/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 23:33:14,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 23:33:14,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 23:33:14,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 23:33:14,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 23:33:14,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 23:33:14,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 23:33:14,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 23:33:14,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 23:33:14,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 23:33:14,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 23:33:14,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 23:33:14,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 23:33:14,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 23:33:14,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 23:33:14,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 23:33:14,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 23:33:14,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 23:33:14,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 23:33:14,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 23:33:14,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 23:33:14,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 23:33:14,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 23:33:14,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 23:33:14,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-21 23:33:14,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 23:33:14,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 23:33:14,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 23:33:14,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 23:33:14,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 23:33:14,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 23:33:14,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 23:33:14,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 23:33:14,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 23:33:14,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 23:33:14,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 23:33:14,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-21 23:33:14,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 23:33:14,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 23:33:14,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 23:33:14,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 23:33:14,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 23:33:14,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 23:33:14,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 23:33:14,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 23:33:14,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 23:33:14,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 23:33:14,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 23:33:14,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 23:33:14,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 23:33:14,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 23:33:14,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 23:33:14,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 23:33:14,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 23:33:14,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 23:33:14,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 23:33:14,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 23:33:14,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 23:33:14,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 23:33:14,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 23:33:14,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 23:33:14,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 23:33:14,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 23:33:14,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 23:33:14,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 23:33:14,826 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 23:33:14,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-21 23:33:14,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf26e40c/1cee4602ba0b45c58badadc7f1fab6e4/FLAG9b43aacdc [2020-10-21 23:33:15,331 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 23:33:15,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-21 23:33:15,332 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-21 23:33:15,333 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-21 23:33:15,333 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-21 23:33:15,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf26e40c/1cee4602ba0b45c58badadc7f1fab6e4/FLAG9b43aacdc [2020-10-21 23:33:15,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf26e40c/1cee4602ba0b45c58badadc7f1fab6e4 [2020-10-21 23:33:15,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 23:33:15,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 23:33:15,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 23:33:15,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 23:33:15,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 23:33:15,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:33:15" (1/1) ... [2020-10-21 23:33:15,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac718b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:15, skipping insertion in model container [2020-10-21 23:33:15,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:33:15" (1/1) ... [2020-10-21 23:33:15,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 23:33:15,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 23:33:16,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:33:16,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 23:33:16,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:33:16,146 INFO L208 MainTranslator]: Completed translation [2020-10-21 23:33:16,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16 WrapperNode [2020-10-21 23:33:16,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 23:33:16,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 23:33:16,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 23:33:16,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 23:33:16,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 23:33:16,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 23:33:16,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 23:33:16,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 23:33:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (1/1) ... [2020-10-21 23:33:16,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 23:33:16,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 23:33:16,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 23:33:16,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 23:33:16,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (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 [2020-10-21 23:33:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 23:33:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 23:33:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 23:33:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-21 23:33:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-21 23:33:16,272 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-21 23:33:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-21 23:33:16,272 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-21 23:33:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 23:33:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 23:33:16,274 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 23:33:16,525 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 23:33:16,526 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-21 23:33:16,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:33:16 BoogieIcfgContainer [2020-10-21 23:33:16,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 23:33:16,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 23:33:16,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 23:33:16,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 23:33:16,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 11:33:15" (1/3) ... [2020-10-21 23:33:16,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e5c6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:33:16, skipping insertion in model container [2020-10-21 23:33:16,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:33:16" (2/3) ... [2020-10-21 23:33:16,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e5c6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:33:16, skipping insertion in model container [2020-10-21 23:33:16,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:33:16" (3/3) ... [2020-10-21 23:33:16,537 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-21 23:33:16,551 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 23:33:16,551 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 23:33:16,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 23:33:16,561 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 23:33:16,636 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,637 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,640 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,641 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,641 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,641 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,642 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,645 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,646 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,646 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,646 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,647 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,647 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,647 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,648 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,650 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,651 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,651 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,651 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,652 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,658 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,659 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,663 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,663 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,664 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,664 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,664 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,687 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,688 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,688 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,688 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,688 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:33:16,713 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-21 23:33:16,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 23:33:16,750 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 23:33:16,750 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 23:33:16,750 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 23:33:16,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 23:33:16,751 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 23:33:16,751 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 23:33:16,751 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 23:33:16,751 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 23:33:16,766 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 23:33:16,767 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-21 23:33:16,770 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-21 23:33:16,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-21 23:33:16,817 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-21 23:33:16,817 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-21 23:33:16,831 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-21 23:33:16,834 INFO L116 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-21 23:33:17,544 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-21 23:33:17,599 INFO L131 LiptonReduction]: Checked pairs total: 866 [2020-10-21 23:33:17,600 INFO L133 LiptonReduction]: Total number of compositions: 34 [2020-10-21 23:33:17,607 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-21 23:33:17,621 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-21 23:33:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-21 23:33:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 23:33:17,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:17,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:17,634 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-21 23:33:17,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:17,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935627394] [2020-10-21 23:33:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:17,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935627394] [2020-10-21 23:33:17,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:33:17,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 23:33:17,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412894615] [2020-10-21 23:33:17,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-21 23:33:17,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-21 23:33:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 23:33:17,839 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-10-21 23:33:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:17,884 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-10-21 23:33:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-21 23:33:17,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-21 23:33:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:17,910 INFO L225 Difference]: With dead ends: 96 [2020-10-21 23:33:17,911 INFO L226 Difference]: Without dead ends: 95 [2020-10-21 23:33:17,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-21 23:33:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-21 23:33:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-21 23:33:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 23:33:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-10-21 23:33:17,966 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-10-21 23:33:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:17,967 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-10-21 23:33:17,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-21 23:33:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-10-21 23:33:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 23:33:17,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:17,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:17,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 23:33:17,970 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-10-21 23:33:17,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:17,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818338702] [2020-10-21 23:33:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:18,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818338702] [2020-10-21 23:33:18,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557445733] [2020-10-21 23:33:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-21 23:33:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:18,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 23:33:18,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-21 23:33:18,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147184825] [2020-10-21 23:33:18,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-21 23:33:18,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-21 23:33:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:33:18,159 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 3 states. [2020-10-21 23:33:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:18,186 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2020-10-21 23:33:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-21 23:33:18,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-21 23:33:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:18,190 INFO L225 Difference]: With dead ends: 108 [2020-10-21 23:33:18,190 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 23:33:18,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:33:18,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 23:33:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-21 23:33:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 23:33:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 211 transitions. [2020-10-21 23:33:18,224 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 211 transitions. Word has length 17 [2020-10-21 23:33:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:18,225 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 211 transitions. [2020-10-21 23:33:18,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-21 23:33:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 211 transitions. [2020-10-21 23:33:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 23:33:18,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:18,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:18,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-21 23:33:18,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1653958726, now seen corresponding path program 1 times [2020-10-21 23:33:18,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:18,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233330231] [2020-10-21 23:33:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:18,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233330231] [2020-10-21 23:33:18,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332704183] [2020-10-21 23:33:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:18,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-21 23:33:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:18,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:18,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-21 23:33:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127041281] [2020-10-21 23:33:18,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:33:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:33:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:33:18,579 INFO L87 Difference]: Start difference. First operand 95 states and 211 transitions. Second operand 6 states. [2020-10-21 23:33:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:18,689 INFO L93 Difference]: Finished difference Result 197 states and 454 transitions. [2020-10-21 23:33:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-21 23:33:18,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-21 23:33:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:18,692 INFO L225 Difference]: With dead ends: 197 [2020-10-21 23:33:18,693 INFO L226 Difference]: Without dead ends: 197 [2020-10-21 23:33:18,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:33:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-21 23:33:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-10-21 23:33:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-21 23:33:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-21 23:33:18,710 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 19 [2020-10-21 23:33:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:18,711 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-21 23:33:18,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:33:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-21 23:33:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 23:33:18,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:18,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:18,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:18,927 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-21 23:33:18,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:18,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631009504] [2020-10-21 23:33:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631009504] [2020-10-21 23:33:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788669064] [2020-10-21 23:33:18,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:19,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:33:19,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-21 23:33:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:19,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:19,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:33:19,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573500031] [2020-10-21 23:33:19,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:33:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:33:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:33:19,086 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 6 states. [2020-10-21 23:33:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:19,119 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-21 23:33:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 23:33:19,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-21 23:33:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:19,123 INFO L225 Difference]: With dead ends: 210 [2020-10-21 23:33:19,123 INFO L226 Difference]: Without dead ends: 210 [2020-10-21 23:33:19,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:33:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-21 23:33:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-21 23:33:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-21 23:33:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-21 23:33:19,142 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-21 23:33:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-21 23:33:19,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:33:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-21 23:33:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 23:33:19,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:19,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:19,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:19,360 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-21 23:33:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:19,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114267170] [2020-10-21 23:33:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:19,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114267170] [2020-10-21 23:33:19,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740655644] [2020-10-21 23:33:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:19,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 23:33:19,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-21 23:33:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:19,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:19,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:33:19,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316856740] [2020-10-21 23:33:19,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:33:19,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:33:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:33:19,595 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 7 states. [2020-10-21 23:33:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:19,627 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-21 23:33:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-21 23:33:19,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-21 23:33:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:19,630 INFO L225 Difference]: With dead ends: 244 [2020-10-21 23:33:19,631 INFO L226 Difference]: Without dead ends: 244 [2020-10-21 23:33:19,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:33:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-21 23:33:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-21 23:33:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-21 23:33:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-21 23:33:19,647 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-21 23:33:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:19,647 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-21 23:33:19,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:33:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-21 23:33:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 23:33:19,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:19,650 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:19,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:19,866 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-21 23:33:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:19,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468241384] [2020-10-21 23:33:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468241384] [2020-10-21 23:33:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278604600] [2020-10-21 23:33:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:19,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:33:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-21 23:33:19,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:20,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:20,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:33:20,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034931840] [2020-10-21 23:33:20,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:33:20,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:33:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:33:20,012 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 8 states. [2020-10-21 23:33:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:20,042 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-21 23:33:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:33:20,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-21 23:33:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:20,045 INFO L225 Difference]: With dead ends: 261 [2020-10-21 23:33:20,045 INFO L226 Difference]: Without dead ends: 261 [2020-10-21 23:33:20,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:33:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-21 23:33:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-21 23:33:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-21 23:33:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-21 23:33:20,058 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-21 23:33:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:20,058 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-21 23:33:20,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:33:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-21 23:33:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 23:33:20,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:20,061 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:20,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 23:33:20,275 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-21 23:33:20,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:20,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675881037] [2020-10-21 23:33:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:20,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675881037] [2020-10-21 23:33:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105733970] [2020-10-21 23:33:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:20,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-21 23:33:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-21 23:33:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:20,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:20,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:33:20,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329553467] [2020-10-21 23:33:20,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:33:20,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:33:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:33:20,442 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 6 states. [2020-10-21 23:33:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:20,475 INFO L93 Difference]: Finished difference Result 354 states and 834 transitions. [2020-10-21 23:33:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 23:33:20,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-21 23:33:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:20,479 INFO L225 Difference]: With dead ends: 354 [2020-10-21 23:33:20,479 INFO L226 Difference]: Without dead ends: 354 [2020-10-21 23:33:20,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:33:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-21 23:33:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2020-10-21 23:33:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-21 23:33:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 759 transitions. [2020-10-21 23:33:20,492 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 759 transitions. Word has length 29 [2020-10-21 23:33:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:20,492 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 759 transitions. [2020-10-21 23:33:20,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:33:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 759 transitions. [2020-10-21 23:33:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 23:33:20,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:20,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:20,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:20,703 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 827854074, now seen corresponding path program 6 times [2020-10-21 23:33:20,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:20,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631561911] [2020-10-21 23:33:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:20,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631561911] [2020-10-21 23:33:20,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435232748] [2020-10-21 23:33:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:20,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 23:33:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-21 23:33:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:20,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:20,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:33:20,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727226613] [2020-10-21 23:33:20,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:33:20,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:33:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:33:20,895 INFO L87 Difference]: Start difference. First operand 323 states and 759 transitions. Second operand 7 states. [2020-10-21 23:33:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:20,921 INFO L93 Difference]: Finished difference Result 416 states and 984 transitions. [2020-10-21 23:33:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-21 23:33:20,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-21 23:33:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:20,924 INFO L225 Difference]: With dead ends: 416 [2020-10-21 23:33:20,925 INFO L226 Difference]: Without dead ends: 416 [2020-10-21 23:33:20,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:33:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-21 23:33:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 385. [2020-10-21 23:33:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-21 23:33:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 909 transitions. [2020-10-21 23:33:20,938 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 909 transitions. Word has length 31 [2020-10-21 23:33:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:20,938 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 909 transitions. [2020-10-21 23:33:20,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:33:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 909 transitions. [2020-10-21 23:33:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 23:33:20,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:20,940 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:21,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:21,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 7 times [2020-10-21 23:33:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:21,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463973349] [2020-10-21 23:33:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:21,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463973349] [2020-10-21 23:33:21,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856568775] [2020-10-21 23:33:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-21 23:33:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-21 23:33:21,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:33:21,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862242921] [2020-10-21 23:33:21,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:33:21,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:33:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:33:21,309 INFO L87 Difference]: Start difference. First operand 385 states and 909 transitions. Second operand 8 states. [2020-10-21 23:33:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:21,343 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-21 23:33:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:33:21,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-21 23:33:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:21,347 INFO L225 Difference]: With dead ends: 447 [2020-10-21 23:33:21,347 INFO L226 Difference]: Without dead ends: 447 [2020-10-21 23:33:21,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:33:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-21 23:33:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-21 23:33:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-21 23:33:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-21 23:33:21,362 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-10-21 23:33:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:21,362 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-21 23:33:21,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:33:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-21 23:33:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:21,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:21,364 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:21,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-21 23:33:21,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 8 times [2020-10-21 23:33:21,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:21,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353773412] [2020-10-21 23:33:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:21,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353773412] [2020-10-21 23:33:21,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114007407] [2020-10-21 23:33:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:21,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:33:21,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:33:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:22,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 23:33:22,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-21 23:33:22,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016372761] [2020-10-21 23:33:22,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:22,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:33:22,051 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-21 23:33:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:22,863 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-21 23:33:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:33:22,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:22,870 INFO L225 Difference]: With dead ends: 1728 [2020-10-21 23:33:22,871 INFO L226 Difference]: Without dead ends: 876 [2020-10-21 23:33:22,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 23:33:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-21 23:33:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-21 23:33:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-21 23:33:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-21 23:33:22,892 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-21 23:33:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:22,893 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-21 23:33:22,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-21 23:33:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:22,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:22,895 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:23,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:23,109 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 9 times [2020-10-21 23:33:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:23,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473656061] [2020-10-21 23:33:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:23,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473656061] [2020-10-21 23:33:23,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203747545] [2020-10-21 23:33:23,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:23,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 23:33:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:23,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:23,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:23,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053317213] [2020-10-21 23:33:23,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:23,483 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-10-21 23:33:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:24,180 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-21 23:33:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 23:33:24,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:24,186 INFO L225 Difference]: With dead ends: 1731 [2020-10-21 23:33:24,187 INFO L226 Difference]: Without dead ends: 816 [2020-10-21 23:33:24,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 23:33:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-21 23:33:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-21 23:33:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-21 23:33:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-21 23:33:24,206 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-21 23:33:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:24,206 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-21 23:33:24,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-21 23:33:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:24,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:24,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:24,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:24,422 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:24,423 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 10 times [2020-10-21 23:33:24,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:24,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408133443] [2020-10-21 23:33:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408133443] [2020-10-21 23:33:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213204061] [2020-10-21 23:33:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:24,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:33:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:24,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:24,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:24,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236616654] [2020-10-21 23:33:24,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:24,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:24,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:24,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:24,767 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-10-21 23:33:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:25,394 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-21 23:33:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:33:25,395 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:25,400 INFO L225 Difference]: With dead ends: 2131 [2020-10-21 23:33:25,400 INFO L226 Difference]: Without dead ends: 792 [2020-10-21 23:33:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 23:33:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-21 23:33:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-21 23:33:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-21 23:33:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-21 23:33:25,418 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-21 23:33:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:25,418 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-21 23:33:25,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-21 23:33:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:25,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:25,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:25,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-21 23:33:25,634 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 11 times [2020-10-21 23:33:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:25,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458154310] [2020-10-21 23:33:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458154310] [2020-10-21 23:33:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886231143] [2020-10-21 23:33:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:25,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-21 23:33:25,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:26,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:26,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183743491] [2020-10-21 23:33:26,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:26,003 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-10-21 23:33:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:26,706 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-21 23:33:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:33:26,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:26,712 INFO L225 Difference]: With dead ends: 2670 [2020-10-21 23:33:26,712 INFO L226 Difference]: Without dead ends: 768 [2020-10-21 23:33:26,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 23:33:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-21 23:33:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-21 23:33:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-21 23:33:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-21 23:33:26,733 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-21 23:33:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:26,733 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-21 23:33:26,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-21 23:33:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:26,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:26,736 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:26,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 23:33:26,951 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 12 times [2020-10-21 23:33:26,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:26,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650515838] [2020-10-21 23:33:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:27,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650515838] [2020-10-21 23:33:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250667532] [2020-10-21 23:33:27,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:27,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 23:33:27,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:27,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:27,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:27,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787637087] [2020-10-21 23:33:27,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:27,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:27,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:27,286 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-10-21 23:33:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:28,168 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-10-21 23:33:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 23:33:28,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:28,183 INFO L225 Difference]: With dead ends: 3250 [2020-10-21 23:33:28,184 INFO L226 Difference]: Without dead ends: 2437 [2020-10-21 23:33:28,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-10-21 23:33:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-21 23:33:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-10-21 23:33:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-21 23:33:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-10-21 23:33:28,231 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-10-21 23:33:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:28,232 INFO L481 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-10-21 23:33:28,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-10-21 23:33:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:28,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:28,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:28,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-21 23:33:28,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 13 times [2020-10-21 23:33:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:28,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699460794] [2020-10-21 23:33:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699460794] [2020-10-21 23:33:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765957049] [2020-10-21 23:33:28,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:28,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 23:33:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:28,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:28,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-21 23:33:28,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809341766] [2020-10-21 23:33:28,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:33:28,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:33:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:33:28,747 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-10-21 23:33:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:29,534 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-10-21 23:33:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:33:29,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-21 23:33:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:29,548 INFO L225 Difference]: With dead ends: 2721 [2020-10-21 23:33:29,548 INFO L226 Difference]: Without dead ends: 2040 [2020-10-21 23:33:29,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=690, Invalid=1860, Unknown=0, NotChecked=0, Total=2550 [2020-10-21 23:33:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-10-21 23:33:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-10-21 23:33:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-21 23:33:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-10-21 23:33:29,586 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-10-21 23:33:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:29,587 INFO L481 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-10-21 23:33:29,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:33:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-10-21 23:33:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:29,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:29,591 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:29,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:29,803 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 14 times [2020-10-21 23:33:29,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:29,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038220029] [2020-10-21 23:33:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038220029] [2020-10-21 23:33:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959019840] [2020-10-21 23:33:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:30,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:33:30,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 23:33:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:30,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:30,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-21 23:33:30,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409639161] [2020-10-21 23:33:30,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:33:30,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:33:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:33:30,065 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-10-21 23:33:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:30,689 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-10-21 23:33:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-21 23:33:30,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-21 23:33:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:30,699 INFO L225 Difference]: With dead ends: 2550 [2020-10-21 23:33:30,699 INFO L226 Difference]: Without dead ends: 1781 [2020-10-21 23:33:30,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 23:33:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-21 23:33:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-10-21 23:33:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-10-21 23:33:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-10-21 23:33:30,729 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-10-21 23:33:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:30,729 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-10-21 23:33:30,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:33:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-10-21 23:33:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:30,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:30,732 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:30,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 23:33:30,948 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 15 times [2020-10-21 23:33:30,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:30,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948280686] [2020-10-21 23:33:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-21 23:33:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948280686] [2020-10-21 23:33:31,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896197653] [2020-10-21 23:33:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:31,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 23:33:31,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:33:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-21 23:33:31,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:31,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-21 23:33:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140210886] [2020-10-21 23:33:31,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:33:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:33:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:33:31,152 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-10-21 23:33:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:31,607 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-10-21 23:33:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 23:33:31,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-21 23:33:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:31,616 INFO L225 Difference]: With dead ends: 2371 [2020-10-21 23:33:31,616 INFO L226 Difference]: Without dead ends: 1444 [2020-10-21 23:33:31,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:33:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-21 23:33:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-10-21 23:33:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-21 23:33:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-10-21 23:33:31,639 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-10-21 23:33:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:31,640 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-10-21 23:33:31,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:33:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-10-21 23:33:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:31,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:31,642 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:31,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 23:33:31,856 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:31,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 16 times [2020-10-21 23:33:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:31,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314421224] [2020-10-21 23:33:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-21 23:33:31,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314421224] [2020-10-21 23:33:31,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842487506] [2020-10-21 23:33:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:32,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:33:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:33:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-21 23:33:32,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:32,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-21 23:33:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051315458] [2020-10-21 23:33:32,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:33:32,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:33:32,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:33:32,051 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-10-21 23:33:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:32,397 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-10-21 23:33:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 23:33:32,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-21 23:33:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:32,403 INFO L225 Difference]: With dead ends: 1669 [2020-10-21 23:33:32,404 INFO L226 Difference]: Without dead ends: 744 [2020-10-21 23:33:32,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-21 23:33:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-21 23:33:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-10-21 23:33:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-21 23:33:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-21 23:33:32,417 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-21 23:33:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:32,417 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-21 23:33:32,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:33:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-21 23:33:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:32,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:32,419 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:32,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 23:33:32,633 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 17 times [2020-10-21 23:33:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:32,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859929424] [2020-10-21 23:33:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:32,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859929424] [2020-10-21 23:33:32,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957839189] [2020-10-21 23:33:32,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:32,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 23:33:32,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:32,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:32,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932447243] [2020-10-21 23:33:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:32,921 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-10-21 23:33:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:33,525 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-21 23:33:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 23:33:33,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:33,531 INFO L225 Difference]: With dead ends: 1734 [2020-10-21 23:33:33,531 INFO L226 Difference]: Without dead ends: 894 [2020-10-21 23:33:33,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 23:33:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-21 23:33:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-21 23:33:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-21 23:33:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-21 23:33:33,574 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-21 23:33:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:33,574 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-21 23:33:33,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-21 23:33:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:33,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:33,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:33,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:33,791 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 18 times [2020-10-21 23:33:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:33,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916979068] [2020-10-21 23:33:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:34,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916979068] [2020-10-21 23:33:34,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836030772] [2020-10-21 23:33:34,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:34,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 23:33:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:34,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:34,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:34,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033856623] [2020-10-21 23:33:34,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:34,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:34,096 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-10-21 23:33:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:34,716 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-21 23:33:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:33:34,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:34,722 INFO L225 Difference]: With dead ends: 1717 [2020-10-21 23:33:34,722 INFO L226 Difference]: Without dead ends: 774 [2020-10-21 23:33:34,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 23:33:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-21 23:33:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-21 23:33:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-21 23:33:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-21 23:33:34,734 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-21 23:33:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:34,734 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-21 23:33:34,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-21 23:33:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:34,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:34,736 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:34,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:34,952 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 19 times [2020-10-21 23:33:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:34,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814936727] [2020-10-21 23:33:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:35,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814936727] [2020-10-21 23:33:35,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413729060] [2020-10-21 23:33:35,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:35,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:35,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:35,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139831911] [2020-10-21 23:33:35,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:35,253 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-10-21 23:33:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:35,914 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-21 23:33:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:33:35,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:35,919 INFO L225 Difference]: With dead ends: 2063 [2020-10-21 23:33:35,920 INFO L226 Difference]: Without dead ends: 716 [2020-10-21 23:33:35,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 23:33:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-21 23:33:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-21 23:33:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-21 23:33:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-21 23:33:35,931 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-21 23:33:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:35,931 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-21 23:33:35,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-21 23:33:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:35,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:35,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:36,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-21 23:33:36,145 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:36,146 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 20 times [2020-10-21 23:33:36,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:36,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812304315] [2020-10-21 23:33:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812304315] [2020-10-21 23:33:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762764955] [2020-10-21 23:33:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:36,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:33:36,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:36,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:36,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:36,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858722582] [2020-10-21 23:33:36,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:36,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:36,415 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-10-21 23:33:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:37,054 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-21 23:33:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:33:37,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:37,058 INFO L225 Difference]: With dead ends: 2541 [2020-10-21 23:33:37,059 INFO L226 Difference]: Without dead ends: 658 [2020-10-21 23:33:37,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 23:33:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-21 23:33:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-21 23:33:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-21 23:33:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-21 23:33:37,070 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-21 23:33:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:37,071 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-21 23:33:37,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-21 23:33:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:37,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:37,072 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:37,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 23:33:37,287 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 21 times [2020-10-21 23:33:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:37,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150646692] [2020-10-21 23:33:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:37,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150646692] [2020-10-21 23:33:37,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047360580] [2020-10-21 23:33:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:37,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 23:33:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:33:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:37,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:37,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-21 23:33:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467142606] [2020-10-21 23:33:37,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:33:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:33:37,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:33:37,664 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-10-21 23:33:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:38,473 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-10-21 23:33:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-21 23:33:38,473 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-21 23:33:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:38,482 INFO L225 Difference]: With dead ends: 2473 [2020-10-21 23:33:38,482 INFO L226 Difference]: Without dead ends: 1507 [2020-10-21 23:33:38,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2020-10-21 23:33:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-21 23:33:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-10-21 23:33:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-21 23:33:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-10-21 23:33:38,505 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-10-21 23:33:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:38,505 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-10-21 23:33:38,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:33:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-10-21 23:33:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:38,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:38,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:38,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:38,721 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 22 times [2020-10-21 23:33:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:38,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419618467] [2020-10-21 23:33:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:38,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419618467] [2020-10-21 23:33:38,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148901638] [2020-10-21 23:33:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:38,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:33:38,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:38,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 23:33:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:33:38,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:38,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-21 23:33:38,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035980250] [2020-10-21 23:33:38,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:33:38,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:38,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:33:38,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:33:38,975 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-10-21 23:33:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:39,648 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-10-21 23:33:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:33:39,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-21 23:33:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:39,653 INFO L225 Difference]: With dead ends: 1951 [2020-10-21 23:33:39,654 INFO L226 Difference]: Without dead ends: 1081 [2020-10-21 23:33:39,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 23:33:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-21 23:33:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-10-21 23:33:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-21 23:33:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-10-21 23:33:39,671 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-10-21 23:33:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:39,671 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-10-21 23:33:39,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:33:39,671 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-10-21 23:33:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:39,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:39,673 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:39,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 23:33:39,887 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 23 times [2020-10-21 23:33:39,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:39,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787177739] [2020-10-21 23:33:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:40,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787177739] [2020-10-21 23:33:40,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005304499] [2020-10-21 23:33:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:40,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 23:33:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 23:33:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-21 23:33:40,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:40,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-21 23:33:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339084727] [2020-10-21 23:33:40,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:33:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:33:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:33:40,118 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-10-21 23:33:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:40,660 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-10-21 23:33:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:33:40,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-21 23:33:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:40,664 INFO L225 Difference]: With dead ends: 1790 [2020-10-21 23:33:40,664 INFO L226 Difference]: Without dead ends: 744 [2020-10-21 23:33:40,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 23:33:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-21 23:33:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-10-21 23:33:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-21 23:33:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-10-21 23:33:40,674 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-10-21 23:33:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:40,674 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-10-21 23:33:40,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:33:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-10-21 23:33:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:33:40,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:33:40,675 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:33:40,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:40,876 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-21 23:33:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:33:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 24 times [2020-10-21 23:33:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:33:40,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282676610] [2020-10-21 23:33:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:33:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:33:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:40,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282676610] [2020-10-21 23:33:40,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442365521] [2020-10-21 23:33:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:33:41,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 23:33:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:33:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:33:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:33:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-21 23:33:41,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:33:41,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-21 23:33:41,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111603331] [2020-10-21 23:33:41,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:33:41,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:33:41,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:33:41,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:33:41,091 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-10-21 23:33:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:33:41,517 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-10-21 23:33:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-21 23:33:41,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-21 23:33:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:33:41,518 INFO L225 Difference]: With dead ends: 1084 [2020-10-21 23:33:41,518 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 23:33:41,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:33:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 23:33:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 23:33:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 23:33:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 23:33:41,520 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-21 23:33:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:33:41,520 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 23:33:41,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:33:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 23:33:41,520 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 23:33:41,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 23:33:41,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 11:33:41 BasicIcfg [2020-10-21 23:33:41,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 23:33:41,727 INFO L168 Benchmark]: Toolchain (without parser) took 25954.14 ms. Allocated memory was 140.5 MB in the beginning and 421.0 MB in the end (delta: 280.5 MB). Free memory was 101.4 MB in the beginning and 353.5 MB in the end (delta: -252.0 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,727 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.15 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 100.4 MB in the beginning and 179.9 MB in the end (delta: -79.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.86 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 178.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,728 INFO L168 Benchmark]: Boogie Preprocessor took 21.61 ms. Allocated memory is still 203.4 MB. Free memory was 178.2 MB in the beginning and 176.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,729 INFO L168 Benchmark]: RCFGBuilder took 325.25 ms. Allocated memory is still 203.4 MB. Free memory was 176.8 MB in the beginning and 160.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,729 INFO L168 Benchmark]: TraceAbstraction took 25195.73 ms. Allocated memory was 203.4 MB in the beginning and 421.0 MB in the end (delta: 217.6 MB). Free memory was 159.7 MB in the beginning and 353.5 MB in the end (delta: -193.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-10-21 23:33:41,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.15 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 100.4 MB in the beginning and 179.9 MB in the end (delta: -79.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 32.86 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 178.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.61 ms. Allocated memory is still 203.4 MB. Free memory was 178.2 MB in the beginning and 176.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.25 ms. Allocated memory is still 203.4 MB. Free memory was 176.8 MB in the beginning and 160.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25195.73 ms. Allocated memory was 203.4 MB in the beginning and 421.0 MB in the end (delta: 217.6 MB). Free memory was 159.7 MB in the beginning and 353.5 MB in the end (delta: -193.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 271 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 47 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.8s, 57 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 4 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 34 TotalNumberOfCompositions, 866 MoverChecksTotal - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.9s, OverallIterations: 26, TraceHistogramMax: 5, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 1926 SDtfs, 9011 SDslu, 9317 SDs, 0 SdLazy, 5664 SolverSat, 1140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1525 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 26 MinimizatonAttempts, 7142 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1613 NumberOfCodeBlocks, 1613 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 1562 ConstructedInterpolants, 0 QuantifiedInterpolants, 141580 SizeOfPredicates, 284 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 51 InterpolantComputations, 3 PerfectInterpolantSequences, 1427/1996 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...