/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-22 01:09:03,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-22 01:09:03,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-22 01:09:03,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-22 01:09:03,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-22 01:09:03,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-22 01:09:03,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-22 01:09:03,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-22 01:09:03,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-22 01:09:03,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-22 01:09:03,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-22 01:09:03,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-22 01:09:03,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-22 01:09:03,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-22 01:09:03,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-22 01:09:03,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-22 01:09:03,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-22 01:09:03,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-22 01:09:03,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-22 01:09:03,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-22 01:09:03,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-22 01:09:03,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-22 01:09:03,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-22 01:09:03,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-22 01:09:03,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-22 01:09:03,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-22 01:09:03,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-22 01:09:03,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-22 01:09:03,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-22 01:09:03,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-22 01:09:03,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-22 01:09:03,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-22 01:09:03,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-22 01:09:03,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-22 01:09:03,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-22 01:09:03,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-22 01:09:03,378 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-McrAutomaton-WP.epf [2020-10-22 01:09:03,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-22 01:09:03,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-22 01:09:03,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-22 01:09:03,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-22 01:09:03,416 INFO L138 SettingsManager]: * Use SBE=true [2020-10-22 01:09:03,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-22 01:09:03,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-22 01:09:03,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-22 01:09:03,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-22 01:09:03,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-22 01:09:03,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-22 01:09:03,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-22 01:09:03,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-22 01:09:03,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-22 01:09:03,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-22 01:09:03,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-22 01:09:03,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-22 01:09:03,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-22 01:09:03,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-22 01:09:03,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-22 01:09:03,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-22 01:09:03,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:09:03,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-22 01:09:03,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-22 01:09:03,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-22 01:09:03,421 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-22 01:09:03,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-22 01:09:03,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-22 01:09:03,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-22 01:09:03,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-22 01:09:03,733 INFO L275 PluginConnector]: CDTParser initialized [2020-10-22 01:09:03,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-22 01:09:03,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa95ddf2/ed2d81aa287e419da245ca57a3fe3db6/FLAGe1f0503d9 [2020-10-22 01:09:04,245 INFO L306 CDTParser]: Found 1 translation units. [2020-10-22 01:09:04,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-22 01:09:04,246 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-22 01:09:04,247 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-22 01:09:04,247 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-22 01:09:04,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa95ddf2/ed2d81aa287e419da245ca57a3fe3db6/FLAGe1f0503d9 [2020-10-22 01:09:04,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa95ddf2/ed2d81aa287e419da245ca57a3fe3db6 [2020-10-22 01:09:04,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-22 01:09:04,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-22 01:09:04,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-22 01:09:04,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-22 01:09:04,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-22 01:09:04,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:09:04" (1/1) ... [2020-10-22 01:09:04,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2572e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:04, skipping insertion in model container [2020-10-22 01:09:04,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:09:04" (1/1) ... [2020-10-22 01:09:04,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-22 01:09:04,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-22 01:09:04,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:09:05,010 INFO L203 MainTranslator]: Completed pre-run [2020-10-22 01:09:05,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:09:05,038 INFO L208 MainTranslator]: Completed translation [2020-10-22 01:09:05,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05 WrapperNode [2020-10-22 01:09:05,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-22 01:09:05,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-22 01:09:05,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-22 01:09:05,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-22 01:09:05,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-22 01:09:05,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-22 01:09:05,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-22 01:09:05,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-22 01:09:05,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... [2020-10-22 01:09:05,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-22 01:09:05,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-22 01:09:05,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-22 01:09:05,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-22 01:09:05,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:09:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-22 01:09:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-22 01:09:05,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-22 01:09:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-22 01:09:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-22 01:09:05,156 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-22 01:09:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-22 01:09:05,157 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-22 01:09:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-22 01:09:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-22 01:09:05,159 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-22 01:09:05,404 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-22 01:09:05,404 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-22 01:09:05,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:09:05 BoogieIcfgContainer [2020-10-22 01:09:05,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-22 01:09:05,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-22 01:09:05,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-22 01:09:05,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-22 01:09:05,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 01:09:04" (1/3) ... [2020-10-22 01:09:05,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0f8bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:09:05, skipping insertion in model container [2020-10-22 01:09:05,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:09:05" (2/3) ... [2020-10-22 01:09:05,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0f8bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:09:05, skipping insertion in model container [2020-10-22 01:09:05,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:09:05" (3/3) ... [2020-10-22 01:09:05,417 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-22 01:09:05,431 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-22 01:09:05,432 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-22 01:09:05,444 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-22 01:09:05,446 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-22 01:09:05,483 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,483 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,484 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,484 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,484 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,485 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,485 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,485 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,486 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,486 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,487 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,487 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,488 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,488 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,488 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,489 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,489 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,490 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,490 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,490 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,491 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,491 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,495 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,496 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,496 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,496 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,497 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,505 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,505 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,506 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,506 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,506 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:09:05,515 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-22 01:09:05,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-22 01:09:05,555 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-22 01:09:05,555 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-22 01:09:05,555 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-22 01:09:05,556 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-22 01:09:05,556 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-22 01:09:05,556 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-22 01:09:05,556 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-22 01:09:05,556 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-22 01:09:05,577 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-22 01:09:05,578 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-22 01:09:05,581 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-22 01:09:05,583 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-22 01:09:05,631 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-22 01:09:05,632 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-22 01:09:05,637 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. [2020-10-22 01:09:05,640 INFO L116 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-22 01:09:06,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-22 01:09:06,413 INFO L131 LiptonReduction]: Checked pairs total: 866 [2020-10-22 01:09:06,413 INFO L133 LiptonReduction]: Total number of compositions: 34 [2020-10-22 01:09:06,421 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-22 01:09:06,435 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-22 01:09:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-22 01:09:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-22 01:09:06,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:06,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:06,448 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-22 01:09:06,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772739241] [2020-10-22 01:09:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:06,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772739241] [2020-10-22 01:09:06,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:09:06,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:09:06,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1490024349] [2020-10-22 01:09:06,642 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:06,647 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:06,669 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 63 transitions. [2020-10-22 01:09:06,670 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:06,745 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [203#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2020-10-22 01:09:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:09:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:09:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:09:06,766 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2020-10-22 01:09:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:06,799 INFO L93 Difference]: Finished difference Result 109 states and 241 transitions. [2020-10-22 01:09:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-22 01:09:06,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-22 01:09:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:06,814 INFO L225 Difference]: With dead ends: 109 [2020-10-22 01:09:06,815 INFO L226 Difference]: Without dead ends: 108 [2020-10-22 01:09:06,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:09:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-22 01:09:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-22 01:09:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-22 01:09:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 240 transitions. [2020-10-22 01:09:06,869 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 240 transitions. Word has length 15 [2020-10-22 01:09:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:06,870 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 240 transitions. [2020-10-22 01:09:06,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:09:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 240 transitions. [2020-10-22 01:09:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-22 01:09:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:06,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:06,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-22 01:09:06,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -456809054, now seen corresponding path program 1 times [2020-10-22 01:09:06,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:06,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273233469] [2020-10-22 01:09:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:06,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273233469] [2020-10-22 01:09:06,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:09:06,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:09:06,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1541034398] [2020-10-22 01:09:06,948 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:06,951 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:06,960 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 131 transitions. [2020-10-22 01:09:06,960 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:07,090 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:07,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-22 01:09:07,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:07,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-22 01:09:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-22 01:09:07,093 INFO L87 Difference]: Start difference. First operand 108 states and 240 transitions. Second operand 3 states. [2020-10-22 01:09:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:07,108 INFO L93 Difference]: Finished difference Result 142 states and 322 transitions. [2020-10-22 01:09:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-22 01:09:07,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-22 01:09:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:07,111 INFO L225 Difference]: With dead ends: 142 [2020-10-22 01:09:07,111 INFO L226 Difference]: Without dead ends: 142 [2020-10-22 01:09:07,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-22 01:09:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-22 01:09:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-10-22 01:09:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-22 01:09:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 281 transitions. [2020-10-22 01:09:07,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 281 transitions. Word has length 19 [2020-10-22 01:09:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:07,146 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 281 transitions. [2020-10-22 01:09:07,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-22 01:09:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 281 transitions. [2020-10-22 01:09:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-22 01:09:07,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:07,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:07,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-22 01:09:07,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash 166337548, now seen corresponding path program 1 times [2020-10-22 01:09:07,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:07,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154659624] [2020-10-22 01:09:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:07,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154659624] [2020-10-22 01:09:07,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803276998] [2020-10-22 01:09:07,255 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 [2020-10-22 01:09:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-22 01:09:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:07,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:07,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-22 01:09:07,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55611791] [2020-10-22 01:09:07,358 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:07,361 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:07,371 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 96 transitions. [2020-10-22 01:09:07,371 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:07,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:07,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:09:07,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:09:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:09:07,531 INFO L87 Difference]: Start difference. First operand 125 states and 281 transitions. Second operand 4 states. [2020-10-22 01:09:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:07,552 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2020-10-22 01:09:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-22 01:09:07,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-22 01:09:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:07,555 INFO L225 Difference]: With dead ends: 176 [2020-10-22 01:09:07,555 INFO L226 Difference]: Without dead ends: 176 [2020-10-22 01:09:07,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:09:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-22 01:09:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2020-10-22 01:09:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-22 01:09:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-22 01:09:07,582 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 21 [2020-10-22 01:09:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:07,582 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-22 01:09:07,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:09:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-22 01:09:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-22 01:09:07,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:07,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:07,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-22 01:09:07,802 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-22 01:09:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:07,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697124135] [2020-10-22 01:09:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:07,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697124135] [2020-10-22 01:09:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568572969] [2020-10-22 01:09:07,942 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 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 [2020-10-22 01:09:07,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:09:07,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-22 01:09:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:08,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:08,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:09:08,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575545338] [2020-10-22 01:09:08,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:08,022 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:08,031 INFO L252 McrAutomatonBuilder]: Finished intersection with 63 states and 112 transitions. [2020-10-22 01:09:08,032 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:08,233 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:08,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-22 01:09:08,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-22 01:09:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-22 01:09:08,235 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 5 states. [2020-10-22 01:09:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:08,259 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-22 01:09:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-22 01:09:08,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-22 01:09:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:08,262 INFO L225 Difference]: With dead ends: 210 [2020-10-22 01:09:08,262 INFO L226 Difference]: Without dead ends: 210 [2020-10-22 01:09:08,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-22 01:09:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-22 01:09:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-22 01:09:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-22 01:09:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-22 01:09:08,276 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-22 01:09:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:08,277 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-22 01:09:08,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-22 01:09:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-22 01:09:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-22 01:09:08,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:08,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:08,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:08,493 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-22 01:09:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:08,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62041899] [2020-10-22 01:09:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62041899] [2020-10-22 01:09:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057731920] [2020-10-22 01:09:08,593 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 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 [2020-10-22 01:09:08,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-22 01:09:08,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-22 01:09:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:08,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:08,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-22 01:09:08,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075556801] [2020-10-22 01:09:08,671 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:08,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:08,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 71 states and 128 transitions. [2020-10-22 01:09:08,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:08,939 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:08,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-22 01:09:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-22 01:09:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:09:08,941 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 6 states. [2020-10-22 01:09:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:08,971 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-22 01:09:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-22 01:09:08,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-22 01:09:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:08,974 INFO L225 Difference]: With dead ends: 244 [2020-10-22 01:09:08,974 INFO L226 Difference]: Without dead ends: 244 [2020-10-22 01:09:08,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:09:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-22 01:09:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-22 01:09:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-22 01:09:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-22 01:09:08,987 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-22 01:09:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:08,987 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-22 01:09:08,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-22 01:09:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-22 01:09:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-22 01:09:08,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:08,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:09,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:09,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-22 01:09:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:09,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303643771] [2020-10-22 01:09:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:09,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303643771] [2020-10-22 01:09:09,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705819633] [2020-10-22 01:09:09,277 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 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 [2020-10-22 01:09:09,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:09:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:09,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-22 01:09:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-22 01:09:09,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:09,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-22 01:09:09,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351076822] [2020-10-22 01:09:09,370 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:09,373 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:09,386 INFO L252 McrAutomatonBuilder]: Finished intersection with 79 states and 144 transitions. [2020-10-22 01:09:09,386 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:09,683 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:09,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:09:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:09:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-22 01:09:09,684 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 7 states. [2020-10-22 01:09:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:09,713 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-22 01:09:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-22 01:09:09,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-22 01:09:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:09,716 INFO L225 Difference]: With dead ends: 261 [2020-10-22 01:09:09,716 INFO L226 Difference]: Without dead ends: 261 [2020-10-22 01:09:09,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-22 01:09:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-22 01:09:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-22 01:09:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-22 01:09:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-22 01:09:09,726 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-22 01:09:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:09,726 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-22 01:09:09,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:09:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-22 01:09:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-22 01:09:09,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:09,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:09,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:09,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-22 01:09:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:09,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459262268] [2020-10-22 01:09:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-22 01:09:09,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459262268] [2020-10-22 01:09:09,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439762604] [2020-10-22 01:09:09,991 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 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 [2020-10-22 01:09:10,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-22 01:09:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-22 01:09:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-22 01:09:10,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:10,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:09:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1125141818] [2020-10-22 01:09:10,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:10,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:10,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 87 states and 160 transitions. [2020-10-22 01:09:10,075 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:10,350 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3888#(< firstIncrementThread1of1ForFork0_~i~0 4), 3889#(or (< firstIncrementThread1of1ForFork0_~i~0 4) (<= 5 firstIncrementThread1of1ForFork0_~i~0)), 3890#(or (<= 4 firstIncrementThread1of1ForFork0_~i~0) (< firstIncrementThread1of1ForFork0_~i~0 3)), 3887#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2020-10-22 01:09:10,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:09:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:09:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:09:10,352 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 9 states. [2020-10-22 01:09:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:10,420 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-22 01:09:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-22 01:09:10,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-22 01:09:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:10,429 INFO L225 Difference]: With dead ends: 447 [2020-10-22 01:09:10,429 INFO L226 Difference]: Without dead ends: 447 [2020-10-22 01:09:10,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:09:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-22 01:09:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-22 01:09:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-22 01:09:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-22 01:09:10,443 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 29 [2020-10-22 01:09:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:10,443 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-22 01:09:10,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:09:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-22 01:09:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:10,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:10,447 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:10,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-22 01:09:10,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 6 times [2020-10-22 01:09:10,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:10,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916423564] [2020-10-22 01:09:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:10,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916423564] [2020-10-22 01:09:10,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402605253] [2020-10-22 01:09:10,978 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 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 [2020-10-22 01:09:11,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-22 01:09:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:11,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-22 01:09:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:11,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-22 01:09:11,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-22 01:09:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867005335] [2020-10-22 01:09:11,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:11,106 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:11,126 INFO L252 McrAutomatonBuilder]: Finished intersection with 111 states and 208 transitions. [2020-10-22 01:09:11,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:11,643 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:11,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:09:11,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:11,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:09:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:09:11,646 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-22 01:09:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:12,402 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-22 01:09:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-22 01:09:12,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-22 01:09:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:12,408 INFO L225 Difference]: With dead ends: 1728 [2020-10-22 01:09:12,409 INFO L226 Difference]: Without dead ends: 876 [2020-10-22 01:09:12,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-22 01:09:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-22 01:09:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-22 01:09:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-22 01:09:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-22 01:09:12,427 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-22 01:09:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:12,428 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-22 01:09:12,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:09:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-22 01:09:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:12,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:12,430 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:12,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:12,645 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 7 times [2020-10-22 01:09:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498993754] [2020-10-22 01:09:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:12,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498993754] [2020-10-22 01:09:12,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899614873] [2020-10-22 01:09:12,865 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 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 [2020-10-22 01:09:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:12,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1309237418] [2020-10-22 01:09:12,958 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:12,963 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:12,982 INFO L252 McrAutomatonBuilder]: Finished intersection with 130 states and 239 transitions. [2020-10-22 01:09:12,982 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:13,639 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:13,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:13,640 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 21 states. [2020-10-22 01:09:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:14,314 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-22 01:09:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-22 01:09:14,315 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:14,322 INFO L225 Difference]: With dead ends: 1731 [2020-10-22 01:09:14,323 INFO L226 Difference]: Without dead ends: 816 [2020-10-22 01:09:14,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-22 01:09:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-22 01:09:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-22 01:09:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-22 01:09:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-22 01:09:14,338 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-22 01:09:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:14,339 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-22 01:09:14,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-22 01:09:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:14,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:14,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:14,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:14,551 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 8 times [2020-10-22 01:09:14,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:14,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835609183] [2020-10-22 01:09:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:14,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835609183] [2020-10-22 01:09:14,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312799132] [2020-10-22 01:09:14,824 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 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 [2020-10-22 01:09:14,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:09:14,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:14,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:14,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:14,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:14,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1269928707] [2020-10-22 01:09:14,929 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:14,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:14,955 INFO L252 McrAutomatonBuilder]: Finished intersection with 118 states and 206 transitions. [2020-10-22 01:09:14,955 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:15,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:15,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:15,454 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 21 states. [2020-10-22 01:09:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:16,182 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-22 01:09:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:16,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:16,187 INFO L225 Difference]: With dead ends: 2131 [2020-10-22 01:09:16,187 INFO L226 Difference]: Without dead ends: 792 [2020-10-22 01:09:16,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-22 01:09:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-22 01:09:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-22 01:09:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-22 01:09:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-22 01:09:16,205 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-22 01:09:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:16,205 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-22 01:09:16,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-22 01:09:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:16,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:16,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:16,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-22 01:09:16,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 9 times [2020-10-22 01:09:16,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:16,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235169302] [2020-10-22 01:09:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:16,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235169302] [2020-10-22 01:09:16,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800728341] [2020-10-22 01:09:16,696 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 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 [2020-10-22 01:09:16,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-22 01:09:16,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:16,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:16,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1543338063] [2020-10-22 01:09:16,808 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:16,813 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:16,839 INFO L252 McrAutomatonBuilder]: Finished intersection with 124 states and 218 transitions. [2020-10-22 01:09:16,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:17,404 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:17,406 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 21 states. [2020-10-22 01:09:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:18,060 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-22 01:09:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:18,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:18,066 INFO L225 Difference]: With dead ends: 2670 [2020-10-22 01:09:18,067 INFO L226 Difference]: Without dead ends: 768 [2020-10-22 01:09:18,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-22 01:09:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-22 01:09:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-22 01:09:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-22 01:09:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-22 01:09:18,084 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-22 01:09:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:18,084 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-22 01:09:18,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-22 01:09:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:18,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:18,087 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:18,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:18,302 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 10 times [2020-10-22 01:09:18,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:18,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227980927] [2020-10-22 01:09:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:18,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227980927] [2020-10-22 01:09:18,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305718605] [2020-10-22 01:09:18,546 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 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 [2020-10-22 01:09:18,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:09:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:18,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:18,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423959522] [2020-10-22 01:09:18,617 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:18,621 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:18,640 INFO L252 McrAutomatonBuilder]: Finished intersection with 130 states and 230 transitions. [2020-10-22 01:09:18,640 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:19,287 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:19,289 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 21 states. [2020-10-22 01:09:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:20,043 INFO L93 Difference]: Finished difference Result 3002 states and 6985 transitions. [2020-10-22 01:09:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-22 01:09:20,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:20,055 INFO L225 Difference]: With dead ends: 3002 [2020-10-22 01:09:20,055 INFO L226 Difference]: Without dead ends: 2239 [2020-10-22 01:09:20,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2020-10-22 01:09:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2020-10-22 01:09:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1161. [2020-10-22 01:09:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2020-10-22 01:09:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2801 transitions. [2020-10-22 01:09:20,103 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2801 transitions. Word has length 35 [2020-10-22 01:09:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:20,103 INFO L481 AbstractCegarLoop]: Abstraction has 1161 states and 2801 transitions. [2020-10-22 01:09:20,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2801 transitions. [2020-10-22 01:09:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:20,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:20,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:20,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:20,322 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash -664535820, now seen corresponding path program 11 times [2020-10-22 01:09:20,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:20,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181506349] [2020-10-22 01:09:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:20,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181506349] [2020-10-22 01:09:20,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321783720] [2020-10-22 01:09:20,542 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 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 [2020-10-22 01:09:20,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-22 01:09:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:20,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:20,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:20,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [585605867] [2020-10-22 01:09:20,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:20,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:20,650 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 160 transitions. [2020-10-22 01:09:20,651 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:20,981 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:20,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:20,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:20,983 INFO L87 Difference]: Start difference. First operand 1161 states and 2801 transitions. Second operand 21 states. [2020-10-22 01:09:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:21,767 INFO L93 Difference]: Finished difference Result 2571 states and 5988 transitions. [2020-10-22 01:09:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-22 01:09:21,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:21,778 INFO L225 Difference]: With dead ends: 2571 [2020-10-22 01:09:21,778 INFO L226 Difference]: Without dead ends: 1870 [2020-10-22 01:09:21,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=662, Invalid=1888, Unknown=0, NotChecked=0, Total=2550 [2020-10-22 01:09:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2020-10-22 01:09:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1077. [2020-10-22 01:09:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-10-22 01:09:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2573 transitions. [2020-10-22 01:09:21,829 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2573 transitions. Word has length 35 [2020-10-22 01:09:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:21,829 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2573 transitions. [2020-10-22 01:09:21,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2573 transitions. [2020-10-22 01:09:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:21,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:21,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:22,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-22 01:09:22,048 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:22,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1221893120, now seen corresponding path program 12 times [2020-10-22 01:09:22,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:22,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251188792] [2020-10-22 01:09:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:22,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251188792] [2020-10-22 01:09:22,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458444324] [2020-10-22 01:09:22,318 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 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 [2020-10-22 01:09:22,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-22 01:09:22,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:22,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057748442] [2020-10-22 01:09:22,458 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:22,466 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:22,489 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 162 transitions. [2020-10-22 01:09:22,490 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:22,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:22,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:22,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:22,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:22,875 INFO L87 Difference]: Start difference. First operand 1077 states and 2573 transitions. Second operand 21 states. [2020-10-22 01:09:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:23,650 INFO L93 Difference]: Finished difference Result 2648 states and 6147 transitions. [2020-10-22 01:09:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:09:23,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:23,658 INFO L225 Difference]: With dead ends: 2648 [2020-10-22 01:09:23,659 INFO L226 Difference]: Without dead ends: 1604 [2020-10-22 01:09:23,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2020-10-22 01:09:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-10-22 01:09:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 943. [2020-10-22 01:09:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-10-22 01:09:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2226 transitions. [2020-10-22 01:09:23,687 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2226 transitions. Word has length 35 [2020-10-22 01:09:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:23,687 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 2226 transitions. [2020-10-22 01:09:23,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2226 transitions. [2020-10-22 01:09:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:23,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:23,690 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:23,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-22 01:09:23,904 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash 28653580, now seen corresponding path program 13 times [2020-10-22 01:09:23,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:23,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92640615] [2020-10-22 01:09:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:24,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92640615] [2020-10-22 01:09:24,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830739288] [2020-10-22 01:09:24,108 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 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 [2020-10-22 01:09:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:24,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:24,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:24,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:24,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:24,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2093206368] [2020-10-22 01:09:24,192 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:24,197 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:24,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 164 transitions. [2020-10-22 01:09:24,214 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:24,555 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:24,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:24,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:24,559 INFO L87 Difference]: Start difference. First operand 943 states and 2226 transitions. Second operand 21 states. [2020-10-22 01:09:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:25,223 INFO L93 Difference]: Finished difference Result 2739 states and 6338 transitions. [2020-10-22 01:09:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-22 01:09:25,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:25,231 INFO L225 Difference]: With dead ends: 2739 [2020-10-22 01:09:25,231 INFO L226 Difference]: Without dead ends: 1253 [2020-10-22 01:09:25,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-10-22 01:09:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-10-22 01:09:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 759. [2020-10-22 01:09:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2020-10-22 01:09:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1760 transitions. [2020-10-22 01:09:25,253 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1760 transitions. Word has length 35 [2020-10-22 01:09:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:25,253 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 1760 transitions. [2020-10-22 01:09:25,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1760 transitions. [2020-10-22 01:09:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:25,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:25,255 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:25,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-22 01:09:25,471 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -786810600, now seen corresponding path program 14 times [2020-10-22 01:09:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699770596] [2020-10-22 01:09:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:25,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699770596] [2020-10-22 01:09:25,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918599048] [2020-10-22 01:09:25,699 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 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 [2020-10-22 01:09:25,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:09:25,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:25,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:25,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:25,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:25,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:25,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147047128] [2020-10-22 01:09:25,793 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:25,798 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:25,819 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 166 transitions. [2020-10-22 01:09:25,819 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:26,175 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:26,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:26,176 INFO L87 Difference]: Start difference. First operand 759 states and 1760 transitions. Second operand 21 states. [2020-10-22 01:09:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:26,843 INFO L93 Difference]: Finished difference Result 2504 states and 5790 transitions. [2020-10-22 01:09:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:09:26,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:26,849 INFO L225 Difference]: With dead ends: 2504 [2020-10-22 01:09:26,849 INFO L226 Difference]: Without dead ends: 552 [2020-10-22 01:09:26,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1639, Unknown=0, NotChecked=0, Total=2256 [2020-10-22 01:09:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-22 01:09:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 521. [2020-10-22 01:09:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-22 01:09:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-22 01:09:26,860 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-22 01:09:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:26,860 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-22 01:09:26,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-22 01:09:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:26,862 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:27,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:27,078 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 15 times [2020-10-22 01:09:27,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:27,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652317781] [2020-10-22 01:09:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652317781] [2020-10-22 01:09:27,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230436405] [2020-10-22 01:09:27,344 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 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 [2020-10-22 01:09:27,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-22 01:09:27,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:27,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:27,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:27,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858340704] [2020-10-22 01:09:27,426 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:27,431 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:27,458 INFO L252 McrAutomatonBuilder]: Finished intersection with 140 states and 251 transitions. [2020-10-22 01:09:27,458 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:28,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41999#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-22 01:09:28,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:09:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:28,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:09:28,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:28,194 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 22 states. [2020-10-22 01:09:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:28,796 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-22 01:09:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-22 01:09:28,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-22 01:09:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:28,800 INFO L225 Difference]: With dead ends: 1734 [2020-10-22 01:09:28,801 INFO L226 Difference]: Without dead ends: 894 [2020-10-22 01:09:28,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-22 01:09:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-22 01:09:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-22 01:09:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-22 01:09:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-22 01:09:28,814 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-22 01:09:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:28,814 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-22 01:09:28,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:09:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-22 01:09:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:28,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:28,816 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:29,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-22 01:09:29,031 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 16 times [2020-10-22 01:09:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425480172] [2020-10-22 01:09:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:29,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425480172] [2020-10-22 01:09:29,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001851554] [2020-10-22 01:09:29,306 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 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 [2020-10-22 01:09:29,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:09:29,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:29,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:29,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:29,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [23187074] [2020-10-22 01:09:29,378 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:29,383 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:29,401 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 159 transitions. [2020-10-22 01:09:29,401 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:29,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45064#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-22 01:09:29,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:09:29,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:09:29,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:29,757 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 22 states. [2020-10-22 01:09:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:30,415 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-22 01:09:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:30,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-22 01:09:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:30,421 INFO L225 Difference]: With dead ends: 1717 [2020-10-22 01:09:30,421 INFO L226 Difference]: Without dead ends: 774 [2020-10-22 01:09:30,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-22 01:09:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-22 01:09:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-22 01:09:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-22 01:09:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-22 01:09:30,432 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-22 01:09:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:30,432 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-22 01:09:30,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:09:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-22 01:09:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:30,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:30,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:30,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-22 01:09:30,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 17 times [2020-10-22 01:09:30,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:30,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12048095] [2020-10-22 01:09:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:30,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12048095] [2020-10-22 01:09:30,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129350985] [2020-10-22 01:09:30,867 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 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 [2020-10-22 01:09:30,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-22 01:09:30,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:30,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:30,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1410345126] [2020-10-22 01:09:30,949 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:30,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:30,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 161 transitions. [2020-10-22 01:09:30,973 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:31,255 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48024#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-22 01:09:31,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:09:31,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:09:31,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:31,257 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 22 states. [2020-10-22 01:09:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:31,893 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-22 01:09:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:31,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-22 01:09:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:31,898 INFO L225 Difference]: With dead ends: 2063 [2020-10-22 01:09:31,898 INFO L226 Difference]: Without dead ends: 716 [2020-10-22 01:09:31,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-22 01:09:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-22 01:09:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-22 01:09:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-22 01:09:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-22 01:09:31,909 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-22 01:09:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:31,909 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-22 01:09:31,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:09:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-22 01:09:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:31,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:31,910 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:32,113 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 18 times [2020-10-22 01:09:32,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:32,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76182026] [2020-10-22 01:09:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:32,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76182026] [2020-10-22 01:09:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430218442] [2020-10-22 01:09:32,332 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 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 [2020-10-22 01:09:32,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-22 01:09:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:32,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:32,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:32,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [338845874] [2020-10-22 01:09:32,407 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:32,412 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:32,431 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 163 transitions. [2020-10-22 01:09:32,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:32,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51244#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2020-10-22 01:09:32,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:09:32,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:09:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:32,804 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 22 states. [2020-10-22 01:09:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:33,473 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-22 01:09:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:33,474 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-10-22 01:09:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:33,480 INFO L225 Difference]: With dead ends: 2541 [2020-10-22 01:09:33,481 INFO L226 Difference]: Without dead ends: 658 [2020-10-22 01:09:33,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-22 01:09:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-22 01:09:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-22 01:09:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-22 01:09:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-22 01:09:33,501 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-22 01:09:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:33,502 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-22 01:09:33,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:09:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-22 01:09:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:33,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:33,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:33,719 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 19 times [2020-10-22 01:09:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651684670] [2020-10-22 01:09:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:33,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651684670] [2020-10-22 01:09:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447583402] [2020-10-22 01:09:33,961 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 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 [2020-10-22 01:09:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:09:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:34,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:34,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-22 01:09:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [469057548] [2020-10-22 01:09:34,090 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:34,098 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:34,121 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 165 transitions. [2020-10-22 01:09:34,121 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:34,487 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:34,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:09:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:09:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:09:34,488 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 21 states. [2020-10-22 01:09:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:35,256 INFO L93 Difference]: Finished difference Result 2615 states and 6067 transitions. [2020-10-22 01:09:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-22 01:09:35,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-22 01:09:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:35,267 INFO L225 Difference]: With dead ends: 2615 [2020-10-22 01:09:35,267 INFO L226 Difference]: Without dead ends: 1699 [2020-10-22 01:09:35,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=692, Invalid=1960, Unknown=0, NotChecked=0, Total=2652 [2020-10-22 01:09:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-10-22 01:09:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 827. [2020-10-22 01:09:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-10-22 01:09:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1968 transitions. [2020-10-22 01:09:35,294 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1968 transitions. Word has length 35 [2020-10-22 01:09:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:35,294 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1968 transitions. [2020-10-22 01:09:35,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:09:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1968 transitions. [2020-10-22 01:09:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:35,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:35,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:35,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:35,511 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 20 times [2020-10-22 01:09:35,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:35,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749491762] [2020-10-22 01:09:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:35,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749491762] [2020-10-22 01:09:35,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34557703] [2020-10-22 01:09:35,708 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 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 [2020-10-22 01:09:35,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:09:35,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:09:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:35,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:35,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-22 01:09:35,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1204047095] [2020-10-22 01:09:35,776 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:35,779 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:35,795 INFO L252 McrAutomatonBuilder]: Finished intersection with 114 states and 198 transitions. [2020-10-22 01:09:35,796 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:36,288 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:36,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:09:36,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:09:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:09:36,290 INFO L87 Difference]: Start difference. First operand 827 states and 1968 transitions. Second operand 19 states. [2020-10-22 01:09:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:37,001 INFO L93 Difference]: Finished difference Result 2261 states and 5231 transitions. [2020-10-22 01:09:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-22 01:09:37,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-22 01:09:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:37,020 INFO L225 Difference]: With dead ends: 2261 [2020-10-22 01:09:37,020 INFO L226 Difference]: Without dead ends: 1294 [2020-10-22 01:09:37,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-10-22 01:09:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2020-10-22 01:09:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 693. [2020-10-22 01:09:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-22 01:09:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1621 transitions. [2020-10-22 01:09:37,061 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1621 transitions. Word has length 35 [2020-10-22 01:09:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:37,061 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 1621 transitions. [2020-10-22 01:09:37,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:09:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1621 transitions. [2020-10-22 01:09:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:37,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:37,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:37,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-22 01:09:37,279 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash 244641734, now seen corresponding path program 21 times [2020-10-22 01:09:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:37,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941660157] [2020-10-22 01:09:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:37,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941660157] [2020-10-22 01:09:37,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920106850] [2020-10-22 01:09:37,468 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 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 [2020-10-22 01:09:37,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-22 01:09:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:09:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:37,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:37,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-22 01:09:37,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464926466] [2020-10-22 01:09:37,559 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:37,564 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:37,582 INFO L252 McrAutomatonBuilder]: Finished intersection with 110 states and 185 transitions. [2020-10-22 01:09:37,582 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:38,018 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:38,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:09:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:09:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:09:38,020 INFO L87 Difference]: Start difference. First operand 693 states and 1621 transitions. Second operand 19 states. [2020-10-22 01:09:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:38,641 INFO L93 Difference]: Finished difference Result 2379 states and 5483 transitions. [2020-10-22 01:09:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-22 01:09:38,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-22 01:09:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:38,654 INFO L225 Difference]: With dead ends: 2379 [2020-10-22 01:09:38,654 INFO L226 Difference]: Without dead ends: 943 [2020-10-22 01:09:38,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2020-10-22 01:09:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2020-10-22 01:09:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 509. [2020-10-22 01:09:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-22 01:09:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1155 transitions. [2020-10-22 01:09:38,679 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1155 transitions. Word has length 35 [2020-10-22 01:09:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:38,679 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 1155 transitions. [2020-10-22 01:09:38,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:09:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1155 transitions. [2020-10-22 01:09:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:09:38,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:09:38,682 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:09:38,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-22 01:09:38,898 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-22 01:09:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:09:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1751254010, now seen corresponding path program 22 times [2020-10-22 01:09:38,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:09:38,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384698358] [2020-10-22 01:09:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:09:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:09:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:39,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384698358] [2020-10-22 01:09:39,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20954857] [2020-10-22 01:09:39,101 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 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 [2020-10-22 01:09:39,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:09:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:09:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:09:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:09:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:09:39,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:09:39,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-22 01:09:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [539703602] [2020-10-22 01:09:39,170 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:09:39,175 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:09:39,197 INFO L252 McrAutomatonBuilder]: Finished intersection with 120 states and 207 transitions. [2020-10-22 01:09:39,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:09:39,736 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:09:39,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:09:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:09:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:09:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:09:39,737 INFO L87 Difference]: Start difference. First operand 509 states and 1155 transitions. Second operand 19 states. [2020-10-22 01:09:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:09:40,329 INFO L93 Difference]: Finished difference Result 1969 states and 4520 transitions. [2020-10-22 01:09:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:09:40,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-22 01:09:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:09:40,329 INFO L225 Difference]: With dead ends: 1969 [2020-10-22 01:09:40,330 INFO L226 Difference]: Without dead ends: 0 [2020-10-22 01:09:40,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:09:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-22 01:09:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-22 01:09:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-22 01:09:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-22 01:09:40,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-22 01:09:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:09:40,332 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-22 01:09:40,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:09:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-22 01:09:40,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-22 01:09:40,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:09:40,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 01:09:40 BasicIcfg [2020-10-22 01:09:40,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-22 01:09:40,540 INFO L168 Benchmark]: Toolchain (without parser) took 35873.84 ms. Allocated memory was 137.4 MB in the beginning and 540.5 MB in the end (delta: 403.2 MB). Free memory was 98.2 MB in the beginning and 150.5 MB in the end (delta: -52.3 MB). Peak memory consumption was 350.9 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,540 INFO L168 Benchmark]: CDTParser took 3.22 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 97.4 MB in the beginning and 177.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,541 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 175.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,541 INFO L168 Benchmark]: Boogie Preprocessor took 22.98 ms. Allocated memory is still 200.8 MB. Free memory was 175.7 MB in the beginning and 174.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,547 INFO L168 Benchmark]: RCFGBuilder took 312.61 ms. Allocated memory is still 200.8 MB. Free memory was 174.3 MB in the beginning and 157.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,548 INFO L168 Benchmark]: TraceAbstraction took 35130.47 ms. Allocated memory was 200.8 MB in the beginning and 540.5 MB in the end (delta: 339.7 MB). Free memory was 156.7 MB in the beginning and 150.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 345.9 MB. Max. memory is 7.1 GB. [2020-10-22 01:09:40,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.22 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 367.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 97.4 MB in the beginning and 177.0 MB in the end (delta: -79.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 200.8 MB. Free memory was 177.0 MB in the beginning and 175.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.98 ms. Allocated memory is still 200.8 MB. Free memory was 175.7 MB in the beginning and 174.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.61 ms. Allocated memory is still 200.8 MB. Free memory was 174.3 MB in the beginning and 157.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35130.47 ms. Allocated memory was 200.8 MB in the beginning and 540.5 MB in the end (delta: 339.7 MB). Free memory was 156.7 MB in the beginning and 150.5 MB in the end (delta: 6.2 MB). Peak memory consumption was 345.9 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: 34.9s, OverallIterations: 24, TraceHistogramMax: 5, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 1980 SDtfs, 8488 SDslu, 10048 SDs, 0 SdLazy, 6048 SolverSat, 1044 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2929 GetRequests, 2133 SyntacticMatches, 0 SemanticMatches, 796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6555 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1161occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 7018 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1474 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1428 ConstructedInterpolants, 0 QuantifiedInterpolants, 132388 SizeOfPredicates, 307 NumberOfNonLiveVariables, 2333 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 46 InterpolantComputations, 3 PerfectInterpolantSequences, 1458/1854 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...