-18 16:03:02,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138707014] [2020-04-18 16:03:02,848 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:02,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:03:02,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:03:02,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:03:02,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:03:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:02,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:03:02,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-18 16:03:02,894 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:03:02,897 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:03:02,908 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 165 transitions. [2020-04-18 16:03:02,908 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:03:02,911 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:03:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 16:03:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26316, Invalid=124616, Unknown=0, NotChecked=0, Total=150932 [2020-04-18 16:03:02,919 INFO L87 Difference]: Start difference. First operand 32627 states and 63990 transitions. Second operand 22 states. [2020-04-18 16:03:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:04,639 INFO L93 Difference]: Finished difference Result 35125 states and 69071 transitions. [2020-04-18 16:03:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 35125 states and 69071 transitions. [2020-04-18 16:03:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:03:04,665 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 16:03:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:03:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 27 times [2020-04-18 16:03:04,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:03:04,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891179327] [2020-04-18 16:03:04,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:03:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:04,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891179327] [2020-04-18 16:03:04,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521901637] [2020-04-18 16:03:04,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:04,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-18 16:03:04,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:03:04,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 16:03:04,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:03:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 16:03:04,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:03:04,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-18 16:03:04,853 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:03:04,857 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:03:04,871 INFO L259 McrAutomatonBuilder]: Finished intersection with 114 states and 198 transitions. [2020-04-18 16:03:04,871 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:03:04,874 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:03:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 16:03:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28324, Invalid=133682, Unknown=0, NotChecked=0, Total=162006 [2020-04-18 16:03:04,880 INFO L87 Difference]: Start difference. First operand 35125 states and 69071 transitions. Second operand 21 states. [2020-04-18 16:03:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:06,386 INFO L93 Difference]: Finished difference Result 38732 states and 75654 transitions. [2020-04-18 16:03:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38732 states and 75654 transitions. [2020-04-18 16:03:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:03:06,414 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 16:03:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:03:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 28 times [2020-04-18 16:03:06,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:03:06,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897804144] [2020-04-18 16:03:06,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:03:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 16:03:06,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897804144] [2020-04-18 16:03:06,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536896997] [2020-04-18 16:03:06,540 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:06,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:03:06,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:03:06,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 16:03:06,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:03:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 16:03:06,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:03:06,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-18 16:03:06,582 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:03:06,584 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:03:06,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 139 states and 240 transitions. [2020-04-18 16:03:06,600 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:03:06,669 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 25 times. [2020-04-18 16:03:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 16:03:06,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29367, Invalid=139965, Unknown=0, NotChecked=0, Total=169332 [2020-04-18 16:03:06,677 INFO L87 Difference]: Start difference. First operand 38732 states and 75654 transitions. Second operand 21 states. [2020-04-18 16:03:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:08,301 INFO L93 Difference]: Finished difference Result 44570 states and 87021 transitions. [2020-04-18 16:03:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 44570 states and 87021 transitions. [2020-04-18 16:03:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 16:03:08,333 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 16:03:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:03:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 29 times [2020-04-18 16:03:08,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:03:08,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304270511] [2020-04-18 16:03:08,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:03:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:03:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:03:08,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304270511] [2020-04-18 16:03:08,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141656577] [2020-04-18 16:03:08,466 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:08,513 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-18 16:03:08,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:03:08,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 16:03:08,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:03:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:03:08,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:03:08,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-18 16:03:08,522 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:03:08,527 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:03:08,559 INFO L259 McrAutomatonBuilder]: Finished intersection with 164 states and 282 transitions. [2020-04-18 16:03:08,560 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:03:08,565 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 16:03:08,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 16:03:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31113, Invalid=149937, Unknown=0, NotChecked=0, Total=181050 [2020-04-18 16:03:08,578 INFO L87 Difference]: Start difference. First operand 44570 states and 87021 transitions. Second operand 19 states. [2020-04-18 16:03:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:03:09,975 INFO L93 Difference]: Finished difference Result 48369 states and 94492 transitions. [2020-04-18 16:03:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 48369 states and 94492 transitions. [2020-04-18 16:03:10,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:03:10,011 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1597063759] [2020-04-18 16:03:10,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:03:10,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 16:03:10,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1597063759] [2020-04-18 16:03:10,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-04-18 16:03:10,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:03:10,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-04-18 16:03:10,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32292, Invalid=155630, Unknown=0, NotChecked=0, Total=187922 [2020-04-18 16:03:10,020 INFO L87 Difference]: Start difference. First operand 544 states and 1316 transitions. Second operand 74 states. [2020-04-18 16:03:14,619 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 31 Received shutdown request... [2020-04-18 16:03:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-04-18 16:03:19,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:03:19,952 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 16:03:19,957 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 16:03:19,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 04:03:19 BasicIcfg [2020-04-18 16:03:19,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 16:03:19,959 INFO L168 Benchmark]: Toolchain (without parser) took 255204.75 ms. Allocated memory was 138.4 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 101.5 MB in the beginning and 714.5 MB in the end (delta: -613.0 MB). Peak memory consumption was 682.0 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,959 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 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. [2020-04-18 16:03:19,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.03 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 180.1 MB in the end (delta: -80.6 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,960 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.74 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 178.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,960 INFO L168 Benchmark]: Boogie Preprocessor took 21.01 ms. Allocated memory is still 202.9 MB. Free memory was 178.7 MB in the beginning and 177.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,961 INFO L168 Benchmark]: RCFGBuilder took 371.65 ms. Allocated memory is still 202.9 MB. Free memory was 177.3 MB in the beginning and 161.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,961 INFO L168 Benchmark]: TraceAbstraction took 254378.05 ms. Allocated memory was 202.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 160.4 MB in the beginning and 714.5 MB in the end (delta: -554.1 MB). Peak memory consumption was 676.4 MB. Max. memory is 7.1 GB. [2020-04-18 16:03:19,963 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 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 379.03 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 180.1 MB in the end (delta: -80.6 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 30.74 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 178.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.01 ms. Allocated memory is still 202.9 MB. Free memory was 178.7 MB in the beginning and 177.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.65 ms. Allocated memory is still 202.9 MB. Free memory was 177.3 MB in the beginning and 161.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254378.05 ms. Allocated memory was 202.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 160.4 MB in the beginning and 714.5 MB in the end (delta: -554.1 MB). Peak memory consumption was 676.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.8s, 57 ProgramPointsBefore, 27 ProgramPointsAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 235 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 426 CheckedPairsTotal, 32 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (544states) and FLOYD_HOARE automaton (currently 110 states, 74 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 502 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 254.2s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 71.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 444 SDtfs, 7922 SDslu, 5185 SDs, 0 SdLazy, 12528 SolverSat, 5189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6813 GetRequests, 4578 SyntacticMatches, 21 SemanticMatches, 2213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378256 ImplicationChecksByTransitivity, 110.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=579occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 4795 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown