/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 00:41:44,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 00:41:44,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 00:41:44,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 00:41:44,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 00:41:44,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 00:41:44,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 00:41:44,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 00:41:44,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 00:41:44,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 00:41:44,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 00:41:44,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 00:41:44,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 00:41:44,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 00:41:44,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 00:41:44,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 00:41:44,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 00:41:44,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 00:41:44,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 00:41:44,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 00:41:44,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 00:41:44,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 00:41:44,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 00:41:44,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 00:41:44,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 00:41:44,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 00:41:44,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 00:41:44,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 00:41:44,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 00:41:44,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 00:41:44,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 00:41:44,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 00:41:44,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 00:41:44,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 00:41:44,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 00:41:44,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 00:41:44,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2019-12-27 00:41:44,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 00:41:44,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 00:41:44,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 00:41:44,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 00:41:44,483 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 00:41:44,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 00:41:44,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 00:41:44,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 00:41:44,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 00:41:44,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 00:41:44,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 00:41:44,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 00:41:44,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 00:41:44,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 00:41:44,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 00:41:44,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 00:41:44,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 00:41:44,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 00:41:44,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 00:41:44,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 00:41:44,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 00:41:44,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 00:41:44,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 00:41:44,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 00:41:44,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 00:41:44,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 00:41:44,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 00:41:44,806 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 00:41:44,806 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 00:41:44,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 00:41:44,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc05a5df7/7216b282b0c64b6b822f59b132f454c8/FLAGd71d95c76 [2019-12-27 00:41:45,467 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 00:41:45,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 00:41:45,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc05a5df7/7216b282b0c64b6b822f59b132f454c8/FLAGd71d95c76 [2019-12-27 00:41:45,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc05a5df7/7216b282b0c64b6b822f59b132f454c8 [2019-12-27 00:41:45,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 00:41:45,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 00:41:45,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 00:41:45,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 00:41:45,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 00:41:45,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 12:41:45" (1/1) ... [2019-12-27 00:41:45,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397eda04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:45, skipping insertion in model container [2019-12-27 00:41:45,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 12:41:45" (1/1) ... [2019-12-27 00:41:45,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 00:41:45,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 00:41:46,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 00:41:46,345 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 00:41:46,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 00:41:46,500 INFO L208 MainTranslator]: Completed translation [2019-12-27 00:41:46,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46 WrapperNode [2019-12-27 00:41:46,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 00:41:46,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 00:41:46,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 00:41:46,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 00:41:46,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 00:41:46,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 00:41:46,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 00:41:46,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 00:41:46,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (1/1) ... [2019-12-27 00:41:46,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 00:41:46,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 00:41:46,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 00:41:46,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 00:41:46,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (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 [2019-12-27 00:41:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 00:41:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 00:41:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 00:41:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 00:41:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 00:41:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 00:41:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 00:41:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 00:41:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 00:41:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 00:41:46,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 00:41:46,653 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 00:41:47,007 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 00:41:47,008 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 00:41:47,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 12:41:47 BoogieIcfgContainer [2019-12-27 00:41:47,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 00:41:47,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 00:41:47,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 00:41:47,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 00:41:47,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 12:41:45" (1/3) ... [2019-12-27 00:41:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db09c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 12:41:47, skipping insertion in model container [2019-12-27 00:41:47,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 12:41:46" (2/3) ... [2019-12-27 00:41:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db09c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 12:41:47, skipping insertion in model container [2019-12-27 00:41:47,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 12:41:47" (3/3) ... [2019-12-27 00:41:47,018 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-27 00:41:47,029 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 00:41:47,029 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 00:41:47,035 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 00:41:47,036 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 00:41:47,063 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,063 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,064 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,064 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,064 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,064 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,065 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,065 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,065 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,065 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,066 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,066 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,066 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,066 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,067 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,067 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,067 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,068 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,068 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,068 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,068 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,069 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,069 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,069 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,070 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,070 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,070 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,070 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,070 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,071 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,075 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,075 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,075 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,076 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,076 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,076 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,081 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,082 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,082 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,082 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,083 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,083 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 00:41:47,096 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 00:41:47,115 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 00:41:47,115 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 00:41:47,115 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 00:41:47,116 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 00:41:47,116 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 00:41:47,116 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 00:41:47,116 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 00:41:47,116 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 00:41:47,130 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 00:41:47,132 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 00:41:47,172 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 00:41:47,172 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 00:41:47,179 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 00:41:47,182 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 00:41:47,200 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 00:41:47,200 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 00:41:47,202 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 00:41:47,204 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 00:41:47,205 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 00:41:48,452 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 00:41:48,576 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 00:41:48,576 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 00:41:48,580 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 00:41:48,590 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 00:41:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 00:41:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 00:41:48,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:48,600 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 00:41:48,600 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 00:41:48,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:48,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525855209] [2019-12-27 00:41:48,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:48,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525855209] [2019-12-27 00:41:48,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:48,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 00:41:48,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368117798] [2019-12-27 00:41:48,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 00:41:48,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:48,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 00:41:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 00:41:48,851 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 00:41:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:48,897 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 00:41:48,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 00:41:48,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 00:41:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:48,929 INFO L225 Difference]: With dead ends: 54 [2019-12-27 00:41:48,929 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 00:41:48,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 00:41:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 00:41:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 00:41:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 00:41:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 00:41:48,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 00:41:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:48,989 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 00:41:48,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 00:41:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 00:41:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 00:41:48,994 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:48,995 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:48,995 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 00:41:48,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:48,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030320918] [2019-12-27 00:41:49,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030320918] [2019-12-27 00:41:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:49,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 00:41:49,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127841107] [2019-12-27 00:41:49,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 00:41:49,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 00:41:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 00:41:49,121 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 00:41:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:49,149 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 00:41:49,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 00:41:49,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 00:41:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:49,151 INFO L225 Difference]: With dead ends: 42 [2019-12-27 00:41:49,151 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 00:41:49,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 00:41:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 00:41:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 00:41:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 00:41:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 00:41:49,159 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 00:41:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:49,160 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 00:41:49,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 00:41:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 00:41:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 00:41:49,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:49,161 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:49,161 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 00:41:49,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:49,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602915855] [2019-12-27 00:41:49,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602915855] [2019-12-27 00:41:49,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:49,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 00:41:49,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270610832] [2019-12-27 00:41:49,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 00:41:49,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 00:41:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 00:41:49,257 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 00:41:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:49,272 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 00:41:49,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 00:41:49,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 00:41:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:49,274 INFO L225 Difference]: With dead ends: 51 [2019-12-27 00:41:49,274 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 00:41:49,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 00:41:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 00:41:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 00:41:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 00:41:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 00:41:49,283 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 00:41:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:49,283 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 00:41:49,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 00:41:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 00:41:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 00:41:49,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:49,284 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:49,285 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 00:41:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:49,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585228458] [2019-12-27 00:41:49,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585228458] [2019-12-27 00:41:49,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944390454] [2019-12-27 00:41:49,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:49,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:49,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:49,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 00:41:49,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:49,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 00:41:49,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77529622] [2019-12-27 00:41:49,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 00:41:49,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:49,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 00:41:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 00:41:49,500 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 00:41:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:49,530 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 00:41:49,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 00:41:49,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 00:41:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:49,531 INFO L225 Difference]: With dead ends: 56 [2019-12-27 00:41:49,531 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 00:41:49,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 00:41:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 00:41:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 00:41:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 00:41:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 00:41:49,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 00:41:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:49,540 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 00:41:49,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 00:41:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 00:41:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 00:41:49,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:49,541 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:49,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:49,743 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:49,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 00:41:49,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:49,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332026325] [2019-12-27 00:41:49,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332026325] [2019-12-27 00:41:49,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228585855] [2019-12-27 00:41:49,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:49,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:49,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:49,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 00:41:49,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:49,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:49,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 00:41:49,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198643448] [2019-12-27 00:41:49,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 00:41:49,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 00:41:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-27 00:41:49,914 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-27 00:41:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:49,993 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 00:41:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 00:41:49,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 00:41:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:49,995 INFO L225 Difference]: With dead ends: 63 [2019-12-27 00:41:49,995 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 00:41:49,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 00:41:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 00:41:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 00:41:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 00:41:50,005 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 00:41:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:50,005 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 00:41:50,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 00:41:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 00:41:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 00:41:50,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:50,006 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:50,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:50,210 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 00:41:50,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:50,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586164776] [2019-12-27 00:41:50,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:50,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586164776] [2019-12-27 00:41:50,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788173890] [2019-12-27 00:41:50,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:50,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:41:50,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:50,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:50,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:50,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:50,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:50,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460543774] [2019-12-27 00:41:50,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:50,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:50,433 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 00:41:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:50,463 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 00:41:50,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 00:41:50,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 00:41:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:50,468 INFO L225 Difference]: With dead ends: 66 [2019-12-27 00:41:50,468 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 00:41:50,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 00:41:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 00:41:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 00:41:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 00:41:50,478 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 00:41:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:50,478 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 00:41:50,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 00:41:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 00:41:50,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:50,479 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:50,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:50,684 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 00:41:50,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:50,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879385520] [2019-12-27 00:41:50,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:50,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879385520] [2019-12-27 00:41:50,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:50,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 00:41:50,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528779792] [2019-12-27 00:41:50,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 00:41:50,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 00:41:50,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 00:41:50,766 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 00:41:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:50,785 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 00:41:50,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 00:41:50,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 00:41:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:50,789 INFO L225 Difference]: With dead ends: 68 [2019-12-27 00:41:50,790 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 00:41:50,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 00:41:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 00:41:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 00:41:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 00:41:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 00:41:50,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 00:41:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:50,797 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 00:41:50,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 00:41:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 00:41:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 00:41:50,798 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:50,798 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:50,798 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 00:41:50,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:50,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835397287] [2019-12-27 00:41:50,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:50,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835397287] [2019-12-27 00:41:50,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 00:41:50,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 00:41:50,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860773918] [2019-12-27 00:41:50,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 00:41:50,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 00:41:50,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 00:41:50,857 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 00:41:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:50,889 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-27 00:41:50,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 00:41:50,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 00:41:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:50,891 INFO L225 Difference]: With dead ends: 69 [2019-12-27 00:41:50,891 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 00:41:50,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-27 00:41:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 00:41:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-27 00:41:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 00:41:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 00:41:50,899 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 00:41:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:50,899 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 00:41:50,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 00:41:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 00:41:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 00:41:50,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:50,900 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:50,900 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 00:41:50,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:50,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007874428] [2019-12-27 00:41:50,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:50,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007874428] [2019-12-27 00:41:50,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521447873] [2019-12-27 00:41:50,957 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:51,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:41:51,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:51,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:51,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:51,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:51,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:51,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019009333] [2019-12-27 00:41:51,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:51,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:51,085 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-27 00:41:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:51,162 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 00:41:51,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 00:41:51,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 00:41:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:51,164 INFO L225 Difference]: With dead ends: 77 [2019-12-27 00:41:51,164 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 00:41:51,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:41:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 00:41:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 00:41:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 00:41:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 00:41:51,171 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 00:41:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:51,171 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 00:41:51,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 00:41:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:51,172 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:51,172 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:51,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:51,385 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 00:41:51,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:51,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260073116] [2019-12-27 00:41:51,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:51,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260073116] [2019-12-27 00:41:51,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841592739] [2019-12-27 00:41:51,469 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:51,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:41:51,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:51,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:51,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:51,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:51,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:51,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904240168] [2019-12-27 00:41:51,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:51,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:51,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:51,603 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 00:41:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:51,632 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 00:41:51,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:41:51,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 00:41:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:51,633 INFO L225 Difference]: With dead ends: 80 [2019-12-27 00:41:51,634 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 00:41:51,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 00:41:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 00:41:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 00:41:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 00:41:51,640 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 00:41:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:51,640 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 00:41:51,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 00:41:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:51,641 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:51,642 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:51,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:51,845 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 00:41:51,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:51,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694648068] [2019-12-27 00:41:51,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:51,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694648068] [2019-12-27 00:41:51,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75546787] [2019-12-27 00:41:51,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:51,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:41:51,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:51,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:51,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:52,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:52,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:52,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737789630] [2019-12-27 00:41:52,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:52,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:52,039 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 00:41:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:52,143 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-27 00:41:52,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 00:41:52,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:52,145 INFO L225 Difference]: With dead ends: 81 [2019-12-27 00:41:52,145 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 00:41:52,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:41:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 00:41:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-27 00:41:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 00:41:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 00:41:52,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 00:41:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:52,151 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 00:41:52,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 00:41:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:52,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:52,152 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:52,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:52,361 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 00:41:52,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:52,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843760931] [2019-12-27 00:41:52,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:52,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843760931] [2019-12-27 00:41:52,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522737737] [2019-12-27 00:41:52,439 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:52,486 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:41:52,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:52,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:52,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:52,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:52,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:52,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119290036] [2019-12-27 00:41:52,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:52,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:52,535 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 00:41:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:52,619 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 00:41:52,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 00:41:52,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:52,621 INFO L225 Difference]: With dead ends: 85 [2019-12-27 00:41:52,621 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 00:41:52,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-27 00:41:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 00:41:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-27 00:41:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 00:41:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 00:41:52,626 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 00:41:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:52,627 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 00:41:52,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 00:41:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:52,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:52,628 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:52,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:52,831 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 00:41:52,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:52,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332529293] [2019-12-27 00:41:52,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:52,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332529293] [2019-12-27 00:41:52,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350664669] [2019-12-27 00:41:52,903 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:52,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:52,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:52,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:52,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:53,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:53,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:53,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811290545] [2019-12-27 00:41:53,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:53,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:53,019 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 00:41:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:53,126 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-27 00:41:53,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:41:53,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:53,127 INFO L225 Difference]: With dead ends: 86 [2019-12-27 00:41:53,127 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 00:41:53,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:41:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 00:41:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-27 00:41:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 00:41:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 00:41:53,136 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 00:41:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:53,136 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 00:41:53,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 00:41:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:53,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:53,137 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:53,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:53,338 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-27 00:41:53,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:53,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843927324] [2019-12-27 00:41:53,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:53,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843927324] [2019-12-27 00:41:53,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637503476] [2019-12-27 00:41:53,419 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:53,466 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 00:41:53,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:53,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:41:53,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:53,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:53,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:53,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000843459] [2019-12-27 00:41:53,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:53,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:53,535 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-27 00:41:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:53,597 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-27 00:41:53,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:41:53,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:53,598 INFO L225 Difference]: With dead ends: 90 [2019-12-27 00:41:53,598 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 00:41:53,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 00:41:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2019-12-27 00:41:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 00:41:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 00:41:53,602 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 00:41:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:53,602 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 00:41:53,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 00:41:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:53,603 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:53,603 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:53,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:53,804 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-27 00:41:53,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:53,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198268172] [2019-12-27 00:41:53,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:53,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198268172] [2019-12-27 00:41:53,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412634369] [2019-12-27 00:41:53,874 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:53,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:53,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:53,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:53,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:53,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875586185] [2019-12-27 00:41:53,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:53,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:53,990 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 00:41:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:54,126 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 00:41:54,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:41:54,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:54,131 INFO L225 Difference]: With dead ends: 88 [2019-12-27 00:41:54,131 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 00:41:54,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-27 00:41:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 00:41:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-27 00:41:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 00:41:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 00:41:54,135 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 00:41:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:54,136 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 00:41:54,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 00:41:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:54,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:54,137 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:54,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:54,347 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-27 00:41:54,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:54,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249344645] [2019-12-27 00:41:54,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:54,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249344645] [2019-12-27 00:41:54,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646646813] [2019-12-27 00:41:54,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:54,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:54,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:54,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:41:54,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:54,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:54,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 00:41:54,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196905648] [2019-12-27 00:41:54,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 00:41:54,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 00:41:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-27 00:41:54,515 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-27 00:41:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:54,794 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-27 00:41:54,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:41:54,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 00:41:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:54,796 INFO L225 Difference]: With dead ends: 90 [2019-12-27 00:41:54,796 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 00:41:54,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:41:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 00:41:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2019-12-27 00:41:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 00:41:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 00:41:54,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 00:41:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:54,805 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 00:41:54,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 00:41:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 00:41:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 00:41:54,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:54,806 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:55,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:55,019 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 00:41:55,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:55,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652396031] [2019-12-27 00:41:55,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:55,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652396031] [2019-12-27 00:41:55,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770085850] [2019-12-27 00:41:55,148 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:55,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:41:55,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:55,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:55,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:55,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:55,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:55,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834145617] [2019-12-27 00:41:55,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:55,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:55,321 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-27 00:41:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:55,467 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 00:41:55,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:41:55,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 00:41:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:55,470 INFO L225 Difference]: With dead ends: 92 [2019-12-27 00:41:55,470 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 00:41:55,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:41:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 00:41:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 00:41:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 00:41:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 00:41:55,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 00:41:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:55,479 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 00:41:55,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 00:41:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:55,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:55,481 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:55,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:55,694 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 00:41:55,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:55,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356550374] [2019-12-27 00:41:55,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:55,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356550374] [2019-12-27 00:41:55,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555989381] [2019-12-27 00:41:55,805 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:55,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:41:55,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:55,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:41:55,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:55,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:55,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:41:55,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639460073] [2019-12-27 00:41:56,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:41:56,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:41:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:41:56,027 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 00:41:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:56,058 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 00:41:56,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:41:56,058 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 00:41:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:56,059 INFO L225 Difference]: With dead ends: 95 [2019-12-27 00:41:56,060 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 00:41:56,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:41:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 00:41:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 00:41:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 00:41:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 00:41:56,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 00:41:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:56,064 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 00:41:56,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:41:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 00:41:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:56,065 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:56,065 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:56,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:56,269 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-27 00:41:56,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:56,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406881056] [2019-12-27 00:41:56,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:56,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406881056] [2019-12-27 00:41:56,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333905856] [2019-12-27 00:41:56,344 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:56,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:41:56,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:56,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:56,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:56,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:56,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:56,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115321820] [2019-12-27 00:41:56,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:56,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:56,484 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 00:41:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:56,612 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-27 00:41:56,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:41:56,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:56,614 INFO L225 Difference]: With dead ends: 98 [2019-12-27 00:41:56,614 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 00:41:56,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:41:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 00:41:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-27 00:41:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 00:41:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 00:41:56,621 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 00:41:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:56,622 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 00:41:56,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 00:41:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:56,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:56,623 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:56,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:56,835 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-27 00:41:56,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:56,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140751677] [2019-12-27 00:41:56,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:56,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140751677] [2019-12-27 00:41:56,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335920324] [2019-12-27 00:41:56,939 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:57,012 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:41:57,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:57,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:57,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:57,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:57,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:57,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553474190] [2019-12-27 00:41:57,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:57,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:57,119 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 00:41:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:57,223 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 00:41:57,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:41:57,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:57,225 INFO L225 Difference]: With dead ends: 101 [2019-12-27 00:41:57,225 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 00:41:57,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:41:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 00:41:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 00:41:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 00:41:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 00:41:57,230 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 00:41:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:57,230 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 00:41:57,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 00:41:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:57,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:57,231 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:57,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:57,432 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:57,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-27 00:41:57,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:57,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268949423] [2019-12-27 00:41:57,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:57,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268949423] [2019-12-27 00:41:57,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724591375] [2019-12-27 00:41:57,488 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:57,530 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:57,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:57,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:57,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:57,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:57,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:57,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576919645] [2019-12-27 00:41:57,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:57,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:57,660 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 00:41:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:57,825 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-27 00:41:57,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:41:57,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:57,827 INFO L225 Difference]: With dead ends: 105 [2019-12-27 00:41:57,827 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 00:41:57,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:41:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 00:41:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-27 00:41:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 00:41:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 00:41:57,832 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 00:41:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:57,834 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 00:41:57,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 00:41:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:57,835 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:57,835 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:58,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:58,036 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-27 00:41:58,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:58,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453648034] [2019-12-27 00:41:58,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:58,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453648034] [2019-12-27 00:41:58,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705405563] [2019-12-27 00:41:58,099 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:58,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 00:41:58,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:58,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:58,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:58,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:58,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:58,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058552931] [2019-12-27 00:41:58,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:58,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:58,225 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 00:41:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:58,310 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-27 00:41:58,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 00:41:58,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:58,311 INFO L225 Difference]: With dead ends: 103 [2019-12-27 00:41:58,311 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 00:41:58,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:41:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 00:41:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-27 00:41:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 00:41:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 00:41:58,317 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 00:41:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:58,318 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 00:41:58,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 00:41:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:58,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:58,319 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:58,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:58,522 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-27 00:41:58,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:58,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277804612] [2019-12-27 00:41:58,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:58,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277804612] [2019-12-27 00:41:58,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087428961] [2019-12-27 00:41:58,585 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:58,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:58,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:58,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:58,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:58,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737653253] [2019-12-27 00:41:58,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:58,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:58,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:58,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:58,707 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 00:41:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:58,858 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-27 00:41:58,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:41:58,859 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:58,860 INFO L225 Difference]: With dead ends: 110 [2019-12-27 00:41:58,860 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 00:41:58,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:41:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 00:41:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-27 00:41:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 00:41:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 00:41:58,864 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 00:41:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:58,864 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 00:41:58,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 00:41:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:58,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:58,865 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:59,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:59,068 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-27 00:41:59,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:59,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437386230] [2019-12-27 00:41:59,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:59,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437386230] [2019-12-27 00:41:59,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762752411] [2019-12-27 00:41:59,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:59,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:41:59,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:59,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:59,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:59,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:59,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:59,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233588052] [2019-12-27 00:41:59,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:59,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:59,250 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 00:41:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:59,398 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-27 00:41:59,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:41:59,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:59,399 INFO L225 Difference]: With dead ends: 112 [2019-12-27 00:41:59,399 INFO L226 Difference]: Without dead ends: 111 [2019-12-27 00:41:59,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:41:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-27 00:41:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-27 00:41:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 00:41:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 00:41:59,403 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 00:41:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:59,403 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 00:41:59,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 00:41:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:59,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:59,406 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:41:59,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:41:59,607 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:41:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:41:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-27 00:41:59,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:41:59,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005622046] [2019-12-27 00:41:59,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:41:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:41:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:59,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005622046] [2019-12-27 00:41:59,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546111300] [2019-12-27 00:41:59,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:41:59,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:41:59,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:41:59,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:41:59,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:41:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:41:59,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:41:59,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:41:59,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605411524] [2019-12-27 00:41:59,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:41:59,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:41:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:41:59,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:41:59,778 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 00:41:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:41:59,908 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-27 00:41:59,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:41:59,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:41:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:41:59,910 INFO L225 Difference]: With dead ends: 106 [2019-12-27 00:41:59,910 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 00:41:59,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:41:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 00:41:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-27 00:41:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 00:41:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 00:41:59,914 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 00:41:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:41:59,914 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 00:41:59,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:41:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 00:41:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:41:59,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:41:59,915 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:00,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:00,116 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-27 00:42:00,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:00,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482699551] [2019-12-27 00:42:00,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:00,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482699551] [2019-12-27 00:42:00,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784039576] [2019-12-27 00:42:00,186 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:42:00,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:00,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:00,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:00,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:00,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:00,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:00,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626548984] [2019-12-27 00:42:00,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:00,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:00,312 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 00:42:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:00,480 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-27 00:42:00,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:42:00,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:00,482 INFO L225 Difference]: With dead ends: 112 [2019-12-27 00:42:00,482 INFO L226 Difference]: Without dead ends: 111 [2019-12-27 00:42:00,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-27 00:42:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-27 00:42:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 00:42:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 00:42:00,486 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 00:42:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:00,487 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 00:42:00,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 00:42:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:00,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:00,488 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:00,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:00,691 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-27 00:42:00,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:00,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704357975] [2019-12-27 00:42:00,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:00,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704357975] [2019-12-27 00:42:00,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139040075] [2019-12-27 00:42:00,755 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 00:42:00,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:00,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:00,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:00,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:00,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:00,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:00,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523536554] [2019-12-27 00:42:00,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:00,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:00,891 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 00:42:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:01,097 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-27 00:42:01,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:01,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:01,098 INFO L225 Difference]: With dead ends: 115 [2019-12-27 00:42:01,098 INFO L226 Difference]: Without dead ends: 114 [2019-12-27 00:42:01,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-27 00:42:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-27 00:42:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 00:42:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 00:42:01,102 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 00:42:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:01,102 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 00:42:01,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 00:42:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:01,103 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:01,103 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:01,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,307 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-27 00:42:01,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:01,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138648624] [2019-12-27 00:42:01,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:01,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138648624] [2019-12-27 00:42:01,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124639100] [2019-12-27 00:42:01,358 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 00:42:01,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:01,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:01,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:01,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:01,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:01,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157766252] [2019-12-27 00:42:01,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:01,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:01,473 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 00:42:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:01,638 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-27 00:42:01,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:42:01,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:01,639 INFO L225 Difference]: With dead ends: 111 [2019-12-27 00:42:01,639 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 00:42:01,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 00:42:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-27 00:42:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 00:42:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 00:42:01,644 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 00:42:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:01,644 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 00:42:01,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 00:42:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:01,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:01,645 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:01,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,848 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-27 00:42:01,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:01,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337462338] [2019-12-27 00:42:01,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:01,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337462338] [2019-12-27 00:42:01,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887131938] [2019-12-27 00:42:01,903 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:01,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:01,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:02,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:02,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:02,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124086513] [2019-12-27 00:42:02,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:02,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:02,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:02,041 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-27 00:42:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:02,236 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-27 00:42:02,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:02,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:02,238 INFO L225 Difference]: With dead ends: 109 [2019-12-27 00:42:02,238 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 00:42:02,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 00:42:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-27 00:42:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 00:42:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-27 00:42:02,244 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-27 00:42:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:02,245 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-27 00:42:02,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-27 00:42:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:02,245 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:02,246 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:02,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:02,449 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-27 00:42:02,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:02,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161750825] [2019-12-27 00:42:02,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:02,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161750825] [2019-12-27 00:42:02,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886973770] [2019-12-27 00:42:02,542 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:02,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:02,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:02,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:02,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:02,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:02,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:02,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692892698] [2019-12-27 00:42:02,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:02,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:02,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:02,731 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-27 00:42:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:02,926 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2019-12-27 00:42:02,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:02,926 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:02,928 INFO L225 Difference]: With dead ends: 110 [2019-12-27 00:42:02,928 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 00:42:02,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 00:42:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2019-12-27 00:42:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 00:42:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-27 00:42:02,932 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-27 00:42:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:02,933 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-27 00:42:02,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-27 00:42:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:02,934 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:02,934 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:03,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,138 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-27 00:42:03,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:03,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019256588] [2019-12-27 00:42:03,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:03,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019256588] [2019-12-27 00:42:03,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948699601] [2019-12-27 00:42:03,218 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:42:03,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:03,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 00:42:03,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:03,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:03,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 00:42:03,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690129759] [2019-12-27 00:42:03,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 00:42:03,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 00:42:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 00:42:03,379 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-27 00:42:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:03,653 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-27 00:42:03,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:03,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 00:42:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:03,655 INFO L225 Difference]: With dead ends: 115 [2019-12-27 00:42:03,655 INFO L226 Difference]: Without dead ends: 114 [2019-12-27 00:42:03,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-12-27 00:42:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-27 00:42:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-27 00:42:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 00:42:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 00:42:03,661 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 00:42:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:03,661 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 00:42:03,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 00:42:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 00:42:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 00:42:03,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:03,663 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:03,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,868 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 00:42:03,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:03,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830973532] [2019-12-27 00:42:03,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:03,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830973532] [2019-12-27 00:42:03,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344506736] [2019-12-27 00:42:03,938 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:03,984 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:03,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:03,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:03,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:04,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:04,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:04,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735183993] [2019-12-27 00:42:04,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:04,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:04,065 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-27 00:42:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:04,179 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 00:42:04,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:04,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 00:42:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:04,182 INFO L225 Difference]: With dead ends: 107 [2019-12-27 00:42:04,182 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 00:42:04,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 00:42:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 00:42:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 00:42:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 00:42:04,198 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 00:42:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:04,198 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 00:42:04,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 00:42:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:04,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:04,199 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:04,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:04,404 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 00:42:04,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:04,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950701196] [2019-12-27 00:42:04,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:04,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950701196] [2019-12-27 00:42:04,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734995696] [2019-12-27 00:42:04,486 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:04,532 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:42:04,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:04,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:04,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:04,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:04,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:04,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471001037] [2019-12-27 00:42:04,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:04,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:04,705 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-27 00:42:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:04,750 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-27 00:42:04,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:04,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 00:42:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:04,752 INFO L225 Difference]: With dead ends: 110 [2019-12-27 00:42:04,752 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 00:42:04,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 00:42:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-27 00:42:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:04,759 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:04,760 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:04,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:04,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:04,761 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:04,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:04,965 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-27 00:42:04,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:04,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61071359] [2019-12-27 00:42:04,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:05,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61071359] [2019-12-27 00:42:05,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995688401] [2019-12-27 00:42:05,056 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:05,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:05,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:05,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:05,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:05,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:05,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:05,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275020197] [2019-12-27 00:42:05,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:05,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:05,259 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:05,426 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-27 00:42:05,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:05,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:05,427 INFO L225 Difference]: With dead ends: 116 [2019-12-27 00:42:05,428 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 00:42:05,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 00:42:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-27 00:42:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:05,433 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:05,433 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:05,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:05,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:05,434 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:05,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:05,637 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-27 00:42:05,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:05,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583705062] [2019-12-27 00:42:05,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:05,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583705062] [2019-12-27 00:42:05,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721920645] [2019-12-27 00:42:05,714 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:05,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:05,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:05,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:05,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:05,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:05,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:05,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023042943] [2019-12-27 00:42:05,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:05,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:05,849 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:05,984 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-27 00:42:05,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:05,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:05,985 INFO L225 Difference]: With dead ends: 121 [2019-12-27 00:42:05,985 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 00:42:05,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 00:42:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-27 00:42:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:05,988 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:05,989 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:05,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:05,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:05,991 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:06,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:06,194 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-27 00:42:06,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:06,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762979893] [2019-12-27 00:42:06,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:06,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762979893] [2019-12-27 00:42:06,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064388354] [2019-12-27 00:42:06,263 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:06,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:06,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:06,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:06,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:07,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:07,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:07,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757797231] [2019-12-27 00:42:07,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:07,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-12-27 00:42:07,116 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:07,314 INFO L93 Difference]: Finished difference Result 126 states and 265 transitions. [2019-12-27 00:42:07,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:42:07,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:07,316 INFO L225 Difference]: With dead ends: 126 [2019-12-27 00:42:07,316 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 00:42:07,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=235, Unknown=1, NotChecked=0, Total=380 [2019-12-27 00:42:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 00:42:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2019-12-27 00:42:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:07,321 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:07,321 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:07,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:07,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:07,322 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:07,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:07,525 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:07,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-27 00:42:07,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:07,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068080164] [2019-12-27 00:42:07,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:07,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068080164] [2019-12-27 00:42:07,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621472561] [2019-12-27 00:42:07,597 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:07,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:07,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:07,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:07,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:07,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385632218] [2019-12-27 00:42:07,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:07,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:07,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:07,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:07,752 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:07,884 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-27 00:42:07,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:07,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:07,885 INFO L225 Difference]: With dead ends: 122 [2019-12-27 00:42:07,886 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 00:42:07,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 00:42:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 00:42:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:07,890 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:07,890 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:07,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:07,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:07,891 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:08,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:08,094 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:08,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:08,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-27 00:42:08,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:08,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191646625] [2019-12-27 00:42:08,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:08,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191646625] [2019-12-27 00:42:08,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775333595] [2019-12-27 00:42:08,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:08,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:08,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:08,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:08,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:08,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:08,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:08,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422177493] [2019-12-27 00:42:08,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:08,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:08,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:08,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:08,295 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:08,500 INFO L93 Difference]: Finished difference Result 131 states and 279 transitions. [2019-12-27 00:42:08,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:42:08,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:08,501 INFO L225 Difference]: With dead ends: 131 [2019-12-27 00:42:08,502 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 00:42:08,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-27 00:42:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 00:42:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-27 00:42:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 00:42:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 00:42:08,506 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 00:42:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:08,506 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 00:42:08,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 00:42:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:08,507 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:08,507 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:08,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:08,710 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-27 00:42:08,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:08,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697857938] [2019-12-27 00:42:08,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:08,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697857938] [2019-12-27 00:42:08,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304768745] [2019-12-27 00:42:08,785 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:08,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:42:08,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:08,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:08,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:08,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:08,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:08,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629389269] [2019-12-27 00:42:08,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:08,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:08,996 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-27 00:42:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:09,241 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2019-12-27 00:42:09,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:09,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:09,242 INFO L225 Difference]: With dead ends: 133 [2019-12-27 00:42:09,242 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 00:42:09,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-27 00:42:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 00:42:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2019-12-27 00:42:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 00:42:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 00:42:09,246 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 00:42:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:09,247 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 00:42:09,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 00:42:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:09,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:09,247 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:09,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:09,448 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-27 00:42:09,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:09,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554059174] [2019-12-27 00:42:09,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:09,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554059174] [2019-12-27 00:42:09,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47893879] [2019-12-27 00:42:09,526 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:09,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:09,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:09,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:09,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:09,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:09,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:09,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094100330] [2019-12-27 00:42:09,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:09,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:09,790 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-27 00:42:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:10,146 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-27 00:42:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:42:10,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:10,148 INFO L225 Difference]: With dead ends: 128 [2019-12-27 00:42:10,148 INFO L226 Difference]: Without dead ends: 127 [2019-12-27 00:42:10,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-27 00:42:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-27 00:42:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2019-12-27 00:42:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 00:42:10,152 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 00:42:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:10,152 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 00:42:10,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 00:42:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:10,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:10,153 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:10,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:10,357 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-27 00:42:10,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:10,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263826009] [2019-12-27 00:42:10,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:10,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263826009] [2019-12-27 00:42:10,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645006573] [2019-12-27 00:42:10,421 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:10,465 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:10,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:10,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:10,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:10,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:10,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:10,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483830479] [2019-12-27 00:42:10,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:10,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:10,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:10,543 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 00:42:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:10,662 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-27 00:42:10,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 00:42:10,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:10,664 INFO L225 Difference]: With dead ends: 121 [2019-12-27 00:42:10,664 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 00:42:10,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-27 00:42:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 00:42:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-27 00:42:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 00:42:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 00:42:10,668 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 00:42:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:10,668 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 00:42:10,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 00:42:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:10,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:10,669 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:10,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:10,873 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-27 00:42:10,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:10,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552683778] [2019-12-27 00:42:10,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:10,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552683778] [2019-12-27 00:42:10,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619505178] [2019-12-27 00:42:10,938 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:10,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:10,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:10,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:10,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:11,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:11,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:11,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880363229] [2019-12-27 00:42:11,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:11,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:11,076 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-27 00:42:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:11,274 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-27 00:42:11,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:11,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:11,275 INFO L225 Difference]: With dead ends: 136 [2019-12-27 00:42:11,276 INFO L226 Difference]: Without dead ends: 135 [2019-12-27 00:42:11,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-27 00:42:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-27 00:42:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-27 00:42:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:11,279 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:11,280 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:11,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:11,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:11,281 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:11,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:11,484 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-27 00:42:11,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:11,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289493419] [2019-12-27 00:42:11,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289493419] [2019-12-27 00:42:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897938339] [2019-12-27 00:42:11,556 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:11,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:11,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:11,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:11,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:11,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016641047] [2019-12-27 00:42:11,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:11,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:11,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:11,685 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:12,386 WARN L192 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-27 00:42:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:12,605 INFO L93 Difference]: Finished difference Result 147 states and 307 transitions. [2019-12-27 00:42:12,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:12,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:12,607 INFO L225 Difference]: With dead ends: 147 [2019-12-27 00:42:12,607 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 00:42:12,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 00:42:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 99. [2019-12-27 00:42:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:12,614 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:12,616 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:12,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:12,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:12,617 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:12,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:12,821 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-27 00:42:12,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:12,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651453263] [2019-12-27 00:42:12,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:12,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651453263] [2019-12-27 00:42:12,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976300897] [2019-12-27 00:42:12,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:12,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:12,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:12,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:12,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:13,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:13,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:13,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662359621] [2019-12-27 00:42:13,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:13,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:13,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:13,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:13,061 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:13,333 INFO L93 Difference]: Finished difference Result 145 states and 306 transitions. [2019-12-27 00:42:13,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:13,333 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:13,334 INFO L225 Difference]: With dead ends: 145 [2019-12-27 00:42:13,335 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 00:42:13,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:42:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 00:42:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-27 00:42:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 00:42:13,338 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 00:42:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:13,339 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 00:42:13,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 00:42:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:13,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:13,339 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:13,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:13,540 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-27 00:42:13,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:13,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242774854] [2019-12-27 00:42:13,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:13,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242774854] [2019-12-27 00:42:13,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327295043] [2019-12-27 00:42:13,602 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:13,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:42:13,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:13,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:13,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:13,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:13,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:13,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851161269] [2019-12-27 00:42:13,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:13,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:13,736 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 00:42:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:13,956 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-27 00:42:13,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:13,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:13,957 INFO L225 Difference]: With dead ends: 136 [2019-12-27 00:42:13,957 INFO L226 Difference]: Without dead ends: 135 [2019-12-27 00:42:13,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-27 00:42:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-27 00:42:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:13,960 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:13,960 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:13,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:13,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:13,960 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:14,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:14,161 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-27 00:42:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:14,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447428306] [2019-12-27 00:42:14,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:14,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447428306] [2019-12-27 00:42:14,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093304181] [2019-12-27 00:42:14,259 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:14,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:14,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:14,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:14,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:14,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:14,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:14,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397232133] [2019-12-27 00:42:14,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:14,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:14,439 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:14,711 INFO L93 Difference]: Finished difference Result 132 states and 283 transitions. [2019-12-27 00:42:14,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:14,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:14,713 INFO L225 Difference]: With dead ends: 132 [2019-12-27 00:42:14,713 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 00:42:14,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 00:42:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2019-12-27 00:42:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:14,721 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:14,722 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:14,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:14,723 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:14,723 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:14,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:14,928 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-27 00:42:14,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:14,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119420393] [2019-12-27 00:42:14,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:15,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119420393] [2019-12-27 00:42:15,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497780665] [2019-12-27 00:42:15,019 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:15,082 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:15,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:15,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:15,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:15,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:15,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:15,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333721906] [2019-12-27 00:42:15,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:15,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:15,243 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:15,531 INFO L93 Difference]: Finished difference Result 131 states and 282 transitions. [2019-12-27 00:42:15,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:15,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:15,533 INFO L225 Difference]: With dead ends: 131 [2019-12-27 00:42:15,533 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 00:42:15,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 00:42:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2019-12-27 00:42:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 00:42:15,539 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 00:42:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:15,539 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 00:42:15,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 00:42:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:15,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:15,540 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:15,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:15,746 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-27 00:42:15,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:15,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591763864] [2019-12-27 00:42:15,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:15,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591763864] [2019-12-27 00:42:15,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644002337] [2019-12-27 00:42:15,814 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:15,859 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:15,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:15,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:42:15,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:15,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:15,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:15,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214411877] [2019-12-27 00:42:15,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:15,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:15,932 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 00:42:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:16,043 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-27 00:42:16,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:16,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:16,044 INFO L225 Difference]: With dead ends: 129 [2019-12-27 00:42:16,045 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 00:42:16,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:42:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 00:42:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2019-12-27 00:42:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 00:42:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 00:42:16,047 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 00:42:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:16,048 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 00:42:16,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 00:42:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:16,048 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:16,048 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:16,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:16,252 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-27 00:42:16,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:16,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200241858] [2019-12-27 00:42:16,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:16,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200241858] [2019-12-27 00:42:16,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415955942] [2019-12-27 00:42:16,317 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:16,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:16,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:18,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:18,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:18,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668602911] [2019-12-27 00:42:18,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:18,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=127, Unknown=1, NotChecked=0, Total=182 [2019-12-27 00:42:18,460 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-27 00:42:18,868 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 00:42:19,705 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-27 00:42:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:19,748 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2019-12-27 00:42:19,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:19,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:19,750 INFO L225 Difference]: With dead ends: 144 [2019-12-27 00:42:19,750 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 00:42:19,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=154, Invalid=306, Unknown=2, NotChecked=0, Total=462 [2019-12-27 00:42:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 00:42:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-27 00:42:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 00:42:19,755 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 00:42:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:19,755 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 00:42:19,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 00:42:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:19,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:19,756 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:19,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:19,959 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-27 00:42:19,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:19,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884709919] [2019-12-27 00:42:19,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:20,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884709919] [2019-12-27 00:42:20,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424471492] [2019-12-27 00:42:20,019 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:20,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:20,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:20,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:20,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:20,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:20,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:20,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122030731] [2019-12-27 00:42:20,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:20,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:20,155 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 00:42:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:20,426 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2019-12-27 00:42:20,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:20,427 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:20,427 INFO L225 Difference]: With dead ends: 136 [2019-12-27 00:42:20,427 INFO L226 Difference]: Without dead ends: 135 [2019-12-27 00:42:20,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:42:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-27 00:42:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2019-12-27 00:42:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 00:42:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-27 00:42:20,431 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-27 00:42:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:20,431 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-27 00:42:20,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-27 00:42:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:20,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:20,432 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:20,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:20,636 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-27 00:42:20,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:20,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697732571] [2019-12-27 00:42:20,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:20,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697732571] [2019-12-27 00:42:20,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075998627] [2019-12-27 00:42:20,736 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:20,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:42:20,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:20,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:20,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:20,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:20,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:20,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82094182] [2019-12-27 00:42:20,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:20,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:20,869 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 14 states. [2019-12-27 00:42:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:21,203 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-27 00:42:21,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:21,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:21,205 INFO L225 Difference]: With dead ends: 142 [2019-12-27 00:42:21,205 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 00:42:21,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 00:42:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2019-12-27 00:42:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 00:42:21,208 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 00:42:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:21,209 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 00:42:21,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 00:42:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:21,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:21,209 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:21,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:21,410 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-27 00:42:21,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:21,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697837136] [2019-12-27 00:42:21,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:21,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697837136] [2019-12-27 00:42:21,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371894876] [2019-12-27 00:42:21,479 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:21,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:21,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:21,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:21,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:21,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:21,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:21,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129656327] [2019-12-27 00:42:21,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:21,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:21,648 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 00:42:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:21,988 INFO L93 Difference]: Finished difference Result 153 states and 317 transitions. [2019-12-27 00:42:21,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:21,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:21,989 INFO L225 Difference]: With dead ends: 153 [2019-12-27 00:42:21,989 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 00:42:21,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 00:42:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2019-12-27 00:42:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 00:42:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 00:42:21,993 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 00:42:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:21,993 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 00:42:21,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 00:42:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:21,994 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:21,994 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:22,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:22,195 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-27 00:42:22,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:22,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831895268] [2019-12-27 00:42:22,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:22,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831895268] [2019-12-27 00:42:22,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53840097] [2019-12-27 00:42:22,257 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:22,299 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:22,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:22,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:22,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:22,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:22,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:22,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023858820] [2019-12-27 00:42:22,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:22,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:22,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:22,388 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-27 00:42:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:22,706 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2019-12-27 00:42:22,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:22,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:22,708 INFO L225 Difference]: With dead ends: 156 [2019-12-27 00:42:22,708 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 00:42:22,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 00:42:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-12-27 00:42:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 00:42:22,713 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 00:42:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:22,713 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 00:42:22,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 00:42:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:22,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:22,714 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:22,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:22,917 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-27 00:42:22,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:22,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847675137] [2019-12-27 00:42:22,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:22,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847675137] [2019-12-27 00:42:22,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715969119] [2019-12-27 00:42:22,986 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:23,043 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:23,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:23,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:23,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:23,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:23,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:23,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485563899] [2019-12-27 00:42:23,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:23,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:23,197 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 00:42:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:23,479 INFO L93 Difference]: Finished difference Result 129 states and 274 transitions. [2019-12-27 00:42:23,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:23,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:23,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:23,480 INFO L225 Difference]: With dead ends: 129 [2019-12-27 00:42:23,481 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 00:42:23,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 00:42:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-27 00:42:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:23,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:23,484 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:23,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:23,485 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:23,485 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:23,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:23,688 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-27 00:42:23,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:23,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944587135] [2019-12-27 00:42:23,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:23,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944587135] [2019-12-27 00:42:23,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119726268] [2019-12-27 00:42:23,779 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:23,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:23,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:23,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:23,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:23,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915853834] [2019-12-27 00:42:23,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:23,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:23,910 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:24,206 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-27 00:42:24,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:24,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:24,208 INFO L225 Difference]: With dead ends: 142 [2019-12-27 00:42:24,208 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 00:42:24,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 00:42:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2019-12-27 00:42:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:24,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:24,212 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:24,212 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:24,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:24,213 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:24,213 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:24,213 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:24,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:24,417 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-27 00:42:24,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:24,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547863388] [2019-12-27 00:42:24,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:24,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547863388] [2019-12-27 00:42:24,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021396275] [2019-12-27 00:42:24,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:24,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:24,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:24,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:24,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:24,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:24,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:24,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904281244] [2019-12-27 00:42:24,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:24,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:24,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:24,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:24,670 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:24,913 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2019-12-27 00:42:24,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:24,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:24,916 INFO L225 Difference]: With dead ends: 146 [2019-12-27 00:42:24,916 INFO L226 Difference]: Without dead ends: 144 [2019-12-27 00:42:24,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-27 00:42:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 99. [2019-12-27 00:42:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 00:42:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 00:42:24,919 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 00:42:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:24,920 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 00:42:24,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 00:42:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:24,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:24,921 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:25,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:25,124 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-27 00:42:25,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:25,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376202573] [2019-12-27 00:42:25,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:25,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376202573] [2019-12-27 00:42:25,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265049743] [2019-12-27 00:42:25,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:25,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:42:25,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:25,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:25,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:25,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:25,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:25,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575509150] [2019-12-27 00:42:25,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:25,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:25,348 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 00:42:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:25,664 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-27 00:42:25,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:25,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:25,666 INFO L225 Difference]: With dead ends: 140 [2019-12-27 00:42:25,666 INFO L226 Difference]: Without dead ends: 138 [2019-12-27 00:42:25,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-27 00:42:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2019-12-27 00:42:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 00:42:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2019-12-27 00:42:25,670 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 12 [2019-12-27 00:42:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:25,670 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2019-12-27 00:42:25,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2019-12-27 00:42:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:25,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:25,671 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:25,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:25,874 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:25,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-27 00:42:25,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:25,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580406789] [2019-12-27 00:42:25,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:25,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580406789] [2019-12-27 00:42:25,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008469526] [2019-12-27 00:42:25,940 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:25,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:25,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:25,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 00:42:25,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:26,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:26,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 00:42:26,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659217608] [2019-12-27 00:42:26,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 00:42:26,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 00:42:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 00:42:26,331 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand 14 states. [2019-12-27 00:42:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:27,010 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2019-12-27 00:42:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:27,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 00:42:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:27,012 INFO L225 Difference]: With dead ends: 143 [2019-12-27 00:42:27,012 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 00:42:27,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:42:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 00:42:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2019-12-27 00:42:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 00:42:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-27 00:42:27,016 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-27 00:42:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:27,016 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-27 00:42:27,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 00:42:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-27 00:42:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 00:42:27,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:27,017 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:27,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:27,220 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 00:42:27,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:27,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807689212] [2019-12-27 00:42:27,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:27,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807689212] [2019-12-27 00:42:27,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076328847] [2019-12-27 00:42:27,293 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:27,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:42:27,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:27,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:27,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:27,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:27,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:27,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192954775] [2019-12-27 00:42:27,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:27,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:27,417 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 16 states. [2019-12-27 00:42:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:27,566 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-27 00:42:27,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:27,567 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 00:42:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:27,568 INFO L225 Difference]: With dead ends: 122 [2019-12-27 00:42:27,568 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 00:42:27,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 00:42:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-27 00:42:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 00:42:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 00:42:27,572 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 00:42:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:27,573 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 00:42:27,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 00:42:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:27,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:27,573 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:27,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:27,777 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-27 00:42:27,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:27,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880288368] [2019-12-27 00:42:27,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:27,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880288368] [2019-12-27 00:42:27,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793652005] [2019-12-27 00:42:27,863 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:27,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:42:27,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:27,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 00:42:27,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 00:42:27,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436233255] [2019-12-27 00:42:27,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 00:42:27,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 00:42:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:42:27,975 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-27 00:42:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:28,003 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-27 00:42:28,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:28,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 00:42:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:28,004 INFO L225 Difference]: With dead ends: 149 [2019-12-27 00:42:28,004 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 00:42:28,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:42:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 00:42:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-27 00:42:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 00:42:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 00:42:28,009 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-27 00:42:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:28,010 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 00:42:28,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 00:42:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 00:42:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:28,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:28,010 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:28,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:28,213 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-27 00:42:28,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:28,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035694528] [2019-12-27 00:42:28,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:28,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035694528] [2019-12-27 00:42:28,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551219388] [2019-12-27 00:42:28,303 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:28,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:28,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:28,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:28,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:28,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:28,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:28,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28351855] [2019-12-27 00:42:28,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:28,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:28,443 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-27 00:42:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:28,609 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-27 00:42:28,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:28,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:28,611 INFO L225 Difference]: With dead ends: 161 [2019-12-27 00:42:28,611 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 00:42:28,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 00:42:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-27 00:42:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 00:42:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-27 00:42:28,615 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-27 00:42:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:28,615 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-27 00:42:28,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-27 00:42:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:28,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:28,616 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:28,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:28,820 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-27 00:42:28,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:28,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422144742] [2019-12-27 00:42:28,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:28,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422144742] [2019-12-27 00:42:28,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915323137] [2019-12-27 00:42:28,901 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:28,947 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:28,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:28,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:28,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:29,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:29,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:29,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678200935] [2019-12-27 00:42:29,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:29,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:29,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:29,072 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 16 states. [2019-12-27 00:42:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:29,241 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-27 00:42:29,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:29,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:29,243 INFO L225 Difference]: With dead ends: 171 [2019-12-27 00:42:29,243 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 00:42:29,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 00:42:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-27 00:42:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 00:42:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-27 00:42:29,247 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-27 00:42:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:29,247 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-27 00:42:29,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-27 00:42:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:29,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:29,248 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:29,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:29,451 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-27 00:42:29,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:29,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668910983] [2019-12-27 00:42:29,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:29,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668910983] [2019-12-27 00:42:29,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147051229] [2019-12-27 00:42:29,530 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:29,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:29,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:30,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:30,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:30,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884474571] [2019-12-27 00:42:30,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:30,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=153, Unknown=1, NotChecked=0, Total=240 [2019-12-27 00:42:30,083 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-27 00:42:30,398 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 00:42:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:30,412 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-27 00:42:30,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:42:30,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:30,414 INFO L225 Difference]: With dead ends: 173 [2019-12-27 00:42:30,414 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 00:42:30,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=318, Unknown=1, NotChecked=0, Total=506 [2019-12-27 00:42:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 00:42:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2019-12-27 00:42:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 00:42:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-27 00:42:30,419 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-27 00:42:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:30,419 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-27 00:42:30,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-27 00:42:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:30,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:30,420 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:30,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:30,624 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-27 00:42:30,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:30,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081048751] [2019-12-27 00:42:30,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:30,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081048751] [2019-12-27 00:42:30,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384038926] [2019-12-27 00:42:30,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:30,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:30,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:30,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:30,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:30,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:30,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946852385] [2019-12-27 00:42:30,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:30,838 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 16 states. [2019-12-27 00:42:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:31,010 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 00:42:31,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:31,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:31,012 INFO L225 Difference]: With dead ends: 176 [2019-12-27 00:42:31,012 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 00:42:31,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 00:42:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-27 00:42:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 00:42:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 00:42:31,017 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 00:42:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:31,018 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 00:42:31,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 00:42:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:31,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:31,018 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:31,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:31,222 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:31,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-27 00:42:31,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:31,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275702898] [2019-12-27 00:42:31,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:31,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275702898] [2019-12-27 00:42:31,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71044720] [2019-12-27 00:42:31,291 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:31,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:42:31,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:31,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:31,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:31,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:31,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:31,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328211121] [2019-12-27 00:42:31,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:31,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:31,470 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-27 00:42:31,875 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 00:42:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:31,913 INFO L93 Difference]: Finished difference Result 189 states and 432 transitions. [2019-12-27 00:42:31,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:31,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:31,915 INFO L225 Difference]: With dead ends: 189 [2019-12-27 00:42:31,916 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 00:42:31,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 00:42:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-27 00:42:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 00:42:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-27 00:42:31,919 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-27 00:42:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:31,920 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-27 00:42:31,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-27 00:42:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:31,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:31,920 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:32,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:32,121 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-27 00:42:32,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:32,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179718348] [2019-12-27 00:42:32,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:32,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179718348] [2019-12-27 00:42:32,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202859315] [2019-12-27 00:42:32,191 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:32,235 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:32,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:32,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:32,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:32,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:32,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:32,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027111082] [2019-12-27 00:42:32,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:32,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:32,364 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 16 states. [2019-12-27 00:42:32,640 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 00:42:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:32,833 INFO L93 Difference]: Finished difference Result 198 states and 450 transitions. [2019-12-27 00:42:32,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:42:32,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:32,835 INFO L225 Difference]: With dead ends: 198 [2019-12-27 00:42:32,835 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 00:42:32,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:42:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 00:42:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2019-12-27 00:42:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 00:42:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 00:42:32,842 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 00:42:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:32,842 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 00:42:32,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 00:42:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:32,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:32,843 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:33,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:33,044 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-27 00:42:33,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:33,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922591932] [2019-12-27 00:42:33,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:33,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922591932] [2019-12-27 00:42:33,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065554047] [2019-12-27 00:42:33,141 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:33,184 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:33,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:33,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:33,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:35,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:35,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:35,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352091635] [2019-12-27 00:42:35,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:35,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=150, Unknown=2, NotChecked=0, Total=240 [2019-12-27 00:42:35,146 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-27 00:42:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:35,604 INFO L93 Difference]: Finished difference Result 178 states and 406 transitions. [2019-12-27 00:42:35,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 00:42:35,604 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:35,606 INFO L225 Difference]: With dead ends: 178 [2019-12-27 00:42:35,606 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 00:42:35,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=212, Invalid=338, Unknown=2, NotChecked=0, Total=552 [2019-12-27 00:42:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 00:42:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2019-12-27 00:42:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 00:42:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-27 00:42:35,611 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-27 00:42:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:35,611 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-27 00:42:35,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-27 00:42:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:35,612 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:35,612 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:35,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:35,815 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-27 00:42:35,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:35,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158871357] [2019-12-27 00:42:35,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:35,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158871357] [2019-12-27 00:42:35,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357562092] [2019-12-27 00:42:35,891 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:35,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:35,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:35,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:35,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:36,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:36,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:36,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389291] [2019-12-27 00:42:36,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:36,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:36,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:36,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:36,021 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 16 states. [2019-12-27 00:42:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:36,183 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-27 00:42:36,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:36,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:36,185 INFO L225 Difference]: With dead ends: 175 [2019-12-27 00:42:36,185 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 00:42:36,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 00:42:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-27 00:42:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 00:42:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 00:42:36,189 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 00:42:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:36,190 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 00:42:36,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 00:42:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:36,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:36,191 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:36,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:36,392 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-27 00:42:36,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:36,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384022182] [2019-12-27 00:42:36,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:36,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384022182] [2019-12-27 00:42:36,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558164593] [2019-12-27 00:42:36,464 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:36,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:36,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:36,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:36,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:36,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98502488] [2019-12-27 00:42:36,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:36,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:36,619 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-27 00:42:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:36,923 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-27 00:42:36,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:36,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:36,925 INFO L225 Difference]: With dead ends: 201 [2019-12-27 00:42:36,925 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 00:42:36,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 00:42:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2019-12-27 00:42:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 00:42:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-27 00:42:36,931 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-27 00:42:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:36,932 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-27 00:42:36,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-27 00:42:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:36,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:36,932 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:37,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:37,134 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-27 00:42:37,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:37,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853708862] [2019-12-27 00:42:37,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:37,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853708862] [2019-12-27 00:42:37,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414931766] [2019-12-27 00:42:37,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:37,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:37,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:37,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:37,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:37,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:37,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:37,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864907439] [2019-12-27 00:42:37,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:37,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:37,382 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 16 states. [2019-12-27 00:42:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:38,201 INFO L93 Difference]: Finished difference Result 211 states and 478 transitions. [2019-12-27 00:42:38,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:38,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:38,203 INFO L225 Difference]: With dead ends: 211 [2019-12-27 00:42:38,203 INFO L226 Difference]: Without dead ends: 210 [2019-12-27 00:42:38,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-27 00:42:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2019-12-27 00:42:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 00:42:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 00:42:38,207 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 00:42:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:38,207 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 00:42:38,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 00:42:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:38,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:38,208 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:38,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:38,409 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-27 00:42:38,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:38,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174945846] [2019-12-27 00:42:38,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:38,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174945846] [2019-12-27 00:42:38,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820084269] [2019-12-27 00:42:38,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:38,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 00:42:38,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:38,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 00:42:38,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:38,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:38,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575921975] [2019-12-27 00:42:38,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:38,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:38,605 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-27 00:42:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:38,885 INFO L93 Difference]: Finished difference Result 207 states and 468 transitions. [2019-12-27 00:42:38,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:42:38,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:38,886 INFO L225 Difference]: With dead ends: 207 [2019-12-27 00:42:38,886 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 00:42:38,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:42:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 00:42:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2019-12-27 00:42:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 00:42:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 00:42:38,892 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-27 00:42:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:38,892 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 00:42:38,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 00:42:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:38,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:38,893 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:39,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:39,096 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:39,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-27 00:42:39,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:39,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748757952] [2019-12-27 00:42:39,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:39,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748757952] [2019-12-27 00:42:39,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82829831] [2019-12-27 00:42:39,166 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:39,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:39,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:39,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:39,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:39,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:39,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:39,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562637584] [2019-12-27 00:42:39,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:39,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:39,338 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-27 00:42:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:40,401 INFO L93 Difference]: Finished difference Result 207 states and 475 transitions. [2019-12-27 00:42:40,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:40,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:40,404 INFO L225 Difference]: With dead ends: 207 [2019-12-27 00:42:40,404 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 00:42:40,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 00:42:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2019-12-27 00:42:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:42:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 371 transitions. [2019-12-27 00:42:40,409 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 371 transitions. Word has length 13 [2019-12-27 00:42:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:40,410 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 371 transitions. [2019-12-27 00:42:40,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 371 transitions. [2019-12-27 00:42:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:40,411 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:40,411 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:40,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:40,612 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-27 00:42:40,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:40,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635087759] [2019-12-27 00:42:40,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:40,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635087759] [2019-12-27 00:42:40,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100646014] [2019-12-27 00:42:40,693 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:40,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:40,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:40,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:40,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:40,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:40,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:40,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114201941] [2019-12-27 00:42:40,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:40,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:40,896 INFO L87 Difference]: Start difference. First operand 152 states and 371 transitions. Second operand 16 states. [2019-12-27 00:42:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:41,256 INFO L93 Difference]: Finished difference Result 216 states and 496 transitions. [2019-12-27 00:42:41,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:41,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:41,258 INFO L225 Difference]: With dead ends: 216 [2019-12-27 00:42:41,259 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 00:42:41,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 00:42:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2019-12-27 00:42:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 00:42:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 00:42:41,263 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-27 00:42:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:41,263 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 00:42:41,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 00:42:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:41,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:41,264 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:41,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:41,467 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-27 00:42:41,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:41,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871882519] [2019-12-27 00:42:41,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:41,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871882519] [2019-12-27 00:42:41,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88888951] [2019-12-27 00:42:41,552 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:41,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:41,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:41,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:41,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:41,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:41,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:41,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278273387] [2019-12-27 00:42:41,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:41,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:41,758 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-27 00:42:42,184 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2019-12-27 00:42:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:42,762 INFO L93 Difference]: Finished difference Result 201 states and 460 transitions. [2019-12-27 00:42:42,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:42,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:42,764 INFO L225 Difference]: With dead ends: 201 [2019-12-27 00:42:42,764 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 00:42:42,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 00:42:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2019-12-27 00:42:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 00:42:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 359 transitions. [2019-12-27 00:42:42,768 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 359 transitions. Word has length 13 [2019-12-27 00:42:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:42,769 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 359 transitions. [2019-12-27 00:42:42,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 359 transitions. [2019-12-27 00:42:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:42,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:42,769 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:42,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:42,972 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-27 00:42:42,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:42,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025886786] [2019-12-27 00:42:42,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:43,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025886786] [2019-12-27 00:42:43,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318069505] [2019-12-27 00:42:43,045 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:43,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:43,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:43,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:43,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:43,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107549989] [2019-12-27 00:42:43,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:43,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:43,176 INFO L87 Difference]: Start difference. First operand 149 states and 359 transitions. Second operand 16 states. [2019-12-27 00:42:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:43,334 INFO L93 Difference]: Finished difference Result 175 states and 401 transitions. [2019-12-27 00:42:43,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:42:43,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:43,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:43,336 INFO L225 Difference]: With dead ends: 175 [2019-12-27 00:42:43,337 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 00:42:43,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-27 00:42:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 00:42:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 154. [2019-12-27 00:42:43,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:42:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-27 00:42:43,341 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-27 00:42:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:43,341 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-27 00:42:43,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:43,341 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-27 00:42:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:43,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:43,342 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:43,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:43,542 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-27 00:42:43,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:43,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029385367] [2019-12-27 00:42:43,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:43,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029385367] [2019-12-27 00:42:43,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507615291] [2019-12-27 00:42:43,616 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:43,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:43,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:43,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:43,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:43,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:43,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:43,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559251381] [2019-12-27 00:42:43,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:43,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:43,760 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-27 00:42:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:44,021 INFO L93 Difference]: Finished difference Result 197 states and 450 transitions. [2019-12-27 00:42:44,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:44,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:44,023 INFO L225 Difference]: With dead ends: 197 [2019-12-27 00:42:44,023 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 00:42:44,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 00:42:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2019-12-27 00:42:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 00:42:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 372 transitions. [2019-12-27 00:42:44,027 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 372 transitions. Word has length 13 [2019-12-27 00:42:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:44,027 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 372 transitions. [2019-12-27 00:42:44,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 372 transitions. [2019-12-27 00:42:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:44,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:44,028 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:44,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:44,230 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-27 00:42:44,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:44,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626538825] [2019-12-27 00:42:44,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:44,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626538825] [2019-12-27 00:42:44,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681138114] [2019-12-27 00:42:44,309 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:44,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:42:44,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:44,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:42:44,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:44,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:44,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:44,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090237078] [2019-12-27 00:42:44,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:44,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:44,474 INFO L87 Difference]: Start difference. First operand 153 states and 372 transitions. Second operand 16 states. [2019-12-27 00:42:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:44,781 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2019-12-27 00:42:44,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:44,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:44,783 INFO L225 Difference]: With dead ends: 219 [2019-12-27 00:42:44,783 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 00:42:44,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:42:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 00:42:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 154. [2019-12-27 00:42:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:42:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-27 00:42:44,787 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-27 00:42:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:44,788 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-27 00:42:44,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-27 00:42:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:44,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:44,788 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:44,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:44,989 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-27 00:42:44,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:44,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242942608] [2019-12-27 00:42:44,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:45,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242942608] [2019-12-27 00:42:45,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617683313] [2019-12-27 00:42:45,077 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:45,123 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:45,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:45,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:45,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:45,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:45,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:45,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545073056] [2019-12-27 00:42:45,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:45,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:45,219 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-27 00:42:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:45,537 INFO L93 Difference]: Finished difference Result 207 states and 472 transitions. [2019-12-27 00:42:45,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:42:45,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:45,539 INFO L225 Difference]: With dead ends: 207 [2019-12-27 00:42:45,539 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 00:42:45,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:42:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 00:42:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2019-12-27 00:42:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:42:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 368 transitions. [2019-12-27 00:42:45,544 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 368 transitions. Word has length 13 [2019-12-27 00:42:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:45,544 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 368 transitions. [2019-12-27 00:42:45,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 368 transitions. [2019-12-27 00:42:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:45,545 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:45,545 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:45,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:45,747 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:45,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:45,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-27 00:42:45,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:45,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216214593] [2019-12-27 00:42:45,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:45,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216214593] [2019-12-27 00:42:45,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473416336] [2019-12-27 00:42:45,822 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:45,862 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:45,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:45,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:45,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:45,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:45,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:45,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426934273] [2019-12-27 00:42:45,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:45,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:45,970 INFO L87 Difference]: Start difference. First operand 152 states and 368 transitions. Second operand 16 states. [2019-12-27 00:42:46,575 WARN L192 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 00:42:47,066 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 00:42:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:47,301 INFO L93 Difference]: Finished difference Result 222 states and 496 transitions. [2019-12-27 00:42:47,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:47,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:47,304 INFO L225 Difference]: With dead ends: 222 [2019-12-27 00:42:47,304 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 00:42:47,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:42:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 00:42:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 154. [2019-12-27 00:42:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:42:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-27 00:42:47,308 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-27 00:42:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:47,308 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-27 00:42:47,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-27 00:42:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:47,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:47,309 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:47,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:47,512 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-27 00:42:47,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:47,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413504997] [2019-12-27 00:42:47,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:47,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413504997] [2019-12-27 00:42:47,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920856693] [2019-12-27 00:42:47,595 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:47,639 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:42:47,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:47,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:47,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:47,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:47,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:47,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391274541] [2019-12-27 00:42:47,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:47,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:47,767 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-27 00:42:49,084 WARN L192 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-27 00:42:50,602 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 00:42:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:50,771 INFO L93 Difference]: Finished difference Result 237 states and 539 transitions. [2019-12-27 00:42:50,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:42:50,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:50,773 INFO L225 Difference]: With dead ends: 237 [2019-12-27 00:42:50,773 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 00:42:50,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=457, Unknown=1, NotChecked=0, Total=702 [2019-12-27 00:42:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 00:42:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-27 00:42:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 00:42:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-27 00:42:50,777 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-27 00:42:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:50,777 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-27 00:42:50,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-27 00:42:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:50,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:50,778 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:50,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:50,981 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-27 00:42:50,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:50,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132456558] [2019-12-27 00:42:50,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:51,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132456558] [2019-12-27 00:42:51,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914705926] [2019-12-27 00:42:51,062 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:51,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:51,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:51,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93922627] [2019-12-27 00:42:51,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:51,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:51,210 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-27 00:42:51,713 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 00:42:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:52,060 INFO L93 Difference]: Finished difference Result 235 states and 531 transitions. [2019-12-27 00:42:52,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:52,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:52,062 INFO L225 Difference]: With dead ends: 235 [2019-12-27 00:42:52,062 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 00:42:52,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:42:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 00:42:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 155. [2019-12-27 00:42:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 00:42:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 380 transitions. [2019-12-27 00:42:52,066 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 380 transitions. Word has length 13 [2019-12-27 00:42:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:52,066 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 380 transitions. [2019-12-27 00:42:52,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 380 transitions. [2019-12-27 00:42:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:52,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:52,067 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:52,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:52,267 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-27 00:42:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:52,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445269651] [2019-12-27 00:42:52,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:52,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445269651] [2019-12-27 00:42:52,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898627357] [2019-12-27 00:42:52,339 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:52,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:52,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:52,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:52,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:52,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:52,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:52,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776269661] [2019-12-27 00:42:52,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:52,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:52,490 INFO L87 Difference]: Start difference. First operand 155 states and 380 transitions. Second operand 16 states. [2019-12-27 00:42:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:52,802 INFO L93 Difference]: Finished difference Result 213 states and 487 transitions. [2019-12-27 00:42:52,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:42:52,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:52,804 INFO L225 Difference]: With dead ends: 213 [2019-12-27 00:42:52,804 INFO L226 Difference]: Without dead ends: 212 [2019-12-27 00:42:52,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:42:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-27 00:42:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2019-12-27 00:42:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 00:42:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-27 00:42:52,808 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-27 00:42:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:52,809 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-27 00:42:52,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-27 00:42:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:52,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:52,810 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:53,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:53,012 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-27 00:42:53,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:53,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011669181] [2019-12-27 00:42:53,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:53,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011669181] [2019-12-27 00:42:53,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075181811] [2019-12-27 00:42:53,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:53,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:42:53,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:53,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:53,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:53,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:53,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:53,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378099647] [2019-12-27 00:42:53,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:53,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:53,241 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-27 00:42:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:53,570 INFO L93 Difference]: Finished difference Result 224 states and 519 transitions. [2019-12-27 00:42:53,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:42:53,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:53,573 INFO L225 Difference]: With dead ends: 224 [2019-12-27 00:42:53,573 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 00:42:53,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 00:42:53,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2019-12-27 00:42:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 00:42:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-27 00:42:53,577 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-27 00:42:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:53,577 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-27 00:42:53,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-27 00:42:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:53,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:53,578 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:53,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:53,779 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-27 00:42:53,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:53,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188844192] [2019-12-27 00:42:53,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:53,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188844192] [2019-12-27 00:42:53,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141391793] [2019-12-27 00:42:53,850 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:53,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:42:53,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:53,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:53,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:53,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:53,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:53,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751460571] [2019-12-27 00:42:53,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:53,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:53,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:53,981 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-27 00:42:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:54,251 INFO L93 Difference]: Finished difference Result 233 states and 537 transitions. [2019-12-27 00:42:54,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:42:54,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:54,253 INFO L225 Difference]: With dead ends: 233 [2019-12-27 00:42:54,253 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 00:42:54,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 00:42:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2019-12-27 00:42:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 00:42:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-27 00:42:54,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-27 00:42:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:54,258 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-27 00:42:54,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-27 00:42:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:54,259 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:54,259 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:54,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:54,463 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-27 00:42:54,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:54,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634453850] [2019-12-27 00:42:54,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:54,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634453850] [2019-12-27 00:42:54,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330577533] [2019-12-27 00:42:54,540 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:54,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:42:54,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:54,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:54,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:54,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:54,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:54,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154198952] [2019-12-27 00:42:54,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:54,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:54,668 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-27 00:42:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:54,976 INFO L93 Difference]: Finished difference Result 225 states and 518 transitions. [2019-12-27 00:42:54,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:54,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:54,978 INFO L225 Difference]: With dead ends: 225 [2019-12-27 00:42:54,978 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 00:42:54,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:42:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 00:42:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2019-12-27 00:42:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 00:42:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-27 00:42:54,983 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-27 00:42:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:54,983 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-27 00:42:54,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-27 00:42:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:54,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:54,984 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:55,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:55,187 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-27 00:42:55,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:55,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267804191] [2019-12-27 00:42:55,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:55,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267804191] [2019-12-27 00:42:55,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17472680] [2019-12-27 00:42:55,260 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:55,302 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 00:42:55,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:55,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:55,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:55,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:55,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:55,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338659308] [2019-12-27 00:42:55,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:55,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:55,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:55,390 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-27 00:42:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:55,786 INFO L93 Difference]: Finished difference Result 222 states and 505 transitions. [2019-12-27 00:42:55,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:42:55,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:55,788 INFO L225 Difference]: With dead ends: 222 [2019-12-27 00:42:55,788 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 00:42:55,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:42:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 00:42:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-27 00:42:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:42:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-27 00:42:55,792 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-27 00:42:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:55,792 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-27 00:42:55,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-27 00:42:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:55,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:55,793 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:55,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:55,997 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-27 00:42:55,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:55,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914133791] [2019-12-27 00:42:55,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:56,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914133791] [2019-12-27 00:42:56,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751412590] [2019-12-27 00:42:56,071 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:56,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:56,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:56,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:56,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:56,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971111213] [2019-12-27 00:42:56,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:56,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:42:56,204 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-27 00:42:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:42:56,502 INFO L93 Difference]: Finished difference Result 188 states and 426 transitions. [2019-12-27 00:42:56,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:42:56,502 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:42:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:42:56,503 INFO L225 Difference]: With dead ends: 188 [2019-12-27 00:42:56,504 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 00:42:56,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-27 00:42:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 00:42:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2019-12-27 00:42:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:42:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-27 00:42:56,508 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-27 00:42:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:42:56,509 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-27 00:42:56,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:42:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-27 00:42:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:42:56,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:42:56,510 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:42:56,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:56,713 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:42:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:42:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-27 00:42:56,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:42:56,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96344815] [2019-12-27 00:42:56,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:42:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:42:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:56,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96344815] [2019-12-27 00:42:56,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181627511] [2019-12-27 00:42:56,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:42:56,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:42:56,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:42:56,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:42:56,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:42:58,695 WARN L192 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 00:42:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:42:58,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:42:58,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:42:58,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400374602] [2019-12-27 00:42:58,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:42:58,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:42:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:42:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=172, Unknown=3, NotChecked=0, Total=240 [2019-12-27 00:42:58,697 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-27 00:43:00,064 WARN L192 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-27 00:43:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:00,170 INFO L93 Difference]: Finished difference Result 204 states and 457 transitions. [2019-12-27 00:43:00,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:43:00,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:00,172 INFO L225 Difference]: With dead ends: 204 [2019-12-27 00:43:00,173 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 00:43:00,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=223, Invalid=476, Unknown=3, NotChecked=0, Total=702 [2019-12-27 00:43:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 00:43:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2019-12-27 00:43:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 00:43:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 369 transitions. [2019-12-27 00:43:00,177 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 369 transitions. Word has length 13 [2019-12-27 00:43:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:00,177 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 369 transitions. [2019-12-27 00:43:00,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 369 transitions. [2019-12-27 00:43:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:00,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:00,178 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:00,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:00,378 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-27 00:43:00,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:00,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381595695] [2019-12-27 00:43:00,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:00,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381595695] [2019-12-27 00:43:00,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071121480] [2019-12-27 00:43:00,453 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:00,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:43:00,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:00,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 00:43:00,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:00,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:00,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:00,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671126131] [2019-12-27 00:43:00,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:00,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:00,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:00,580 INFO L87 Difference]: Start difference. First operand 153 states and 369 transitions. Second operand 16 states. [2019-12-27 00:43:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:00,806 INFO L93 Difference]: Finished difference Result 203 states and 459 transitions. [2019-12-27 00:43:00,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:43:00,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:00,809 INFO L225 Difference]: With dead ends: 203 [2019-12-27 00:43:00,809 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 00:43:00,809 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 00:43:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 00:43:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2019-12-27 00:43:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:43:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-27 00:43:00,813 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-27 00:43:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:00,813 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-27 00:43:00,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-27 00:43:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:00,814 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:00,814 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:01,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:01,015 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-27 00:43:01,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:01,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584253562] [2019-12-27 00:43:01,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:01,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584253562] [2019-12-27 00:43:01,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292250007] [2019-12-27 00:43:01,101 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:01,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:43:01,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:01,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:01,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:01,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:01,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:01,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494348082] [2019-12-27 00:43:01,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:01,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2019-12-27 00:43:01,989 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-27 00:43:02,994 WARN L192 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 00:43:03,474 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-27 00:43:03,909 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-12-27 00:43:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:04,976 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-27 00:43:04,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:43:04,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:04,978 INFO L225 Difference]: With dead ends: 214 [2019-12-27 00:43:04,978 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 00:43:04,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=250, Invalid=505, Unknown=1, NotChecked=0, Total=756 [2019-12-27 00:43:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 00:43:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 154. [2019-12-27 00:43:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:43:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-27 00:43:04,982 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-27 00:43:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:04,983 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-27 00:43:04,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-27 00:43:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:04,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:04,983 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:05,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:05,184 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-27 00:43:05,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:05,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919931501] [2019-12-27 00:43:05,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:05,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919931501] [2019-12-27 00:43:05,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146266106] [2019-12-27 00:43:05,259 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:05,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:43:05,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:05,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:05,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:06,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:06,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:06,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421285591] [2019-12-27 00:43:06,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:06,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2019-12-27 00:43:06,976 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-27 00:43:07,557 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 00:43:08,021 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 00:43:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:08,105 INFO L93 Difference]: Finished difference Result 231 states and 518 transitions. [2019-12-27 00:43:08,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:43:08,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:08,107 INFO L225 Difference]: With dead ends: 231 [2019-12-27 00:43:08,108 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 00:43:08,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=240, Invalid=515, Unknown=1, NotChecked=0, Total=756 [2019-12-27 00:43:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 00:43:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 154. [2019-12-27 00:43:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:43:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-27 00:43:08,111 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-27 00:43:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:08,111 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-27 00:43:08,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-27 00:43:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:08,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:08,112 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:08,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:08,313 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-27 00:43:08,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:08,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114614835] [2019-12-27 00:43:08,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:08,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114614835] [2019-12-27 00:43:08,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349572170] [2019-12-27 00:43:08,387 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:08,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:43:08,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:08,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:08,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:08,973 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 00:43:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:08,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:08,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:08,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301862288] [2019-12-27 00:43:08,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:08,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:08,975 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-27 00:43:09,943 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-27 00:43:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:10,136 INFO L93 Difference]: Finished difference Result 218 states and 495 transitions. [2019-12-27 00:43:10,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:43:10,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:10,139 INFO L225 Difference]: With dead ends: 218 [2019-12-27 00:43:10,139 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 00:43:10,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=537, Unknown=1, NotChecked=0, Total=812 [2019-12-27 00:43:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 00:43:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2019-12-27 00:43:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 00:43:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-27 00:43:10,142 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-27 00:43:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:10,143 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-27 00:43:10,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-27 00:43:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:10,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:10,143 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:10,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:10,345 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-27 00:43:10,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:10,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901821864] [2019-12-27 00:43:10,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:10,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901821864] [2019-12-27 00:43:10,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769065392] [2019-12-27 00:43:10,414 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:10,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:10,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:10,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:10,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:10,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536494018] [2019-12-27 00:43:10,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:10,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:10,574 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-27 00:43:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:11,133 INFO L93 Difference]: Finished difference Result 202 states and 455 transitions. [2019-12-27 00:43:11,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:11,134 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:11,136 INFO L225 Difference]: With dead ends: 202 [2019-12-27 00:43:11,136 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 00:43:11,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:43:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 00:43:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2019-12-27 00:43:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 00:43:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-27 00:43:11,139 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-27 00:43:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:11,139 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-27 00:43:11,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-27 00:43:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:11,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:11,140 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:11,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:11,341 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-27 00:43:11,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:11,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376185286] [2019-12-27 00:43:11,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:11,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376185286] [2019-12-27 00:43:11,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918083782] [2019-12-27 00:43:11,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:11,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:11,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:11,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:11,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:17,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:17,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:17,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935055820] [2019-12-27 00:43:17,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:17,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:17,695 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-27 00:43:19,992 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 00:43:20,820 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 00:43:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:20,931 INFO L93 Difference]: Finished difference Result 223 states and 500 transitions. [2019-12-27 00:43:20,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:20,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:20,933 INFO L225 Difference]: With dead ends: 223 [2019-12-27 00:43:20,933 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 00:43:20,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:43:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 00:43:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2019-12-27 00:43:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 00:43:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-27 00:43:20,938 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-27 00:43:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:20,938 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-27 00:43:20,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-27 00:43:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:20,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:20,939 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:21,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:21,139 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-27 00:43:21,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:21,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201164855] [2019-12-27 00:43:21,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:21,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201164855] [2019-12-27 00:43:21,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080738081] [2019-12-27 00:43:21,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:21,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:43:21,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:21,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:21,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:21,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:21,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:21,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467067786] [2019-12-27 00:43:21,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:21,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:21,400 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-27 00:43:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:21,946 INFO L93 Difference]: Finished difference Result 246 states and 552 transitions. [2019-12-27 00:43:21,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:43:21,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:21,949 INFO L225 Difference]: With dead ends: 246 [2019-12-27 00:43:21,949 INFO L226 Difference]: Without dead ends: 244 [2019-12-27 00:43:21,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:43:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-27 00:43:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 157. [2019-12-27 00:43:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 00:43:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 385 transitions. [2019-12-27 00:43:21,954 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 385 transitions. Word has length 13 [2019-12-27 00:43:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:21,954 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 385 transitions. [2019-12-27 00:43:21,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 385 transitions. [2019-12-27 00:43:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:21,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:21,961 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:22,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:22,162 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-27 00:43:22,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:22,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630316927] [2019-12-27 00:43:22,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:22,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630316927] [2019-12-27 00:43:22,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215658036] [2019-12-27 00:43:22,236 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:22,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:43:22,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:22,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:22,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:22,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:22,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:22,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135190192] [2019-12-27 00:43:22,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:22,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:22,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:22,442 INFO L87 Difference]: Start difference. First operand 157 states and 385 transitions. Second operand 16 states. [2019-12-27 00:43:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:22,975 INFO L93 Difference]: Finished difference Result 232 states and 525 transitions. [2019-12-27 00:43:22,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:22,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:22,978 INFO L225 Difference]: With dead ends: 232 [2019-12-27 00:43:22,978 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 00:43:22,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:43:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 00:43:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 155. [2019-12-27 00:43:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 00:43:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-27 00:43:22,982 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-27 00:43:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:22,983 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-27 00:43:22,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-27 00:43:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:22,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:22,983 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:23,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:23,186 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-27 00:43:23,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:23,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620483677] [2019-12-27 00:43:23,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:23,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620483677] [2019-12-27 00:43:23,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725010269] [2019-12-27 00:43:23,261 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:23,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:43:23,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:23,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:23,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:23,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:23,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447151809] [2019-12-27 00:43:23,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:23,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:23,439 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-27 00:43:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:24,382 INFO L93 Difference]: Finished difference Result 242 states and 541 transitions. [2019-12-27 00:43:24,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:43:24,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:24,385 INFO L225 Difference]: With dead ends: 242 [2019-12-27 00:43:24,385 INFO L226 Difference]: Without dead ends: 240 [2019-12-27 00:43:24,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:43:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-27 00:43:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 156. [2019-12-27 00:43:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 00:43:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-27 00:43:24,389 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-27 00:43:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:24,389 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-27 00:43:24,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-27 00:43:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:24,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:24,390 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:24,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:24,591 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-27 00:43:24,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:24,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466083514] [2019-12-27 00:43:24,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:24,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466083514] [2019-12-27 00:43:24,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752640797] [2019-12-27 00:43:24,668 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:24,714 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:43:24,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:24,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:24,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:24,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:24,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:24,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10833854] [2019-12-27 00:43:24,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:24,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:24,828 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-27 00:43:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:25,178 INFO L93 Difference]: Finished difference Result 199 states and 461 transitions. [2019-12-27 00:43:25,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:43:25,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:25,180 INFO L225 Difference]: With dead ends: 199 [2019-12-27 00:43:25,180 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 00:43:25,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:43:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 00:43:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2019-12-27 00:43:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 00:43:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-27 00:43:25,184 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-27 00:43:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:25,184 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-27 00:43:25,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-27 00:43:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:25,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:25,184 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:25,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:25,385 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-27 00:43:25,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:25,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084587496] [2019-12-27 00:43:25,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:25,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084587496] [2019-12-27 00:43:25,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174529877] [2019-12-27 00:43:25,461 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:25,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:25,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:25,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:25,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:25,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920710465] [2019-12-27 00:43:25,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:25,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:25,598 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-27 00:43:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:26,014 INFO L93 Difference]: Finished difference Result 234 states and 538 transitions. [2019-12-27 00:43:26,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:26,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:26,017 INFO L225 Difference]: With dead ends: 234 [2019-12-27 00:43:26,017 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 00:43:26,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:43:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 00:43:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 158. [2019-12-27 00:43:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 00:43:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-27 00:43:26,022 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-27 00:43:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:26,022 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-27 00:43:26,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-27 00:43:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:26,023 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:26,023 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:26,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:26,225 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-27 00:43:26,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:26,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462446442] [2019-12-27 00:43:26,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:26,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462446442] [2019-12-27 00:43:26,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678185244] [2019-12-27 00:43:26,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:26,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:26,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:26,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:26,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:26,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:26,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:26,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200637930] [2019-12-27 00:43:26,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:26,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:26,448 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-27 00:43:27,008 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-27 00:43:27,681 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-27 00:43:28,149 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-27 00:43:29,543 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-27 00:43:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:29,568 INFO L93 Difference]: Finished difference Result 238 states and 542 transitions. [2019-12-27 00:43:29,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:29,569 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:29,571 INFO L225 Difference]: With dead ends: 238 [2019-12-27 00:43:29,571 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 00:43:29,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-27 00:43:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 00:43:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-27 00:43:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 00:43:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-27 00:43:29,576 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-27 00:43:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:29,576 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-27 00:43:29,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-27 00:43:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:29,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:29,577 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:29,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:29,777 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-27 00:43:29,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:29,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782400496] [2019-12-27 00:43:29,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:29,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782400496] [2019-12-27 00:43:29,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149404663] [2019-12-27 00:43:29,859 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:29,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 00:43:29,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:29,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:29,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:30,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:30,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:30,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150256456] [2019-12-27 00:43:30,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:30,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:30,006 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-27 00:43:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:30,440 INFO L93 Difference]: Finished difference Result 245 states and 559 transitions. [2019-12-27 00:43:30,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:43:30,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:30,443 INFO L225 Difference]: With dead ends: 245 [2019-12-27 00:43:30,444 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 00:43:30,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:43:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 00:43:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2019-12-27 00:43:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 00:43:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-27 00:43:30,457 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-27 00:43:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:30,457 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-27 00:43:30,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-27 00:43:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:30,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:30,458 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:30,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:30,658 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:30,659 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-27 00:43:30,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:30,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125990422] [2019-12-27 00:43:30,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:30,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125990422] [2019-12-27 00:43:30,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884971485] [2019-12-27 00:43:30,734 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:30,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:43:30,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:30,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:30,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:30,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:30,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:30,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798835566] [2019-12-27 00:43:30,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:30,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:30,858 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-27 00:43:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:31,225 INFO L93 Difference]: Finished difference Result 245 states and 557 transitions. [2019-12-27 00:43:31,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:43:31,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:31,228 INFO L225 Difference]: With dead ends: 245 [2019-12-27 00:43:31,228 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 00:43:31,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:43:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 00:43:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 159. [2019-12-27 00:43:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 00:43:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-27 00:43:31,233 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-27 00:43:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:31,234 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-27 00:43:31,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-27 00:43:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:31,234 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:31,234 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:31,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:31,435 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-27 00:43:31,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:31,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798525372] [2019-12-27 00:43:31,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:31,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798525372] [2019-12-27 00:43:31,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811169167] [2019-12-27 00:43:31,506 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:31,549 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:43:31,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:31,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:31,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:31,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:31,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:31,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576087034] [2019-12-27 00:43:31,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:31,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:31,692 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-27 00:43:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:32,002 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2019-12-27 00:43:32,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:43:32,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:32,003 INFO L225 Difference]: With dead ends: 235 [2019-12-27 00:43:32,004 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 00:43:32,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:43:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 00:43:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 160. [2019-12-27 00:43:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 00:43:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 397 transitions. [2019-12-27 00:43:32,009 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 397 transitions. Word has length 13 [2019-12-27 00:43:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:32,009 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 397 transitions. [2019-12-27 00:43:32,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 397 transitions. [2019-12-27 00:43:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:32,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:32,010 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:32,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:32,214 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-27 00:43:32,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:32,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614296921] [2019-12-27 00:43:32,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:32,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614296921] [2019-12-27 00:43:32,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61579696] [2019-12-27 00:43:32,298 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:32,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:43:32,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:32,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:32,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:32,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:32,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:32,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072479292] [2019-12-27 00:43:32,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:32,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:32,432 INFO L87 Difference]: Start difference. First operand 160 states and 397 transitions. Second operand 16 states. [2019-12-27 00:43:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:32,850 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2019-12-27 00:43:32,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:43:32,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:32,851 INFO L225 Difference]: With dead ends: 239 [2019-12-27 00:43:32,851 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 00:43:32,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:43:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 00:43:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-27 00:43:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 00:43:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-27 00:43:32,855 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-27 00:43:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:32,855 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-27 00:43:32,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-27 00:43:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:32,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:32,856 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:33,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:33,057 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-27 00:43:33,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:33,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152950613] [2019-12-27 00:43:33,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:33,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152950613] [2019-12-27 00:43:33,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812260838] [2019-12-27 00:43:33,134 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:33,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:33,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:34,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:34,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:34,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797261469] [2019-12-27 00:43:34,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:34,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-27 00:43:34,856 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-27 00:43:36,491 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 00:43:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:36,519 INFO L93 Difference]: Finished difference Result 240 states and 547 transitions. [2019-12-27 00:43:36,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:43:36,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:36,521 INFO L225 Difference]: With dead ends: 240 [2019-12-27 00:43:36,521 INFO L226 Difference]: Without dead ends: 239 [2019-12-27 00:43:36,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=275, Invalid=535, Unknown=2, NotChecked=0, Total=812 [2019-12-27 00:43:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-27 00:43:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 158. [2019-12-27 00:43:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 00:43:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-27 00:43:36,526 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-27 00:43:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:36,526 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-27 00:43:36,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-27 00:43:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:36,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:36,527 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:36,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:36,730 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-27 00:43:36,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:36,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116987312] [2019-12-27 00:43:36,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:36,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116987312] [2019-12-27 00:43:36,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896969035] [2019-12-27 00:43:36,802 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:36,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:36,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:36,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:36,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:37,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:37,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:37,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900048679] [2019-12-27 00:43:37,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:37,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:37,194 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-27 00:43:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:38,733 INFO L93 Difference]: Finished difference Result 237 states and 538 transitions. [2019-12-27 00:43:38,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:43:38,733 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:38,734 INFO L225 Difference]: With dead ends: 237 [2019-12-27 00:43:38,734 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 00:43:38,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:43:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 00:43:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2019-12-27 00:43:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 00:43:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-27 00:43:38,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-27 00:43:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:38,739 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-27 00:43:38,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-27 00:43:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:38,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:38,740 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:38,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:38,942 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:38,945 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-27 00:43:38,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:38,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920197144] [2019-12-27 00:43:38,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:39,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920197144] [2019-12-27 00:43:39,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794045348] [2019-12-27 00:43:39,012 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:39,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:43:39,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:39,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 00:43:39,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:39,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:39,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 00:43:39,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82213125] [2019-12-27 00:43:39,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 00:43:39,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 00:43:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 00:43:39,195 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-27 00:43:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:39,471 INFO L93 Difference]: Finished difference Result 179 states and 409 transitions. [2019-12-27 00:43:39,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:43:39,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 00:43:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:39,473 INFO L225 Difference]: With dead ends: 179 [2019-12-27 00:43:39,473 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 00:43:39,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-27 00:43:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 00:43:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 156. [2019-12-27 00:43:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 00:43:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 369 transitions. [2019-12-27 00:43:39,477 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 369 transitions. Word has length 13 [2019-12-27 00:43:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:39,478 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 369 transitions. [2019-12-27 00:43:39,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 00:43:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 369 transitions. [2019-12-27 00:43:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 00:43:39,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:39,479 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:39,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:39,682 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:39,682 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 00:43:39,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:39,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570631928] [2019-12-27 00:43:39,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:39,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570631928] [2019-12-27 00:43:39,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129459823] [2019-12-27 00:43:39,768 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:39,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 00:43:39,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:39,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 00:43:39,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 00:43:39,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025659876] [2019-12-27 00:43:39,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 00:43:39,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:39,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 00:43:39,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:43:39,880 INFO L87 Difference]: Start difference. First operand 156 states and 369 transitions. Second operand 9 states. [2019-12-27 00:43:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:39,907 INFO L93 Difference]: Finished difference Result 206 states and 491 transitions. [2019-12-27 00:43:39,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 00:43:39,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 00:43:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:39,908 INFO L225 Difference]: With dead ends: 206 [2019-12-27 00:43:39,908 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 00:43:39,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-27 00:43:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 00:43:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-12-27 00:43:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-27 00:43:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 476 transitions. [2019-12-27 00:43:39,912 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 476 transitions. Word has length 13 [2019-12-27 00:43:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:39,913 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 476 transitions. [2019-12-27 00:43:39,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 00:43:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 476 transitions. [2019-12-27 00:43:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:39,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:39,913 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:40,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:40,114 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 94 times [2019-12-27 00:43:40,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:40,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729776176] [2019-12-27 00:43:40,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:40,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729776176] [2019-12-27 00:43:40,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035379313] [2019-12-27 00:43:40,192 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:40,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:43:40,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:40,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:40,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:40,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:40,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:40,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682560768] [2019-12-27 00:43:40,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:40,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:40,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:40,365 INFO L87 Difference]: Start difference. First operand 198 states and 476 transitions. Second operand 18 states. [2019-12-27 00:43:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:40,569 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2019-12-27 00:43:40,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:43:40,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:40,571 INFO L225 Difference]: With dead ends: 215 [2019-12-27 00:43:40,571 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 00:43:40,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:43:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 00:43:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2019-12-27 00:43:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 00:43:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 474 transitions. [2019-12-27 00:43:40,575 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 474 transitions. Word has length 14 [2019-12-27 00:43:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:40,575 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 474 transitions. [2019-12-27 00:43:40,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 474 transitions. [2019-12-27 00:43:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:40,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:40,576 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:40,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:40,779 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 95 times [2019-12-27 00:43:40,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:40,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341647898] [2019-12-27 00:43:40,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:40,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341647898] [2019-12-27 00:43:40,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688009146] [2019-12-27 00:43:40,858 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:40,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:43:40,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:40,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:40,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:41,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:41,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:41,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110339781] [2019-12-27 00:43:41,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:41,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:41,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:41,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:41,040 INFO L87 Difference]: Start difference. First operand 196 states and 474 transitions. Second operand 18 states. [2019-12-27 00:43:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:41,262 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-27 00:43:41,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:43:41,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:41,264 INFO L225 Difference]: With dead ends: 227 [2019-12-27 00:43:41,264 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 00:43:41,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:43:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 00:43:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2019-12-27 00:43:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-27 00:43:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 482 transitions. [2019-12-27 00:43:41,271 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 482 transitions. Word has length 14 [2019-12-27 00:43:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:41,271 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 482 transitions. [2019-12-27 00:43:41,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 482 transitions. [2019-12-27 00:43:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:41,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:41,272 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:41,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:41,475 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 96 times [2019-12-27 00:43:41,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:41,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972386723] [2019-12-27 00:43:41,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:41,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972386723] [2019-12-27 00:43:41,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431792802] [2019-12-27 00:43:41,557 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:41,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:43:41,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:41,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 00:43:41,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:41,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:41,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:41,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081129641] [2019-12-27 00:43:41,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:41,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:41,742 INFO L87 Difference]: Start difference. First operand 198 states and 482 transitions. Second operand 18 states. [2019-12-27 00:43:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:41,984 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2019-12-27 00:43:41,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 00:43:41,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:41,985 INFO L225 Difference]: With dead ends: 225 [2019-12-27 00:43:41,986 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 00:43:41,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:43:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 00:43:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2019-12-27 00:43:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-27 00:43:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 481 transitions. [2019-12-27 00:43:41,990 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 481 transitions. Word has length 14 [2019-12-27 00:43:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:41,990 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 481 transitions. [2019-12-27 00:43:41,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 481 transitions. [2019-12-27 00:43:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:41,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:41,991 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:42,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:42,192 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:42,192 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 97 times [2019-12-27 00:43:42,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:42,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681303764] [2019-12-27 00:43:42,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:42,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681303764] [2019-12-27 00:43:42,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688658889] [2019-12-27 00:43:42,295 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:42,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:42,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:42,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:42,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:42,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301832076] [2019-12-27 00:43:42,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:42,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:42,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:42,457 INFO L87 Difference]: Start difference. First operand 198 states and 481 transitions. Second operand 18 states. [2019-12-27 00:43:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:42,668 INFO L93 Difference]: Finished difference Result 235 states and 552 transitions. [2019-12-27 00:43:42,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:43:42,668 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:42,669 INFO L225 Difference]: With dead ends: 235 [2019-12-27 00:43:42,669 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 00:43:42,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:43:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 00:43:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2019-12-27 00:43:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 00:43:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-27 00:43:42,672 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-27 00:43:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:42,672 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-27 00:43:42,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-27 00:43:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:42,673 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:42,673 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:42,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:42,874 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 98 times [2019-12-27 00:43:42,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:42,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343130447] [2019-12-27 00:43:42,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:42,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343130447] [2019-12-27 00:43:42,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575367496] [2019-12-27 00:43:42,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:43,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:43,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:43,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:43,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:43,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:43,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:43,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787689268] [2019-12-27 00:43:43,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:43,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:43,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:43:43,597 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-27 00:43:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:43,874 INFO L93 Difference]: Finished difference Result 250 states and 583 transitions. [2019-12-27 00:43:43,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:43:43,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:43,875 INFO L225 Difference]: With dead ends: 250 [2019-12-27 00:43:43,876 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 00:43:43,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=409, Unknown=1, NotChecked=0, Total=650 [2019-12-27 00:43:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 00:43:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 200. [2019-12-27 00:43:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 00:43:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-27 00:43:43,881 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-27 00:43:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:43,881 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-27 00:43:43,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-27 00:43:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:43,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:43,881 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:44,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:44,082 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 99 times [2019-12-27 00:43:44,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:44,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753943733] [2019-12-27 00:43:44,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:44,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753943733] [2019-12-27 00:43:44,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399449209] [2019-12-27 00:43:44,169 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:44,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:43:44,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:44,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:44,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:45,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:45,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:45,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582265517] [2019-12-27 00:43:45,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:45,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:43:45,178 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-27 00:43:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:45,485 INFO L93 Difference]: Finished difference Result 260 states and 602 transitions. [2019-12-27 00:43:45,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 00:43:45,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:45,486 INFO L225 Difference]: With dead ends: 260 [2019-12-27 00:43:45,486 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 00:43:45,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=247, Invalid=454, Unknown=1, NotChecked=0, Total=702 [2019-12-27 00:43:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 00:43:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2019-12-27 00:43:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 00:43:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-27 00:43:45,491 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-27 00:43:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:45,491 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-27 00:43:45,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-27 00:43:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:45,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:45,492 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:45,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:45,695 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 100 times [2019-12-27 00:43:45,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:45,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665536676] [2019-12-27 00:43:45,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:45,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665536676] [2019-12-27 00:43:45,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666213674] [2019-12-27 00:43:45,775 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:45,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:43:45,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:45,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:45,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:45,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:45,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:45,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921382859] [2019-12-27 00:43:45,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:45,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:45,942 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-27 00:43:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:46,163 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-27 00:43:46,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:43:46,164 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:46,165 INFO L225 Difference]: With dead ends: 238 [2019-12-27 00:43:46,165 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 00:43:46,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:43:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 00:43:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-27 00:43:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 00:43:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 00:43:46,170 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 00:43:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:46,170 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 00:43:46,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 00:43:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:46,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:46,170 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:46,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:46,371 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 101 times [2019-12-27 00:43:46,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:46,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586304148] [2019-12-27 00:43:46,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:46,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586304148] [2019-12-27 00:43:46,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627462541] [2019-12-27 00:43:46,454 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:46,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:43:46,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:46,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:46,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:46,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:46,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:46,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604425212] [2019-12-27 00:43:46,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:46,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:46,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:46,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:46,683 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-27 00:43:47,300 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 00:43:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:48,085 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-27 00:43:48,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:43:48,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:48,087 INFO L225 Difference]: With dead ends: 275 [2019-12-27 00:43:48,087 INFO L226 Difference]: Without dead ends: 274 [2019-12-27 00:43:48,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=273, Invalid=482, Unknown=1, NotChecked=0, Total=756 [2019-12-27 00:43:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-27 00:43:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 203. [2019-12-27 00:43:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 00:43:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 00:43:48,092 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 00:43:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:48,092 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 00:43:48,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 00:43:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:48,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:48,093 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:48,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:48,293 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 102 times [2019-12-27 00:43:48,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:48,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949509821] [2019-12-27 00:43:48,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:48,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949509821] [2019-12-27 00:43:48,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187260916] [2019-12-27 00:43:48,375 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:48,420 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:43:48,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:48,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:48,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:50,974 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 00:43:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:50,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:50,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:50,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433023878] [2019-12-27 00:43:50,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:50,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=205, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:43:50,977 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-27 00:43:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:52,011 INFO L93 Difference]: Finished difference Result 285 states and 656 transitions. [2019-12-27 00:43:52,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:43:52,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:52,018 INFO L225 Difference]: With dead ends: 285 [2019-12-27 00:43:52,018 INFO L226 Difference]: Without dead ends: 284 [2019-12-27 00:43:52,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=258, Invalid=496, Unknown=2, NotChecked=0, Total=756 [2019-12-27 00:43:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-12-27 00:43:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2019-12-27 00:43:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 00:43:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-27 00:43:52,022 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-27 00:43:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:52,022 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-27 00:43:52,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-27 00:43:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:52,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:52,022 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:52,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:52,223 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 103 times [2019-12-27 00:43:52,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:52,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704756688] [2019-12-27 00:43:52,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:52,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704756688] [2019-12-27 00:43:52,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296433865] [2019-12-27 00:43:52,302 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:52,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:52,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:53,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:53,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:53,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503095866] [2019-12-27 00:43:53,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:53,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=200, Unknown=2, NotChecked=0, Total=306 [2019-12-27 00:43:53,343 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 18 states. [2019-12-27 00:43:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:56,335 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-27 00:43:56,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:43:56,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:56,337 INFO L225 Difference]: With dead ends: 275 [2019-12-27 00:43:56,337 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 00:43:56,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=321, Invalid=543, Unknown=6, NotChecked=0, Total=870 [2019-12-27 00:43:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 00:43:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2019-12-27 00:43:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 00:43:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-27 00:43:56,342 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-27 00:43:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:56,342 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-27 00:43:56,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-27 00:43:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:56,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:56,343 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:56,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:56,543 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 104 times [2019-12-27 00:43:56,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:56,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873986296] [2019-12-27 00:43:56,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:43:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:56,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873986296] [2019-12-27 00:43:56,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539934158] [2019-12-27 00:43:56,656 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:56,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:43:56,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:43:56,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:43:56,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:43:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:43:57,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:43:57,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:43:57,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563293458] [2019-12-27 00:43:57,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:43:57,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:43:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:43:57,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:43:57,742 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-27 00:43:58,251 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 00:43:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:43:59,709 INFO L93 Difference]: Finished difference Result 278 states and 646 transitions. [2019-12-27 00:43:59,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:43:59,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:43:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:43:59,711 INFO L225 Difference]: With dead ends: 278 [2019-12-27 00:43:59,711 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 00:43:59,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=490, Unknown=2, NotChecked=0, Total=756 [2019-12-27 00:43:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 00:43:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 206. [2019-12-27 00:43:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 00:43:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 511 transitions. [2019-12-27 00:43:59,715 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 511 transitions. Word has length 14 [2019-12-27 00:43:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:43:59,715 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 511 transitions. [2019-12-27 00:43:59,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:43:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 511 transitions. [2019-12-27 00:43:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:43:59,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:43:59,716 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:43:59,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:43:59,916 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:43:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:43:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 105 times [2019-12-27 00:43:59,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:43:59,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13310570] [2019-12-27 00:43:59,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:43:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:00,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13310570] [2019-12-27 00:44:00,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39093076] [2019-12-27 00:44:00,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:00,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:44:00,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:00,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:00,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:01,695 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 00:44:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:01,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:01,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:01,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254461004] [2019-12-27 00:44:01,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:01,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:01,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=198, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:44:01,698 INFO L87 Difference]: Start difference. First operand 206 states and 511 transitions. Second operand 18 states. [2019-12-27 00:44:02,531 WARN L192 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-12-27 00:44:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:03,170 INFO L93 Difference]: Finished difference Result 302 states and 701 transitions. [2019-12-27 00:44:03,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:44:03,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:03,171 INFO L225 Difference]: With dead ends: 302 [2019-12-27 00:44:03,171 INFO L226 Difference]: Without dead ends: 301 [2019-12-27 00:44:03,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=278, Invalid=477, Unknown=1, NotChecked=0, Total=756 [2019-12-27 00:44:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-27 00:44:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2019-12-27 00:44:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 00:44:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-27 00:44:03,175 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-27 00:44:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:03,176 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-27 00:44:03,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-27 00:44:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:03,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:03,176 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:03,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:03,377 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 106 times [2019-12-27 00:44:03,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:03,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710522940] [2019-12-27 00:44:03,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:03,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710522940] [2019-12-27 00:44:03,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228128751] [2019-12-27 00:44:03,458 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:03,503 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:44:03,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:03,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:03,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:04,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:04,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:04,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039374743] [2019-12-27 00:44:04,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:04,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:04,347 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-27 00:44:06,469 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 00:44:09,367 WARN L192 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-27 00:44:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:12,834 INFO L93 Difference]: Finished difference Result 266 states and 623 transitions. [2019-12-27 00:44:12,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:44:12,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:12,835 INFO L225 Difference]: With dead ends: 266 [2019-12-27 00:44:12,836 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 00:44:12,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=273, Invalid=481, Unknown=2, NotChecked=0, Total=756 [2019-12-27 00:44:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 00:44:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-27 00:44:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 00:44:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-27 00:44:12,840 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-27 00:44:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:12,840 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-27 00:44:12,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-27 00:44:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:12,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:12,841 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:13,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:13,042 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 107 times [2019-12-27 00:44:13,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:13,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641717747] [2019-12-27 00:44:13,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:13,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641717747] [2019-12-27 00:44:13,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373972486] [2019-12-27 00:44:13,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:13,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:44:13,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:13,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:13,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:13,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:13,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:13,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636971201] [2019-12-27 00:44:13,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:13,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:13,285 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 18 states. [2019-12-27 00:44:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:13,485 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-27 00:44:13,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 00:44:13,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:13,487 INFO L225 Difference]: With dead ends: 236 [2019-12-27 00:44:13,487 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 00:44:13,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-27 00:44:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 00:44:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-27 00:44:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 00:44:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 00:44:13,492 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 00:44:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:13,492 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 00:44:13,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 00:44:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:13,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:13,493 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:13,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:13,693 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 108 times [2019-12-27 00:44:13,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:13,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545291827] [2019-12-27 00:44:13,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:13,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545291827] [2019-12-27 00:44:13,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581668264] [2019-12-27 00:44:13,800 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:13,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:44:13,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:13,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 00:44:13,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:13,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:13,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:13,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073042494] [2019-12-27 00:44:13,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:13,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:13,938 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-27 00:44:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:14,200 INFO L93 Difference]: Finished difference Result 282 states and 657 transitions. [2019-12-27 00:44:14,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:44:14,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:14,202 INFO L225 Difference]: With dead ends: 282 [2019-12-27 00:44:14,202 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 00:44:14,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 00:44:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 00:44:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2019-12-27 00:44:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 00:44:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 00:44:14,207 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 00:44:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:14,208 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 00:44:14,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 00:44:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:14,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:14,208 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:14,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:14,412 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 109 times [2019-12-27 00:44:14,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:14,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586196121] [2019-12-27 00:44:14,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:14,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586196121] [2019-12-27 00:44:14,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092587153] [2019-12-27 00:44:14,494 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:14,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:14,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:14,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:14,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:14,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318211569] [2019-12-27 00:44:14,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:14,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:14,688 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-27 00:44:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:15,148 INFO L93 Difference]: Finished difference Result 310 states and 719 transitions. [2019-12-27 00:44:15,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:44:15,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:15,150 INFO L225 Difference]: With dead ends: 310 [2019-12-27 00:44:15,150 INFO L226 Difference]: Without dead ends: 309 [2019-12-27 00:44:15,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:44:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-27 00:44:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 209. [2019-12-27 00:44:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 00:44:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 00:44:15,155 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 00:44:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:15,155 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 00:44:15,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 00:44:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:15,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:15,156 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:15,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:15,357 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 110 times [2019-12-27 00:44:15,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:15,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092679825] [2019-12-27 00:44:15,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:15,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092679825] [2019-12-27 00:44:15,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554425033] [2019-12-27 00:44:15,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:15,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:44:15,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:15,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:15,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:15,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:15,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:15,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707039533] [2019-12-27 00:44:15,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:15,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:15,676 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 18 states. [2019-12-27 00:44:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:16,171 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-27 00:44:16,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:16,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:16,173 INFO L225 Difference]: With dead ends: 288 [2019-12-27 00:44:16,173 INFO L226 Difference]: Without dead ends: 287 [2019-12-27 00:44:16,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:44:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-27 00:44:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2019-12-27 00:44:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 00:44:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 00:44:16,177 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 00:44:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:16,177 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 00:44:16,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 00:44:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:16,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:16,178 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:16,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:16,379 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 111 times [2019-12-27 00:44:16,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:16,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979170309] [2019-12-27 00:44:16,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:16,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979170309] [2019-12-27 00:44:16,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977127054] [2019-12-27 00:44:16,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:16,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:44:16,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:16,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 00:44:16,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:16,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:16,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:16,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463372446] [2019-12-27 00:44:16,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:16,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:16,679 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-27 00:44:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:17,416 INFO L93 Difference]: Finished difference Result 336 states and 770 transitions. [2019-12-27 00:44:17,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:44:17,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:17,418 INFO L225 Difference]: With dead ends: 336 [2019-12-27 00:44:17,418 INFO L226 Difference]: Without dead ends: 326 [2019-12-27 00:44:17,419 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 00:44:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-27 00:44:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 218. [2019-12-27 00:44:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 00:44:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 552 transitions. [2019-12-27 00:44:17,424 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 552 transitions. Word has length 14 [2019-12-27 00:44:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:17,425 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 552 transitions. [2019-12-27 00:44:17,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 552 transitions. [2019-12-27 00:44:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:17,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:17,426 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:17,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:17,629 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 112 times [2019-12-27 00:44:17,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:17,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759985757] [2019-12-27 00:44:17,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:17,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759985757] [2019-12-27 00:44:17,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394429583] [2019-12-27 00:44:17,711 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:17,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:44:17,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:17,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:17,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:17,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:17,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:17,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879938966] [2019-12-27 00:44:17,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:17,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:17,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:17,938 INFO L87 Difference]: Start difference. First operand 218 states and 552 transitions. Second operand 18 states. [2019-12-27 00:44:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:18,458 INFO L93 Difference]: Finished difference Result 333 states and 775 transitions. [2019-12-27 00:44:18,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:18,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:18,460 INFO L225 Difference]: With dead ends: 333 [2019-12-27 00:44:18,460 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 00:44:18,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:44:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 00:44:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 220. [2019-12-27 00:44:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-27 00:44:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-27 00:44:18,466 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-27 00:44:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:18,466 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-27 00:44:18,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-27 00:44:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:18,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:18,467 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:18,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:18,670 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 113 times [2019-12-27 00:44:18,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:18,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187228934] [2019-12-27 00:44:18,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:18,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187228934] [2019-12-27 00:44:18,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581938038] [2019-12-27 00:44:18,771 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:18,813 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 00:44:18,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:18,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:18,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:19,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:19,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992382783] [2019-12-27 00:44:19,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:19,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:19,186 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-27 00:44:19,705 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-27 00:44:21,788 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-27 00:44:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:28,515 INFO L93 Difference]: Finished difference Result 330 states and 765 transitions. [2019-12-27 00:44:28,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:44:28,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:28,517 INFO L225 Difference]: With dead ends: 330 [2019-12-27 00:44:28,517 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 00:44:28,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:44:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 00:44:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 220. [2019-12-27 00:44:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-27 00:44:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-27 00:44:28,522 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-27 00:44:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:28,523 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-27 00:44:28,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-27 00:44:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:28,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:28,524 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:28,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:28,725 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 114 times [2019-12-27 00:44:28,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:28,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265878052] [2019-12-27 00:44:28,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:28,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265878052] [2019-12-27 00:44:28,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255974722] [2019-12-27 00:44:28,832 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:28,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 00:44:28,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:28,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:28,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:29,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:29,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:29,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642950105] [2019-12-27 00:44:29,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:29,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:29,025 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-27 00:44:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:30,087 INFO L93 Difference]: Finished difference Result 287 states and 678 transitions. [2019-12-27 00:44:30,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:30,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:30,089 INFO L225 Difference]: With dead ends: 287 [2019-12-27 00:44:30,089 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 00:44:30,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:44:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 00:44:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2019-12-27 00:44:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:44:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-27 00:44:30,094 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-27 00:44:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:30,094 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-27 00:44:30,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-27 00:44:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:30,095 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:30,095 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:30,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:30,295 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 115 times [2019-12-27 00:44:30,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:30,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174880095] [2019-12-27 00:44:30,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:30,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174880095] [2019-12-27 00:44:30,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541203288] [2019-12-27 00:44:30,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:30,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:30,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:36,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:36,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:36,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327260335] [2019-12-27 00:44:36,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:36,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:36,753 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-27 00:44:39,356 WARN L192 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 00:44:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:43,691 INFO L93 Difference]: Finished difference Result 322 states and 757 transitions. [2019-12-27 00:44:43,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:43,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:43,693 INFO L225 Difference]: With dead ends: 322 [2019-12-27 00:44:43,693 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 00:44:43,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:44:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 00:44:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 221. [2019-12-27 00:44:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 00:44:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 564 transitions. [2019-12-27 00:44:43,698 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 564 transitions. Word has length 14 [2019-12-27 00:44:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:43,698 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 564 transitions. [2019-12-27 00:44:43,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 564 transitions. [2019-12-27 00:44:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:43,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:43,698 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:43,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:43,899 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 116 times [2019-12-27 00:44:43,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:43,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653612822] [2019-12-27 00:44:43,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:43,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653612822] [2019-12-27 00:44:43,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019299980] [2019-12-27 00:44:43,996 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:44,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:44:44,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:44,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:44,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:44,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:44,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:44,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928081834] [2019-12-27 00:44:44,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:44,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:44,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:44,226 INFO L87 Difference]: Start difference. First operand 221 states and 564 transitions. Second operand 18 states. [2019-12-27 00:44:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:44,724 INFO L93 Difference]: Finished difference Result 329 states and 769 transitions. [2019-12-27 00:44:44,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:44,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:44,727 INFO L225 Difference]: With dead ends: 329 [2019-12-27 00:44:44,727 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 00:44:44,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-27 00:44:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 00:44:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 222. [2019-12-27 00:44:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:44:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-27 00:44:44,732 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-27 00:44:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:44,732 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-27 00:44:44,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-27 00:44:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:44,733 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:44,733 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:44,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:44,937 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 117 times [2019-12-27 00:44:44,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:44,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544346513] [2019-12-27 00:44:44,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:45,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544346513] [2019-12-27 00:44:45,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52309224] [2019-12-27 00:44:45,021 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:45,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 00:44:45,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:45,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:45,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:45,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:45,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630870103] [2019-12-27 00:44:45,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:45,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:45,285 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-27 00:44:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:46,033 INFO L93 Difference]: Finished difference Result 320 states and 748 transitions. [2019-12-27 00:44:46,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:44:46,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:46,035 INFO L225 Difference]: With dead ends: 320 [2019-12-27 00:44:46,035 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 00:44:46,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-27 00:44:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 00:44:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2019-12-27 00:44:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-27 00:44:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 553 transitions. [2019-12-27 00:44:46,039 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 553 transitions. Word has length 14 [2019-12-27 00:44:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:46,039 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 553 transitions. [2019-12-27 00:44:46,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 553 transitions. [2019-12-27 00:44:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:46,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:46,040 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:46,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:46,241 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 118 times [2019-12-27 00:44:46,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:46,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010428204] [2019-12-27 00:44:46,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:46,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010428204] [2019-12-27 00:44:46,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952596451] [2019-12-27 00:44:46,328 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:46,369 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:44:46,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:46,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:46,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:46,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:46,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:46,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132291985] [2019-12-27 00:44:46,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:46,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:46,573 INFO L87 Difference]: Start difference. First operand 219 states and 553 transitions. Second operand 18 states. [2019-12-27 00:44:46,878 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 00:44:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:52,598 INFO L93 Difference]: Finished difference Result 290 states and 689 transitions. [2019-12-27 00:44:52,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:44:52,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:52,600 INFO L225 Difference]: With dead ends: 290 [2019-12-27 00:44:52,600 INFO L226 Difference]: Without dead ends: 289 [2019-12-27 00:44:52,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=289, Invalid=579, Unknown=2, NotChecked=0, Total=870 [2019-12-27 00:44:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-27 00:44:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 216. [2019-12-27 00:44:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:44:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:44:52,605 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:44:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:52,605 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:44:52,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:44:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:52,605 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:52,605 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:52,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:52,806 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 119 times [2019-12-27 00:44:52,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:52,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49115394] [2019-12-27 00:44:52,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:52,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49115394] [2019-12-27 00:44:52,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706408365] [2019-12-27 00:44:52,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:52,938 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 00:44:52,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:52,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:52,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:53,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:53,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:53,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641486567] [2019-12-27 00:44:53,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:53,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:53,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:53,058 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:44:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:53,499 INFO L93 Difference]: Finished difference Result 268 states and 640 transitions. [2019-12-27 00:44:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:44:53,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:53,500 INFO L225 Difference]: With dead ends: 268 [2019-12-27 00:44:53,500 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 00:44:53,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-27 00:44:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 00:44:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2019-12-27 00:44:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:44:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:44:53,505 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:44:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:53,505 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:44:53,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:44:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:53,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:53,506 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:53,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:53,709 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 120 times [2019-12-27 00:44:53,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:53,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141072271] [2019-12-27 00:44:53,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:53,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141072271] [2019-12-27 00:44:53,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822148049] [2019-12-27 00:44:53,811 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:53,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:44:53,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:53,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:53,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:54,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:54,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:54,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503984512] [2019-12-27 00:44:54,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:54,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=217, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:44:54,398 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:44:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:55,863 INFO L93 Difference]: Finished difference Result 284 states and 671 transitions. [2019-12-27 00:44:55,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:44:55,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:55,866 INFO L225 Difference]: With dead ends: 284 [2019-12-27 00:44:55,866 INFO L226 Difference]: Without dead ends: 283 [2019-12-27 00:44:55,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=550, Unknown=1, NotChecked=0, Total=812 [2019-12-27 00:44:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2019-12-27 00:44:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 216. [2019-12-27 00:44:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:44:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:44:55,871 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:44:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:55,871 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:44:55,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:44:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:55,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:55,872 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:56,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:56,075 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 121 times [2019-12-27 00:44:56,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:56,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970641156] [2019-12-27 00:44:56,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:56,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970641156] [2019-12-27 00:44:56,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371422675] [2019-12-27 00:44:56,176 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:56,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:56,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:56,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:56,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:56,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176985888] [2019-12-27 00:44:56,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:56,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:56,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:56,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:44:56,349 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:44:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:44:56,765 INFO L93 Difference]: Finished difference Result 282 states and 668 transitions. [2019-12-27 00:44:56,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:44:56,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:44:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:44:56,766 INFO L225 Difference]: With dead ends: 282 [2019-12-27 00:44:56,767 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 00:44:56,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-27 00:44:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 00:44:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2019-12-27 00:44:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:44:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:44:56,771 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:44:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:44:56,771 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:44:56,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:44:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:44:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:44:56,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:44:56,772 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:44:56,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:56,972 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:44:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:44:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 122 times [2019-12-27 00:44:56,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:44:56,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550514579] [2019-12-27 00:44:56,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:44:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:44:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:57,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550514579] [2019-12-27 00:44:57,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056569862] [2019-12-27 00:44:57,078 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:44:57,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:44:57,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:44:57,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:44:57,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:44:57,801 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_414 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_414) 2)) (<= c_~j~0 (+ v_~i~0_414 c_~i~0 2)) (<= (div (+ (* v_~i~0_414 (- 1)) 1) (- 3)) 2))) is different from true [2019-12-27 00:44:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:44:57,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:44:57,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:44:57,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493661296] [2019-12-27 00:44:57,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:44:57,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:44:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:44:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=188, Unknown=1, NotChecked=30, Total=306 [2019-12-27 00:44:57,803 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:44:58,483 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2019-12-27 00:45:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:00,676 INFO L93 Difference]: Finished difference Result 324 states and 754 transitions. [2019-12-27 00:45:00,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:45:00,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:00,677 INFO L225 Difference]: With dead ends: 324 [2019-12-27 00:45:00,678 INFO L226 Difference]: Without dead ends: 323 [2019-12-27 00:45:00,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=276, Invalid=538, Unknown=2, NotChecked=54, Total=870 [2019-12-27 00:45:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-12-27 00:45:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 216. [2019-12-27 00:45:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:45:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:45:00,683 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:45:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:00,683 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:45:00,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:45:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:00,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:00,683 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:00,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:00,884 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 123 times [2019-12-27 00:45:00,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:00,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890851401] [2019-12-27 00:45:00,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:00,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890851401] [2019-12-27 00:45:00,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855236735] [2019-12-27 00:45:00,969 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:01,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:45:01,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:01,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:01,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:01,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:01,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:01,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324024003] [2019-12-27 00:45:01,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:01,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:01,148 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:45:01,734 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2019-12-27 00:45:02,443 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-12-27 00:45:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:03,184 INFO L93 Difference]: Finished difference Result 314 states and 732 transitions. [2019-12-27 00:45:03,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:45:03,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:03,186 INFO L225 Difference]: With dead ends: 314 [2019-12-27 00:45:03,186 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 00:45:03,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=333, Invalid=658, Unknown=1, NotChecked=0, Total=992 [2019-12-27 00:45:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 00:45:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 214. [2019-12-27 00:45:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 00:45:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 00:45:03,196 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 00:45:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:03,196 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 00:45:03,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 00:45:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:03,196 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:03,197 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:03,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:03,400 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 124 times [2019-12-27 00:45:03,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:03,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222612232] [2019-12-27 00:45:03,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:03,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222612232] [2019-12-27 00:45:03,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508339922] [2019-12-27 00:45:03,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:03,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:45:03,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:03,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:03,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:03,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:03,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:03,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663164421] [2019-12-27 00:45:03,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:03,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:03,682 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-27 00:45:04,516 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2019-12-27 00:45:05,806 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-27 00:45:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:07,286 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-27 00:45:07,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 00:45:07,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:07,288 INFO L225 Difference]: With dead ends: 288 [2019-12-27 00:45:07,288 INFO L226 Difference]: Without dead ends: 287 [2019-12-27 00:45:07,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=398, Invalid=860, Unknown=2, NotChecked=0, Total=1260 [2019-12-27 00:45:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-27 00:45:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 217. [2019-12-27 00:45:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 00:45:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 00:45:07,292 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 00:45:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:07,292 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 00:45:07,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 00:45:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:07,293 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:07,293 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:07,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:07,494 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:07,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 125 times [2019-12-27 00:45:07,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:07,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022564219] [2019-12-27 00:45:07,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:07,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022564219] [2019-12-27 00:45:07,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11732087] [2019-12-27 00:45:07,592 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:07,637 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 00:45:07,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:07,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:07,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:08,927 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_426 Int)) (and (<= c_~i~0 (+ v_~i~0_426 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_426 2)) (<= (div (+ (* v_~i~0_426 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-27 00:45:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-27 00:45:17,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:17,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548081612] [2019-12-27 00:45:17,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:17,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=185, Unknown=2, NotChecked=30, Total=306 [2019-12-27 00:45:17,440 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 18 states. [2019-12-27 00:45:20,561 WARN L192 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 00:45:20,889 WARN L192 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2019-12-27 00:45:23,133 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 00:45:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:26,072 INFO L93 Difference]: Finished difference Result 335 states and 781 transitions. [2019-12-27 00:45:26,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 00:45:26,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:26,075 INFO L225 Difference]: With dead ends: 335 [2019-12-27 00:45:26,075 INFO L226 Difference]: Without dead ends: 333 [2019-12-27 00:45:26,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=363, Invalid=760, Unknown=3, NotChecked=64, Total=1190 [2019-12-27 00:45:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-27 00:45:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 216. [2019-12-27 00:45:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 00:45:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 00:45:26,080 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 00:45:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:26,081 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 00:45:26,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 00:45:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:26,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:26,081 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:26,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:26,285 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 126 times [2019-12-27 00:45:26,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:26,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811742413] [2019-12-27 00:45:26,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:26,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811742413] [2019-12-27 00:45:26,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579629117] [2019-12-27 00:45:26,372 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:26,416 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:45:26,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:26,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:26,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:26,912 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_430 Int)) (and (<= c_~j~0 (+ v_~i~0_430 c_~i~0 2)) (<= (div (+ (* v_~i~0_430 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 2 v_~i~0_430) 2)))) is different from true [2019-12-27 00:45:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 00:45:26,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:26,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:26,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907769366] [2019-12-27 00:45:26,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:26,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=187, Unknown=1, NotChecked=30, Total=306 [2019-12-27 00:45:26,944 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-27 00:45:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:30,886 INFO L93 Difference]: Finished difference Result 356 states and 833 transitions. [2019-12-27 00:45:30,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:45:30,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:30,888 INFO L225 Difference]: With dead ends: 356 [2019-12-27 00:45:30,888 INFO L226 Difference]: Without dead ends: 354 [2019-12-27 00:45:30,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=326, Invalid=605, Unknown=3, NotChecked=58, Total=992 [2019-12-27 00:45:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-27 00:45:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 223. [2019-12-27 00:45:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-27 00:45:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-27 00:45:30,893 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-27 00:45:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:30,893 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-27 00:45:30,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-27 00:45:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:30,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:30,894 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:31,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:31,095 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 127 times [2019-12-27 00:45:31,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:31,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356589598] [2019-12-27 00:45:31,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:31,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356589598] [2019-12-27 00:45:31,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689479228] [2019-12-27 00:45:31,188 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:31,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:31,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:31,776 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 00:45:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:32,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:32,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:32,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660433943] [2019-12-27 00:45:32,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:32,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:32,073 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-27 00:45:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:34,294 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-27 00:45:34,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:45:34,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:34,295 INFO L225 Difference]: With dead ends: 341 [2019-12-27 00:45:34,295 INFO L226 Difference]: Without dead ends: 339 [2019-12-27 00:45:34,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 00:45:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2019-12-27 00:45:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 221. [2019-12-27 00:45:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 00:45:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-27 00:45:34,299 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-27 00:45:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:34,300 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-27 00:45:34,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-27 00:45:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:34,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:34,300 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:34,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:34,501 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 128 times [2019-12-27 00:45:34,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:34,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114577520] [2019-12-27 00:45:34,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:34,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114577520] [2019-12-27 00:45:34,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101221768] [2019-12-27 00:45:34,598 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:34,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:45:34,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:34,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:34,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:34,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:34,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:34,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741045641] [2019-12-27 00:45:34,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:34,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:34,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:34,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:34,886 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-27 00:45:37,010 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 00:45:38,547 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 00:45:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:39,820 INFO L93 Difference]: Finished difference Result 338 states and 792 transitions. [2019-12-27 00:45:39,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:45:39,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:39,822 INFO L225 Difference]: With dead ends: 338 [2019-12-27 00:45:39,822 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 00:45:39,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=369, Invalid=752, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 00:45:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 00:45:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 223. [2019-12-27 00:45:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-27 00:45:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-27 00:45:39,835 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-27 00:45:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:39,835 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-27 00:45:39,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-27 00:45:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:39,836 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:39,836 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:40,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:40,039 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 129 times [2019-12-27 00:45:40,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:40,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169325358] [2019-12-27 00:45:40,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:40,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169325358] [2019-12-27 00:45:40,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064907089] [2019-12-27 00:45:40,128 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:40,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 00:45:40,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:40,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 00:45:40,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:40,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:40,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:40,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712577645] [2019-12-27 00:45:40,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:40,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:40,325 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-27 00:45:40,878 WARN L192 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2019-12-27 00:45:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:41,598 INFO L93 Difference]: Finished difference Result 343 states and 813 transitions. [2019-12-27 00:45:41,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 00:45:41,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:41,599 INFO L225 Difference]: With dead ends: 343 [2019-12-27 00:45:41,599 INFO L226 Difference]: Without dead ends: 341 [2019-12-27 00:45:41,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 00:45:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-12-27 00:45:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 221. [2019-12-27 00:45:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 00:45:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-27 00:45:41,604 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-27 00:45:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:41,604 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-27 00:45:41,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-27 00:45:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:41,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:41,604 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:41,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:41,805 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 130 times [2019-12-27 00:45:41,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:41,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610281267] [2019-12-27 00:45:41,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:41,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610281267] [2019-12-27 00:45:41,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259329143] [2019-12-27 00:45:41,893 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:41,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:45:41,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:41,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:41,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:42,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:42,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:42,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296408364] [2019-12-27 00:45:42,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:42,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:42,036 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-27 00:45:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:42,427 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2019-12-27 00:45:42,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:45:42,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:42,429 INFO L225 Difference]: With dead ends: 276 [2019-12-27 00:45:42,429 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 00:45:42,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 00:45:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 00:45:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 222. [2019-12-27 00:45:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:45:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-27 00:45:42,434 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-27 00:45:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:42,434 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-27 00:45:42,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-27 00:45:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:42,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:42,435 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:42,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:42,635 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 131 times [2019-12-27 00:45:42,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:42,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207894062] [2019-12-27 00:45:42,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:42,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207894062] [2019-12-27 00:45:42,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125675720] [2019-12-27 00:45:42,730 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:42,775 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 00:45:42,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:42,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:42,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:42,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:42,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:42,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965838720] [2019-12-27 00:45:42,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:42,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:42,883 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-27 00:45:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:43,347 INFO L93 Difference]: Finished difference Result 326 states and 768 transitions. [2019-12-27 00:45:43,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:45:43,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:43,349 INFO L225 Difference]: With dead ends: 326 [2019-12-27 00:45:43,349 INFO L226 Difference]: Without dead ends: 325 [2019-12-27 00:45:43,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 00:45:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-27 00:45:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 221. [2019-12-27 00:45:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 00:45:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-27 00:45:43,354 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-27 00:45:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:43,354 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-27 00:45:43,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-27 00:45:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:43,354 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:43,354 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:43,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:43,555 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:43,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 132 times [2019-12-27 00:45:43,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:43,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792985050] [2019-12-27 00:45:43,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:43,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792985050] [2019-12-27 00:45:43,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099430848] [2019-12-27 00:45:43,657 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:43,702 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 00:45:43,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:43,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:43,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:43,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:43,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:43,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383595141] [2019-12-27 00:45:43,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:43,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:43,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:43,822 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-27 00:45:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:44,346 INFO L93 Difference]: Finished difference Result 335 states and 798 transitions. [2019-12-27 00:45:44,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:45:44,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:44,347 INFO L225 Difference]: With dead ends: 335 [2019-12-27 00:45:44,348 INFO L226 Difference]: Without dead ends: 333 [2019-12-27 00:45:44,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 00:45:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-27 00:45:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 222. [2019-12-27 00:45:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:45:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-27 00:45:44,352 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-27 00:45:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:44,352 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-27 00:45:44,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-27 00:45:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:44,352 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:44,352 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:44,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:44,553 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 133 times [2019-12-27 00:45:44,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:44,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544818086] [2019-12-27 00:45:44,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:44,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544818086] [2019-12-27 00:45:44,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154177496] [2019-12-27 00:45:44,644 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:44,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:44,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:44,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:44,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:44,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456848425] [2019-12-27 00:45:44,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:44,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:44,787 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-27 00:45:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:45,247 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-27 00:45:45,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:45:45,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:45,248 INFO L225 Difference]: With dead ends: 341 [2019-12-27 00:45:45,249 INFO L226 Difference]: Without dead ends: 340 [2019-12-27 00:45:45,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:45:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-12-27 00:45:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 222. [2019-12-27 00:45:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:45:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-27 00:45:45,253 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-27 00:45:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:45,253 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-27 00:45:45,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-27 00:45:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:45,253 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:45,253 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:45,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:45,454 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 134 times [2019-12-27 00:45:45,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:45,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016041359] [2019-12-27 00:45:45,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:45,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016041359] [2019-12-27 00:45:45,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765215350] [2019-12-27 00:45:45,562 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:45,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:45:45,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:45,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:45,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:45,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:45,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:45,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957218858] [2019-12-27 00:45:45,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:45,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:45,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:45,818 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-27 00:45:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:46,315 INFO L93 Difference]: Finished difference Result 339 states and 804 transitions. [2019-12-27 00:45:46,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 00:45:46,316 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:46,316 INFO L225 Difference]: With dead ends: 339 [2019-12-27 00:45:46,317 INFO L226 Difference]: Without dead ends: 338 [2019-12-27 00:45:46,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:45:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-27 00:45:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 222. [2019-12-27 00:45:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 00:45:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-27 00:45:46,321 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-27 00:45:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:46,322 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-27 00:45:46,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-27 00:45:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:46,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:46,322 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:46,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:46,526 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 135 times [2019-12-27 00:45:46,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:46,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160339793] [2019-12-27 00:45:46,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:46,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160339793] [2019-12-27 00:45:46,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429280349] [2019-12-27 00:45:46,613 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:46,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 00:45:46,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:46,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:46,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:46,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:46,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:46,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458022801] [2019-12-27 00:45:46,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:46,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:46,776 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-27 00:45:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:47,243 INFO L93 Difference]: Finished difference Result 334 states and 793 transitions. [2019-12-27 00:45:47,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 00:45:47,243 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:47,244 INFO L225 Difference]: With dead ends: 334 [2019-12-27 00:45:47,244 INFO L226 Difference]: Without dead ends: 332 [2019-12-27 00:45:47,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:45:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-27 00:45:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 220. [2019-12-27 00:45:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-27 00:45:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 559 transitions. [2019-12-27 00:45:47,249 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 559 transitions. Word has length 14 [2019-12-27 00:45:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:47,250 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 559 transitions. [2019-12-27 00:45:47,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 559 transitions. [2019-12-27 00:45:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:47,250 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:47,250 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:47,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:47,454 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 136 times [2019-12-27 00:45:47,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:47,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278411704] [2019-12-27 00:45:47,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:47,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278411704] [2019-12-27 00:45:47,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955749556] [2019-12-27 00:45:47,543 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:47,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:45:47,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:47,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:47,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:48,952 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 00:45:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:48,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:48,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:48,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334043819] [2019-12-27 00:45:48,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:48,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:45:48,954 INFO L87 Difference]: Start difference. First operand 220 states and 559 transitions. Second operand 18 states. [2019-12-27 00:45:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:50,584 INFO L93 Difference]: Finished difference Result 329 states and 779 transitions. [2019-12-27 00:45:50,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 00:45:50,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:50,585 INFO L225 Difference]: With dead ends: 329 [2019-12-27 00:45:50,586 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 00:45:50,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=359, Invalid=696, Unknown=1, NotChecked=0, Total=1056 [2019-12-27 00:45:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 00:45:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 218. [2019-12-27 00:45:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 00:45:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 00:45:50,590 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 00:45:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:50,590 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 00:45:50,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 00:45:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:50,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:50,591 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:50,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:50,791 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 137 times [2019-12-27 00:45:50,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:50,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460183701] [2019-12-27 00:45:50,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:50,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460183701] [2019-12-27 00:45:50,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534810903] [2019-12-27 00:45:50,877 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:50,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 00:45:50,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:50,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:50,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:51,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:51,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:51,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404947373] [2019-12-27 00:45:51,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:51,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:51,043 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 18 states. [2019-12-27 00:45:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:51,407 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-27 00:45:51,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 00:45:51,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:51,408 INFO L225 Difference]: With dead ends: 237 [2019-12-27 00:45:51,408 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 00:45:51,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:45:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 00:45:51,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-27 00:45:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 00:45:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-27 00:45:51,415 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-27 00:45:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:51,415 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-27 00:45:51,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-27 00:45:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:51,416 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:51,416 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:51,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:51,620 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 138 times [2019-12-27 00:45:51,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:51,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56446527] [2019-12-27 00:45:51,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:51,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56446527] [2019-12-27 00:45:51,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019197700] [2019-12-27 00:45:51,713 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:51,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:45:51,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:51,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:51,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:51,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:51,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:51,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474790707] [2019-12-27 00:45:51,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:51,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:51,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:51,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:51,869 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 18 states. [2019-12-27 00:45:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:52,266 INFO L93 Difference]: Finished difference Result 243 states and 585 transitions. [2019-12-27 00:45:52,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 00:45:52,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:52,268 INFO L225 Difference]: With dead ends: 243 [2019-12-27 00:45:52,268 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 00:45:52,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-27 00:45:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 00:45:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 210. [2019-12-27 00:45:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 00:45:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 00:45:52,272 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 00:45:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:52,272 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 00:45:52,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 00:45:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:52,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:52,273 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:52,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:52,475 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 139 times [2019-12-27 00:45:52,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:52,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899759796] [2019-12-27 00:45:52,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:52,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899759796] [2019-12-27 00:45:52,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942341888] [2019-12-27 00:45:52,570 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:52,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:52,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:53,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:53,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:53,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580518820] [2019-12-27 00:45:53,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:53,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=224, Unknown=2, NotChecked=0, Total=306 [2019-12-27 00:45:53,963 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-27 00:45:54,426 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-27 00:45:56,459 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 00:45:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:56,530 INFO L93 Difference]: Finished difference Result 267 states and 633 transitions. [2019-12-27 00:45:56,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 00:45:56,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:56,531 INFO L225 Difference]: With dead ends: 267 [2019-12-27 00:45:56,531 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 00:45:56,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=291, Invalid=637, Unknown=2, NotChecked=0, Total=930 [2019-12-27 00:45:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 00:45:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 211. [2019-12-27 00:45:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 00:45:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 00:45:56,535 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 00:45:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:56,535 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 00:45:56,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 00:45:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:56,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:56,536 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:56,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:56,739 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 140 times [2019-12-27 00:45:56,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:56,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11588141] [2019-12-27 00:45:56,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:56,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11588141] [2019-12-27 00:45:56,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29313598] [2019-12-27 00:45:56,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:56,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 00:45:56,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:56,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:56,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:57,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:57,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:57,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580170350] [2019-12-27 00:45:57,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:57,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:45:57,050 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 18 states. [2019-12-27 00:45:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:45:57,510 INFO L93 Difference]: Finished difference Result 264 states and 627 transitions. [2019-12-27 00:45:57,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:45:57,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:45:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:45:57,512 INFO L225 Difference]: With dead ends: 264 [2019-12-27 00:45:57,512 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 00:45:57,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:45:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 00:45:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2019-12-27 00:45:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 00:45:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 00:45:57,517 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 00:45:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:45:57,517 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 00:45:57,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:45:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 00:45:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:45:57,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:45:57,517 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:45:57,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:57,718 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:45:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:45:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 141 times [2019-12-27 00:45:57,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:45:57,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546224511] [2019-12-27 00:45:57,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:45:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:45:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:57,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546224511] [2019-12-27 00:45:57,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995401498] [2019-12-27 00:45:57,806 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:45:57,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 00:45:57,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:45:57,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:45:57,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:45:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:45:59,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:45:59,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:45:59,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799673728] [2019-12-27 00:45:59,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:45:59,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:45:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:45:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-27 00:45:59,352 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-27 00:46:00,832 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 00:46:01,356 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 00:46:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:46:01,405 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2019-12-27 00:46:01,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 00:46:01,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:46:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:46:01,406 INFO L225 Difference]: With dead ends: 269 [2019-12-27 00:46:01,406 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 00:46:01,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=318, Invalid=671, Unknown=3, NotChecked=0, Total=992 [2019-12-27 00:46:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 00:46:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2019-12-27 00:46:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 00:46:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 00:46:01,411 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 00:46:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:46:01,411 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 00:46:01,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:46:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 00:46:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:46:01,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:46:01,412 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:46:01,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:01,612 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:46:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:46:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 142 times [2019-12-27 00:46:01,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:46:01,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844828597] [2019-12-27 00:46:01,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:46:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:46:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:01,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844828597] [2019-12-27 00:46:01,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691628208] [2019-12-27 00:46:01,705 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:01,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 00:46:01,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:46:01,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:46:01,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:46:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:03,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:46:03,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:46:03,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424620927] [2019-12-27 00:46:03,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:46:03,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:46:03,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:46:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-27 00:46:03,802 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-27 00:46:04,113 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-27 00:46:04,534 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 00:46:04,751 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 00:46:05,228 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 00:46:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:46:05,346 INFO L93 Difference]: Finished difference Result 302 states and 698 transitions. [2019-12-27 00:46:05,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:46:05,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:46:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:46:05,348 INFO L225 Difference]: With dead ends: 302 [2019-12-27 00:46:05,348 INFO L226 Difference]: Without dead ends: 300 [2019-12-27 00:46:05,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=313, Invalid=676, Unknown=3, NotChecked=0, Total=992 [2019-12-27 00:46:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-27 00:46:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2019-12-27 00:46:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 00:46:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 00:46:05,352 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 00:46:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:46:05,352 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 00:46:05,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:46:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 00:46:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:46:05,353 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:46:05,353 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:46:05,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:05,554 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:46:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:46:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 143 times [2019-12-27 00:46:05,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:46:05,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644666176] [2019-12-27 00:46:05,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:46:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:46:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:05,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644666176] [2019-12-27 00:46:05,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069205143] [2019-12-27 00:46:05,656 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:05,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 00:46:05,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:46:05,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:46:05,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:46:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:05,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:46:05,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:46:05,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338646473] [2019-12-27 00:46:05,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:46:05,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:46:05,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:46:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 00:46:05,834 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-27 00:46:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:46:06,411 INFO L93 Difference]: Finished difference Result 287 states and 672 transitions. [2019-12-27 00:46:06,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 00:46:06,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:46:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:46:06,413 INFO L225 Difference]: With dead ends: 287 [2019-12-27 00:46:06,413 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 00:46:06,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-27 00:46:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 00:46:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 210. [2019-12-27 00:46:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 00:46:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 00:46:06,417 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 00:46:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:46:06,417 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 00:46:06,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:46:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 00:46:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:46:06,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:46:06,418 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:46:06,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:06,619 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:46:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:46:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 144 times [2019-12-27 00:46:06,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:46:06,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947470358] [2019-12-27 00:46:06,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:46:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:46:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:06,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947470358] [2019-12-27 00:46:06,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342298195] [2019-12-27 00:46:06,798 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:06,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 00:46:06,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 00:46:06,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:46:06,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:46:07,058 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_504 Int)) (and (<= c_~i~0 (+ (* 2 c_~j~0) v_~i~0_504)) (<= (div (+ (* v_~i~0_504 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ v_~i~0_504 1)))) is different from true [2019-12-27 00:46:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2019-12-27 00:46:07,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:46:07,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:46:07,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073464072] [2019-12-27 00:46:07,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:46:07,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:46:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:46:07,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=196, Unknown=1, NotChecked=30, Total=306 [2019-12-27 00:46:07,128 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-27 00:46:08,495 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 00:46:09,083 WARN L192 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2019-12-27 00:46:10,116 WARN L192 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 00:46:13,762 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-27 00:46:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 00:46:13,773 INFO L93 Difference]: Finished difference Result 297 states and 676 transitions. [2019-12-27 00:46:13,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 00:46:13,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 00:46:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 00:46:13,774 INFO L225 Difference]: With dead ends: 297 [2019-12-27 00:46:13,774 INFO L226 Difference]: Without dead ends: 289 [2019-12-27 00:46:13,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=391, Invalid=867, Unknown=6, NotChecked=68, Total=1332 [2019-12-27 00:46:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-27 00:46:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 213. [2019-12-27 00:46:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 00:46:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-27 00:46:13,779 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-27 00:46:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 00:46:13,779 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-27 00:46:13,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 00:46:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-27 00:46:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 00:46:13,780 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 00:46:13,780 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 00:46:13,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:13,981 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 00:46:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 00:46:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 145 times [2019-12-27 00:46:13,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 00:46:13,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084116819] [2019-12-27 00:46:13,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 00:46:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:46:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:14,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084116819] [2019-12-27 00:46:14,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361584263] [2019-12-27 00:46:14,130 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 00:46:14,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 00:46:14,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 00:46:15,622 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 00:46:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 00:46:21,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 00:46:21,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 00:46:21,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191653614] [2019-12-27 00:46:21,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 00:46:21,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 00:46:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 00:46:21,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 00:46:21,833 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 18 states. [2019-12-27 00:46:23,949 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 30 [2019-12-27 00:46:26,141 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 00:46:26,625 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 00:46:26,949 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 Received shutdown request... [2019-12-27 00:46:28,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 00:46:29,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 00:46:29,192 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 00:46:29,197 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 00:46:29,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 12:46:29 BasicIcfg [2019-12-27 00:46:29,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 00:46:29,199 INFO L168 Benchmark]: Toolchain (without parser) took 283421.28 ms. Allocated memory was 144.7 MB in the beginning and 179.3 MB in the end (delta: 34.6 MB). Free memory was 101.5 MB in the beginning and 113.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,199 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.37 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.3 MB in the beginning and 159.9 MB in the end (delta: -58.7 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,200 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 202.4 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,200 INFO L168 Benchmark]: Boogie Preprocessor took 28.68 ms. Allocated memory is still 202.4 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,200 INFO L168 Benchmark]: RCFGBuilder took 431.24 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 136.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-27 00:46:29,200 INFO L168 Benchmark]: TraceAbstraction took 282186.97 ms. Allocated memory was 202.4 MB in the beginning and 179.3 MB in the end (delta: -23.1 MB). Free memory was 136.0 MB in the beginning and 113.6 MB in the end (delta: 22.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 00:46:29,202 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 722.37 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.3 MB in the beginning and 159.9 MB in the end (delta: -58.7 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 202.4 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.68 ms. Allocated memory is still 202.4 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.24 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 136.0 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 282186.97 ms. Allocated memory was 202.4 MB in the beginning and 179.3 MB in the end (delta: -23.1 MB). Free memory was 136.0 MB in the beginning and 113.6 MB in the end (delta: 22.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (213states) and FLOYD_HOARE automaton (currently 13 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 27 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 282.0s, OverallIterations: 160, TraceHistogramMax: 7, AutomataDifference: 152.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1529 SDtfs, 21313 SDslu, 12721 SDs, 0 SdLazy, 7041 SolverSat, 3883 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 39.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4327 GetRequests, 767 SyntacticMatches, 14 SemanticMatches, 3545 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 20305 ImplicationChecksByTransitivity, 191.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 159 MinimizatonAttempts, 8089 StatesRemovedByMinimization, 156 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 86.0s InterpolantComputationTime, 3973 NumberOfCodeBlocks, 3973 NumberOfCodeBlocksAsserted, 519 NumberOfCheckSat, 3658 ConstructedInterpolants, 146 QuantifiedInterpolants, 422480 SizeOfPredicates, 6 NumberOfNonLiveVariables, 14323 ConjunctsInSsa, 1691 ConjunctsInUnsatCore, 315 InterpolantComputations, 7 PerfectInterpolantSequences, 42/2302 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown