/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:45:18,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:45:18,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:45:19,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:45:19,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:45:19,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:45:19,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:45:19,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:45:19,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:45:19,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:45:19,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:45:19,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:45:19,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:45:19,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:45:19,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:45:19,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:45:19,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:45:19,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:45:19,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:45:19,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:45:19,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:45:19,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:45:19,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:45:19,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:45:19,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:45:19,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:45:19,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:45:19,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:45:19,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:45:19,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:45:19,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:45:19,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:45:19,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:45:19,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:45:19,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:45:19,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:45:19,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:45:19,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:45:19,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:45:19,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:45:19,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:45:19,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-26 20:45:19,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:45:19,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:45:19,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:45:19,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:45:19,117 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:45:19,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:45:19,117 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:45:19,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:45:19,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:45:19,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:45:19,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:45:19,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:45:19,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:45:19,121 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:45:19,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:45:19,121 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:45:19,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:45:19,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:45:19,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:45:19,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:45:19,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:45:19,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:45:19,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:45:19,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:45:19,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:45:19,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:45:19,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:45:19,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:45:19,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:45:19,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:45:19,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:45:19,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:45:19,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:45:19,440 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:45:19,440 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:45:19,442 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-26 20:45:19,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec8a1b42/52bbbe8370704eaea5e86e56150f6ee7/FLAG57ff12ce5 [2019-12-26 20:45:20,042 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:45:20,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-26 20:45:20,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec8a1b42/52bbbe8370704eaea5e86e56150f6ee7/FLAG57ff12ce5 [2019-12-26 20:45:20,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec8a1b42/52bbbe8370704eaea5e86e56150f6ee7 [2019-12-26 20:45:20,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:45:20,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:45:20,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:20,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:45:20,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:45:20,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2391b325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20, skipping insertion in model container [2019-12-26 20:45:20,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:45:20,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:45:20,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:20,950 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:45:21,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:21,105 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:45:21,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21 WrapperNode [2019-12-26 20:45:21,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:21,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:21,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:45:21,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:45:21,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:21,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:45:21,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:45:21,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:45:21,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:45:21,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:45:21,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:45:21,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:45:21,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (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 [2019-12-26 20:45:21,246 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:45:21,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:45:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:45:21,247 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:45:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:45:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:45:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:45:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:45:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:45:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:45:21,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:45:21,249 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:45:21,624 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:45:21,624 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:45:21,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21 BoogieIcfgContainer [2019-12-26 20:45:21,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:45:21,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:45:21,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:45:21,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:45:21,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:45:20" (1/3) ... [2019-12-26 20:45:21,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (2/3) ... [2019-12-26 20:45:21,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21" (3/3) ... [2019-12-26 20:45:21,639 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-26 20:45:21,650 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:45:21,650 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:45:21,658 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:45:21,659 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:45:21,686 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,686 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,687 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,687 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,687 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,688 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,688 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,688 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,688 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,689 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,689 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,689 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,689 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,690 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,690 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,690 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,691 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,691 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,691 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,691 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,692 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,692 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,692 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,692 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,693 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,693 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,693 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,693 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,694 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,694 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,698 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,706 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,706 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,722 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:45:21,738 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:45:21,739 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:45:21,739 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:45:21,739 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:45:21,739 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:45:21,739 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:45:21,739 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:45:21,739 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:45:21,750 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-26 20:45:21,752 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,793 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,793 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,801 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. [2019-12-26 20:45:21,805 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,825 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,825 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,827 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. [2019-12-26 20:45:21,830 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-26 20:45:21,832 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:45:23,043 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-26 20:45:23,156 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-26 20:45:23,157 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-26 20:45:23,161 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:45:23,170 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:45:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:45:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:45:23,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,177 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:45:23,178 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-26 20:45:23,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119118188] [2019-12-26 20:45:23,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119118188] [2019-12-26 20:45:23,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:45:23,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386590976] [2019-12-26 20:45:23,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:45:23,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:45:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:23,491 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:45:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,535 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-26 20:45:23,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:45:23,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:45:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,572 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:23,572 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:45:23,574 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 [2019-12-26 20:45:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:45:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:45:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:45:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-26 20:45:23,625 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-26 20:45:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,625 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-26 20:45:23,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:45:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-26 20:45:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,631 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,639 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-26 20:45:23,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039875407] [2019-12-26 20:45:23,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039875407] [2019-12-26 20:45:23,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805455233] [2019-12-26 20:45:23,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,776 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-26 20:45:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,796 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-26 20:45:23,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,798 INFO L225 Difference]: With dead ends: 42 [2019-12-26 20:45:23,798 INFO L226 Difference]: Without dead ends: 41 [2019-12-26 20:45:23,799 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 [2019-12-26 20:45:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-26 20:45:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-26 20:45:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-26 20:45:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-26 20:45:23,807 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-26 20:45:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,807 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-26 20:45:23,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-26 20:45:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,808 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,808 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,809 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-26 20:45:23,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962175162] [2019-12-26 20:45:23,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962175162] [2019-12-26 20:45:23,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775958848] [2019-12-26 20:45:23,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,876 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-26 20:45:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,890 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-26 20:45:23,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,892 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:45:23,892 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:45:23,892 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 [2019-12-26 20:45:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:45:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-26 20:45:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-26 20:45:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-26 20:45:23,900 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-26 20:45:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,900 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-26 20:45:23,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-26 20:45:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:23,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,902 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,902 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-26 20:45:23,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751087832] [2019-12-26 20:45:23,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751087832] [2019-12-26 20:45:23,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463344542] [2019-12-26 20:45:23,977 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 [2019-12-26 20:45:24,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:24,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:24,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928281641] [2019-12-26 20:45:24,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:24,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:24,108 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-26 20:45:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,144 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-26 20:45:24,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:24,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,145 INFO L225 Difference]: With dead ends: 56 [2019-12-26 20:45:24,145 INFO L226 Difference]: Without dead ends: 55 [2019-12-26 20:45:24,146 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 [2019-12-26 20:45:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-26 20:45:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-26 20:45:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:45:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-26 20:45:24,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-26 20:45:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,157 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-26 20:45:24,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-26 20:45:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:24,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,159 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:24,363 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-26 20:45:24,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754534186] [2019-12-26 20:45:24,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754534186] [2019-12-26 20:45:24,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186633734] [2019-12-26 20:45:24,452 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 [2019-12-26 20:45:24,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:24,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:24,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8574813] [2019-12-26 20:45:24,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:24,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:24,589 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-26 20:45:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,665 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-26 20:45:24,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:24,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,667 INFO L225 Difference]: With dead ends: 63 [2019-12-26 20:45:24,667 INFO L226 Difference]: Without dead ends: 62 [2019-12-26 20:45:24,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-26 20:45:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-26 20:45:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:45:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-26 20:45:24,676 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-26 20:45:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,676 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-26 20:45:24,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-26 20:45:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:24,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,678 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:24,882 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-26 20:45:24,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356713216] [2019-12-26 20:45:24,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356713216] [2019-12-26 20:45:24,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676598406] [2019-12-26 20:45:24,970 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 [2019-12-26 20:45:25,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:25,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:25,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:25,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:25,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:25,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978938188] [2019-12-26 20:45:25,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:25,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:25,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:25,106 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-26 20:45:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,146 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-26 20:45:25,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:25,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,151 INFO L225 Difference]: With dead ends: 66 [2019-12-26 20:45:25,151 INFO L226 Difference]: Without dead ends: 65 [2019-12-26 20:45:25,152 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 [2019-12-26 20:45:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-26 20:45:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-26 20:45:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:45:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-26 20:45:25,163 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-26 20:45:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,164 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-26 20:45:25,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-26 20:45:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,165 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:25,367 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-26 20:45:25,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544564180] [2019-12-26 20:45:25,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544564180] [2019-12-26 20:45:25,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012449949] [2019-12-26 20:45:25,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,427 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-26 20:45:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,449 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-26 20:45:25,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,453 INFO L225 Difference]: With dead ends: 68 [2019-12-26 20:45:25,453 INFO L226 Difference]: Without dead ends: 67 [2019-12-26 20:45:25,454 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 [2019-12-26 20:45:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-26 20:45:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-26 20:45:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-26 20:45:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-26 20:45:25,465 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-26 20:45:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,470 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-26 20:45:25,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-26 20:45:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,472 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,473 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-26 20:45:25,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730606297] [2019-12-26 20:45:25,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730606297] [2019-12-26 20:45:25,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751320977] [2019-12-26 20:45:25,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,549 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-26 20:45:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,577 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-26 20:45:25,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,579 INFO L225 Difference]: With dead ends: 69 [2019-12-26 20:45:25,579 INFO L226 Difference]: Without dead ends: 68 [2019-12-26 20:45:25,579 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 [2019-12-26 20:45:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-26 20:45:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-26 20:45:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-26 20:45:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-26 20:45:25,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-26 20:45:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,586 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-26 20:45:25,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-26 20:45:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,587 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,587 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,587 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-26 20:45:25,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634194531] [2019-12-26 20:45:25,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634194531] [2019-12-26 20:45:25,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667397211] [2019-12-26 20:45:25,663 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 [2019-12-26 20:45:25,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:25,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:25,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:25,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:25,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:25,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504954945] [2019-12-26 20:45:25,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:25,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:25,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:25,781 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-26 20:45:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,868 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-26 20:45:25,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:25,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,869 INFO L225 Difference]: With dead ends: 77 [2019-12-26 20:45:25,869 INFO L226 Difference]: Without dead ends: 76 [2019-12-26 20:45:25,870 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 [2019-12-26 20:45:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-26 20:45:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-26 20:45:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-26 20:45:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-26 20:45:25,876 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-26 20:45:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,876 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-26 20:45:25,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-26 20:45:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:25,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,877 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,091 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-26 20:45:26,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610378525] [2019-12-26 20:45:26,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610378525] [2019-12-26 20:45:26,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012271858] [2019-12-26 20:45:26,175 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 [2019-12-26 20:45:26,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:26,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:26,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462049853] [2019-12-26 20:45:26,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:26,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:26,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:26,380 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-26 20:45:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,424 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-26 20:45:26,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:26,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,426 INFO L225 Difference]: With dead ends: 80 [2019-12-26 20:45:26,426 INFO L226 Difference]: Without dead ends: 79 [2019-12-26 20:45:26,426 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 [2019-12-26 20:45:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-26 20:45:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-26 20:45:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:45:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-26 20:45:26,432 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-26 20:45:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,432 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-26 20:45:26,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-26 20:45:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,434 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,644 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-26 20:45:26,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378618689] [2019-12-26 20:45:26,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378618689] [2019-12-26 20:45:26,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470848099] [2019-12-26 20:45:26,699 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 [2019-12-26 20:45:26,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:26,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:26,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742573376] [2019-12-26 20:45:26,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:26,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:26,815 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-26 20:45:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,886 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-26 20:45:26,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:26,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,887 INFO L225 Difference]: With dead ends: 81 [2019-12-26 20:45:26,887 INFO L226 Difference]: Without dead ends: 80 [2019-12-26 20:45:26,888 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 [2019-12-26 20:45:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-26 20:45:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-26 20:45:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:45:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-26 20:45:26,893 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-26 20:45:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,893 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-26 20:45:26,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-26 20:45:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,894 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,098 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-26 20:45:27,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684646373] [2019-12-26 20:45:27,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684646373] [2019-12-26 20:45:27,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940363738] [2019-12-26 20:45:27,149 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 [2019-12-26 20:45:27,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:27,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:27,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:27,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421532607] [2019-12-26 20:45:27,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:27,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,292 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-26 20:45:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,362 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-26 20:45:27,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:27,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,363 INFO L225 Difference]: With dead ends: 85 [2019-12-26 20:45:27,363 INFO L226 Difference]: Without dead ends: 84 [2019-12-26 20:45:27,364 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 [2019-12-26 20:45:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-26 20:45:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-26 20:45:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-26 20:45:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-26 20:45:27,368 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-26 20:45:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,369 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-26 20:45:27,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-26 20:45:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,370 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,370 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,571 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-26 20:45:27,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659650553] [2019-12-26 20:45:27,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659650553] [2019-12-26 20:45:27,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191515293] [2019-12-26 20:45:27,631 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 [2019-12-26 20:45:27,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:27,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:27,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:27,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970266104] [2019-12-26 20:45:27,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:27,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,753 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-26 20:45:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,840 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-26 20:45:27,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:27,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,841 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:45:27,841 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:45:27,842 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 [2019-12-26 20:45:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:45:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-26 20:45:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-26 20:45:27,846 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-26 20:45:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,846 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-26 20:45:27,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-26 20:45:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,847 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,848 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,051 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-26 20:45:28,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479980113] [2019-12-26 20:45:28,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479980113] [2019-12-26 20:45:28,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108298844] [2019-12-26 20:45:28,102 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 [2019-12-26 20:45:28,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:28,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:28,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171667646] [2019-12-26 20:45:28,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,192 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-26 20:45:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,298 INFO L93 Difference]: Finished difference Result 89 states and 185 transitions. [2019-12-26 20:45:28,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:28,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,299 INFO L225 Difference]: With dead ends: 89 [2019-12-26 20:45:28,299 INFO L226 Difference]: Without dead ends: 88 [2019-12-26 20:45:28,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-26 20:45:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2019-12-26 20:45:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-26 20:45:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-26 20:45:28,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-26 20:45:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,304 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-26 20:45:28,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-26 20:45:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,305 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,506 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-26 20:45:28,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591325539] [2019-12-26 20:45:28,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591325539] [2019-12-26 20:45:28,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809848716] [2019-12-26 20:45:28,566 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 [2019-12-26 20:45:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690409703] [2019-12-26 20:45:28,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,654 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-26 20:45:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,772 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-26 20:45:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:28,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,773 INFO L225 Difference]: With dead ends: 88 [2019-12-26 20:45:28,773 INFO L226 Difference]: Without dead ends: 87 [2019-12-26 20:45:28,774 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 [2019-12-26 20:45:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-26 20:45:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-26 20:45:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-26 20:45:28,778 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-26 20:45:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,778 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-26 20:45:28,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-26 20:45:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,779 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,983 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-26 20:45:28,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893158677] [2019-12-26 20:45:28,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893158677] [2019-12-26 20:45:29,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927760316] [2019-12-26 20:45:29,047 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 [2019-12-26 20:45:29,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:29,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:29,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:29,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:29,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053240174] [2019-12-26 20:45:29,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:29,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:29,177 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-26 20:45:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,304 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-26 20:45:29,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:29,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,306 INFO L225 Difference]: With dead ends: 87 [2019-12-26 20:45:29,306 INFO L226 Difference]: Without dead ends: 86 [2019-12-26 20:45:29,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:45:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-26 20:45:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-26 20:45:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-26 20:45:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-26 20:45:29,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-26 20:45:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,313 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-26 20:45:29,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-26 20:45:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:29,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,314 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:29,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,520 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:29,520 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-26 20:45:29,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:29,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905314425] [2019-12-26 20:45:29,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905314425] [2019-12-26 20:45:29,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172401349] [2019-12-26 20:45:29,608 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 [2019-12-26 20:45:29,684 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:29,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:29,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:29,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:29,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116757026] [2019-12-26 20:45:29,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:29,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:29,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:29,769 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-26 20:45:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,870 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-26 20:45:29,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:29,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,872 INFO L225 Difference]: With dead ends: 92 [2019-12-26 20:45:29,872 INFO L226 Difference]: Without dead ends: 91 [2019-12-26 20:45:29,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-26 20:45:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-26 20:45:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:45:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-26 20:45:29,876 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-26 20:45:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,876 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-26 20:45:29,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-26 20:45:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:29,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,878 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,079 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-26 20:45:30,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96443719] [2019-12-26 20:45:30,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96443719] [2019-12-26 20:45:30,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687920068] [2019-12-26 20:45:30,150 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 [2019-12-26 20:45:30,200 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:30,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:30,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:30,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022169695] [2019-12-26 20:45:30,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:30,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:30,334 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-26 20:45:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,378 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-26 20:45:30,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:30,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,380 INFO L225 Difference]: With dead ends: 95 [2019-12-26 20:45:30,381 INFO L226 Difference]: Without dead ends: 94 [2019-12-26 20:45:30,381 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 [2019-12-26 20:45:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-26 20:45:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-26 20:45:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:30,387 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,387 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:30,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,388 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,589 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-26 20:45:30,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199057846] [2019-12-26 20:45:30,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199057846] [2019-12-26 20:45:30,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169725964] [2019-12-26 20:45:30,674 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 [2019-12-26 20:45:30,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:30,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:30,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:30,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891273802] [2019-12-26 20:45:30,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:30,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:30,794 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,901 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-26 20:45:30,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:30,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,902 INFO L225 Difference]: With dead ends: 98 [2019-12-26 20:45:30,903 INFO L226 Difference]: Without dead ends: 97 [2019-12-26 20:45:30,903 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 [2019-12-26 20:45:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-26 20:45:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-26 20:45:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:30,907 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,907 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:30,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,908 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,112 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-26 20:45:31,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33925920] [2019-12-26 20:45:31,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33925920] [2019-12-26 20:45:31,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836688488] [2019-12-26 20:45:31,173 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 [2019-12-26 20:45:31,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:31,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:31,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378616338] [2019-12-26 20:45:31,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:31,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:31,297 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,410 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-26 20:45:31,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:31,413 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,414 INFO L225 Difference]: With dead ends: 101 [2019-12-26 20:45:31,415 INFO L226 Difference]: Without dead ends: 100 [2019-12-26 20:45:31,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-26 20:45:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-26 20:45:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:31,420 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,420 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:31,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:31,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,421 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,624 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-26 20:45:31,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127656934] [2019-12-26 20:45:31,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127656934] [2019-12-26 20:45:31,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350041311] [2019-12-26 20:45:31,682 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 [2019-12-26 20:45:31,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:31,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:31,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265987256] [2019-12-26 20:45:31,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:31,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:31,863 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,044 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-26 20:45:32,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:32,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,046 INFO L225 Difference]: With dead ends: 105 [2019-12-26 20:45:32,046 INFO L226 Difference]: Without dead ends: 104 [2019-12-26 20:45:32,046 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 [2019-12-26 20:45:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-26 20:45:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-26 20:45:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:32,050 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,054 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:32,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,055 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,055 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,256 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-26 20:45:32,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422210830] [2019-12-26 20:45:32,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422210830] [2019-12-26 20:45:32,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430737141] [2019-12-26 20:45:32,312 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 [2019-12-26 20:45:32,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:32,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430289931] [2019-12-26 20:45:32,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,427 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,522 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-26 20:45:32,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:32,522 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,523 INFO L225 Difference]: With dead ends: 103 [2019-12-26 20:45:32,523 INFO L226 Difference]: Without dead ends: 102 [2019-12-26 20:45:32,524 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 [2019-12-26 20:45:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-26 20:45:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-26 20:45:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:45:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-26 20:45:32,529 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-26 20:45:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,529 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-26 20:45:32,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-26 20:45:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,530 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,733 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-26 20:45:32,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246087125] [2019-12-26 20:45:32,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246087125] [2019-12-26 20:45:32,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038413495] [2019-12-26 20:45:32,800 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 [2019-12-26 20:45:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062495037] [2019-12-26 20:45:32,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,944 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-26 20:45:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,105 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-26 20:45:33,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:33,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,106 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:33,106 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:33,107 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 [2019-12-26 20:45:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-26 20:45:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:33,110 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,111 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:33,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:33,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,111 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,319 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-26 20:45:33,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978357772] [2019-12-26 20:45:33,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978357772] [2019-12-26 20:45:33,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678757407] [2019-12-26 20:45:33,394 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 [2019-12-26 20:45:33,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:33,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721012718] [2019-12-26 20:45:33,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,506 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,658 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-26 20:45:33,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:33,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,659 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:33,659 INFO L226 Difference]: Without dead ends: 111 [2019-12-26 20:45:33,660 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 [2019-12-26 20:45:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-26 20:45:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-26 20:45:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:33,663 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,663 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:33,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:33,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,664 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,868 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-26 20:45:33,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122350186] [2019-12-26 20:45:33,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122350186] [2019-12-26 20:45:33,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739788026] [2019-12-26 20:45:33,924 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 [2019-12-26 20:45:33,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:33,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:34,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385326803] [2019-12-26 20:45:34,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:34,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:34,065 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,203 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-26 20:45:34,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:34,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,205 INFO L225 Difference]: With dead ends: 106 [2019-12-26 20:45:34,206 INFO L226 Difference]: Without dead ends: 105 [2019-12-26 20:45:34,206 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 [2019-12-26 20:45:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-26 20:45:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-26 20:45:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:34,210 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,210 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:34,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,211 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,415 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-26 20:45:34,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027319954] [2019-12-26 20:45:34,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027319954] [2019-12-26 20:45:34,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563045713] [2019-12-26 20:45:34,472 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 [2019-12-26 20:45:34,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:34,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:34,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744060386] [2019-12-26 20:45:34,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:34,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:34,591 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,856 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-26 20:45:34,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:34,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,857 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:34,857 INFO L226 Difference]: Without dead ends: 111 [2019-12-26 20:45:34,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-26 20:45:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-26 20:45:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:45:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-26 20:45:34,861 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-26 20:45:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,861 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-26 20:45:34,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-26 20:45:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,862 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,862 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,063 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-26 20:45:35,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356144106] [2019-12-26 20:45:35,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356144106] [2019-12-26 20:45:35,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020509622] [2019-12-26 20:45:35,130 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 [2019-12-26 20:45:35,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:35,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:35,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060415512] [2019-12-26 20:45:35,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:35,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:35,259 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-26 20:45:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,475 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-26 20:45:35,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:35,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,482 INFO L225 Difference]: With dead ends: 115 [2019-12-26 20:45:35,482 INFO L226 Difference]: Without dead ends: 114 [2019-12-26 20:45:35,482 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 [2019-12-26 20:45:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-26 20:45:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-26 20:45:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:35,485 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,486 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:35,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:35,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,487 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,691 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-26 20:45:35,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555271094] [2019-12-26 20:45:35,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555271094] [2019-12-26 20:45:35,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143673470] [2019-12-26 20:45:35,740 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 [2019-12-26 20:45:35,788 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:35,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:35,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22688159] [2019-12-26 20:45:35,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:35,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:35,874 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,117 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-26 20:45:36,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:36,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,118 INFO L225 Difference]: With dead ends: 111 [2019-12-26 20:45:36,118 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:36,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-26 20:45:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:45:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-26 20:45:36,122 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-26 20:45:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,122 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-26 20:45:36,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-26 20:45:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,123 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,123 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,324 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-26 20:45:36,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176197545] [2019-12-26 20:45:36,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176197545] [2019-12-26 20:45:36,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884178929] [2019-12-26 20:45:36,376 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 [2019-12-26 20:45:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863810422] [2019-12-26 20:45:36,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:36,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:36,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:36,503 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,678 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-26 20:45:36,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:36,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,679 INFO L225 Difference]: With dead ends: 109 [2019-12-26 20:45:36,679 INFO L226 Difference]: Without dead ends: 108 [2019-12-26 20:45:36,679 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 [2019-12-26 20:45:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-26 20:45:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-26 20:45:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-26 20:45:36,683 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-26 20:45:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,683 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-26 20:45:36,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-26 20:45:36,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,684 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,887 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-26 20:45:36,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906134251] [2019-12-26 20:45:36,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906134251] [2019-12-26 20:45:36,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877490269] [2019-12-26 20:45:36,973 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 [2019-12-26 20:45:37,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:37,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:37,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604131493] [2019-12-26 20:45:37,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,124 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-26 20:45:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,371 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-26 20:45:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:37,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,372 INFO L225 Difference]: With dead ends: 116 [2019-12-26 20:45:37,372 INFO L226 Difference]: Without dead ends: 115 [2019-12-26 20:45:37,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-26 20:45:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2019-12-26 20:45:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-26 20:45:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-26 20:45:37,377 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-26 20:45:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,377 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-26 20:45:37,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-26 20:45:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:37,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,379 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,583 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-26 20:45:37,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828682659] [2019-12-26 20:45:37,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828682659] [2019-12-26 20:45:37,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555066918] [2019-12-26 20:45:37,662 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 [2019-12-26 20:45:37,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:37,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:37,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567014258] [2019-12-26 20:45:37,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,815 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-26 20:45:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,035 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-26 20:45:38,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:38,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,037 INFO L225 Difference]: With dead ends: 115 [2019-12-26 20:45:38,037 INFO L226 Difference]: Without dead ends: 114 [2019-12-26 20:45:38,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-26 20:45:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-26 20:45:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:45:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-26 20:45:38,043 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-26 20:45:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,044 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-26 20:45:38,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-26 20:45:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:38,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,045 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,251 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-26 20:45:38,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033244557] [2019-12-26 20:45:38,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033244557] [2019-12-26 20:45:38,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593695863] [2019-12-26 20:45:38,322 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 [2019-12-26 20:45:38,387 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:38,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:38,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998261580] [2019-12-26 20:45:38,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:38,455 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-26 20:45:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,580 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-26 20:45:38,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:38,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,587 INFO L225 Difference]: With dead ends: 107 [2019-12-26 20:45:38,587 INFO L226 Difference]: Without dead ends: 106 [2019-12-26 20:45:38,588 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 [2019-12-26 20:45:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-26 20:45:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-26 20:45:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-26 20:45:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-26 20:45:38,591 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-26 20:45:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,591 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-26 20:45:38,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-26 20:45:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:38,592 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,592 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,796 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-26 20:45:38,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837913047] [2019-12-26 20:45:38,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837913047] [2019-12-26 20:45:38,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944521271] [2019-12-26 20:45:38,876 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 [2019-12-26 20:45:38,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:38,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:45:39,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-26 20:45:39,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321803097] [2019-12-26 20:45:39,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:39,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:45:39,005 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-26 20:45:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,031 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-26 20:45:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:39,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-26 20:45:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,032 INFO L225 Difference]: With dead ends: 124 [2019-12-26 20:45:39,032 INFO L226 Difference]: Without dead ends: 115 [2019-12-26 20:45:39,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:45:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-26 20:45:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-26 20:45:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-26 20:45:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-26 20:45:39,037 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-26 20:45:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,038 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-26 20:45:39,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-26 20:45:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:39,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,038 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,242 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-26 20:45:39,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429181529] [2019-12-26 20:45:39,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429181529] [2019-12-26 20:45:39,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022630537] [2019-12-26 20:45:39,316 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 [2019-12-26 20:45:39,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:39,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:39,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817602699] [2019-12-26 20:45:39,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:39,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:39,441 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-26 20:45:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,580 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-26 20:45:39,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:39,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,582 INFO L225 Difference]: With dead ends: 133 [2019-12-26 20:45:39,582 INFO L226 Difference]: Without dead ends: 132 [2019-12-26 20:45:39,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-26 20:45:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-26 20:45:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-26 20:45:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-26 20:45:39,587 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-26 20:45:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,587 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-26 20:45:39,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-26 20:45:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:39,588 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,588 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,789 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-26 20:45:39,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674245622] [2019-12-26 20:45:39,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674245622] [2019-12-26 20:45:39,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381663232] [2019-12-26 20:45:39,847 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 [2019-12-26 20:45:39,895 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:39,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:39,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581316845] [2019-12-26 20:45:39,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:39,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:39,987 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-26 20:45:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,129 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-26 20:45:40,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:40,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,131 INFO L225 Difference]: With dead ends: 140 [2019-12-26 20:45:40,131 INFO L226 Difference]: Without dead ends: 139 [2019-12-26 20:45:40,132 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 [2019-12-26 20:45:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-26 20:45:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-26 20:45:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-26 20:45:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-26 20:45:40,137 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-26 20:45:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,137 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-26 20:45:40,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-26 20:45:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:40,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,138 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,341 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-26 20:45:40,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788024570] [2019-12-26 20:45:40,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:40,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788024570] [2019-12-26 20:45:40,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921765652] [2019-12-26 20:45:40,404 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 [2019-12-26 20:45:40,456 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:40,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:40,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:42,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313010424] [2019-12-26 20:45:42,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:42,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:42,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=115, Unknown=1, NotChecked=0, Total=182 [2019-12-26 20:45:42,976 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-26 20:45:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,153 INFO L93 Difference]: Finished difference Result 142 states and 323 transitions. [2019-12-26 20:45:43,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:43,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,154 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:43,155 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:43,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=142, Invalid=237, Unknown=1, NotChecked=0, Total=380 [2019-12-26 20:45:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-12-26 20:45:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-26 20:45:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-26 20:45:43,159 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-26 20:45:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,159 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-26 20:45:43,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-26 20:45:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,160 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:43,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:43,364 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-26 20:45:43,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:43,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425875655] [2019-12-26 20:45:43,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425875655] [2019-12-26 20:45:43,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113235024] [2019-12-26 20:45:43,427 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 [2019-12-26 20:45:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:43,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:43,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:43,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:43,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377009140] [2019-12-26 20:45:43,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:43,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:43,552 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-26 20:45:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,684 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-26 20:45:43,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:43,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,686 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:43,686 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:43,687 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 [2019-12-26 20:45:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-26 20:45:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:45:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-26 20:45:43,692 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-26 20:45:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,692 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-26 20:45:43,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-26 20:45:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,693 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:43,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:43,896 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-26 20:45:43,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:43,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450453128] [2019-12-26 20:45:43,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450453128] [2019-12-26 20:45:43,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453570951] [2019-12-26 20:45:43,965 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 [2019-12-26 20:45:44,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:44,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:44,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:44,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911316121] [2019-12-26 20:45:44,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:44,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:44,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:44,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:44,128 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-26 20:45:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:44,755 INFO L93 Difference]: Finished difference Result 154 states and 350 transitions. [2019-12-26 20:45:44,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:44,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:44,757 INFO L225 Difference]: With dead ends: 154 [2019-12-26 20:45:44,757 INFO L226 Difference]: Without dead ends: 153 [2019-12-26 20:45:44,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-26 20:45:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2019-12-26 20:45:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:45:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-26 20:45:44,762 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-26 20:45:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:44,762 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-26 20:45:44,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-26 20:45:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:44,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:44,763 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,966 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-26 20:45:44,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752208248] [2019-12-26 20:45:44,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752208248] [2019-12-26 20:45:45,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013451082] [2019-12-26 20:45:45,044 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 [2019-12-26 20:45:45,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:45,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596800554] [2019-12-26 20:45:45,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,216 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 14 states. [2019-12-26 20:45:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:45,447 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2019-12-26 20:45:45,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:45,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:45,449 INFO L225 Difference]: With dead ends: 158 [2019-12-26 20:45:45,449 INFO L226 Difference]: Without dead ends: 157 [2019-12-26 20:45:45,449 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 [2019-12-26 20:45:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-26 20:45:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2019-12-26 20:45:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:45:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-26 20:45:45,453 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-26 20:45:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:45,453 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-26 20:45:45,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-26 20:45:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:45,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:45,454 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:45,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:45,655 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:45,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-26 20:45:45,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:45,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148204414] [2019-12-26 20:45:45,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148204414] [2019-12-26 20:45:45,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271854174] [2019-12-26 20:45:45,727 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 [2019-12-26 20:45:45,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:45,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530437339] [2019-12-26 20:45:45,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,890 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-26 20:45:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,143 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2019-12-26 20:45:46,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:46,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,145 INFO L225 Difference]: With dead ends: 146 [2019-12-26 20:45:46,145 INFO L226 Difference]: Without dead ends: 145 [2019-12-26 20:45:46,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-26 20:45:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2019-12-26 20:45:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:45:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-26 20:45:46,151 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-26 20:45:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,151 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-26 20:45:46,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-26 20:45:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,152 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,357 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-26 20:45:46,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533162751] [2019-12-26 20:45:46,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533162751] [2019-12-26 20:45:46,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995219959] [2019-12-26 20:45:46,450 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 [2019-12-26 20:45:46,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:46,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:46,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:46,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043059642] [2019-12-26 20:45:46,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:46,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:46,570 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 14 states. [2019-12-26 20:45:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,683 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-26 20:45:46,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:46,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,685 INFO L225 Difference]: With dead ends: 143 [2019-12-26 20:45:46,685 INFO L226 Difference]: Without dead ends: 142 [2019-12-26 20:45:46,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-26 20:45:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-26 20:45:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:45:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-26 20:45:46,691 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-26 20:45:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,691 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-26 20:45:46,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-26 20:45:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,692 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,893 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-26 20:45:46,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663089760] [2019-12-26 20:45:46,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663089760] [2019-12-26 20:45:46,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19712065] [2019-12-26 20:45:46,973 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 [2019-12-26 20:45:47,016 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:47,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:47,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877724114] [2019-12-26 20:45:47,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:47,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:47,095 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-26 20:45:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,285 INFO L93 Difference]: Finished difference Result 159 states and 361 transitions. [2019-12-26 20:45:47,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:47,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,287 INFO L225 Difference]: With dead ends: 159 [2019-12-26 20:45:47,287 INFO L226 Difference]: Without dead ends: 158 [2019-12-26 20:45:47,288 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 [2019-12-26 20:45:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-26 20:45:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2019-12-26 20:45:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:45:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-26 20:45:47,291 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-26 20:45:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,292 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-26 20:45:47,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-26 20:45:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,292 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,292 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,496 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-26 20:45:47,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866854281] [2019-12-26 20:45:47,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866854281] [2019-12-26 20:45:47,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628233684] [2019-12-26 20:45:47,563 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 [2019-12-26 20:45:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:47,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604966217] [2019-12-26 20:45:47,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:47,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:47,693 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-26 20:45:48,296 WARN L192 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-26 20:45:48,810 WARN L192 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-26 20:45:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,251 INFO L93 Difference]: Finished difference Result 170 states and 378 transitions. [2019-12-26 20:45:49,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:49,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,254 INFO L225 Difference]: With dead ends: 170 [2019-12-26 20:45:49,254 INFO L226 Difference]: Without dead ends: 169 [2019-12-26 20:45:49,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-26 20:45:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2019-12-26 20:45:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:45:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-26 20:45:49,259 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-26 20:45:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,259 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-26 20:45:49,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-26 20:45:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:49,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,260 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,463 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-26 20:45:49,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873530310] [2019-12-26 20:45:49,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873530310] [2019-12-26 20:45:49,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566411698] [2019-12-26 20:45:49,544 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 [2019-12-26 20:45:49,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:49,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:49,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645591922] [2019-12-26 20:45:49,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:49,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:49,677 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-26 20:45:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,941 INFO L93 Difference]: Finished difference Result 167 states and 376 transitions. [2019-12-26 20:45:49,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:49,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,943 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:45:49,944 INFO L226 Difference]: Without dead ends: 165 [2019-12-26 20:45:49,944 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 [2019-12-26 20:45:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-26 20:45:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-26 20:45:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-26 20:45:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-26 20:45:49,949 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-26 20:45:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,949 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-26 20:45:49,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-26 20:45:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:49,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,950 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,152 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-26 20:45:50,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723265575] [2019-12-26 20:45:50,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723265575] [2019-12-26 20:45:50,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453553335] [2019-12-26 20:45:50,217 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 [2019-12-26 20:45:50,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:50,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:50,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:50,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395224416] [2019-12-26 20:45:50,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:50,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:50,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:50,353 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-26 20:45:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:50,554 INFO L93 Difference]: Finished difference Result 169 states and 380 transitions. [2019-12-26 20:45:50,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:50,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:50,556 INFO L225 Difference]: With dead ends: 169 [2019-12-26 20:45:50,556 INFO L226 Difference]: Without dead ends: 168 [2019-12-26 20:45:50,556 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 [2019-12-26 20:45:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-26 20:45:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2019-12-26 20:45:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:45:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-26 20:45:50,561 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-26 20:45:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:50,561 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-26 20:45:50,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-26 20:45:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:50,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:50,562 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,765 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-26 20:45:50,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673415899] [2019-12-26 20:45:50,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673415899] [2019-12-26 20:45:50,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005888907] [2019-12-26 20:45:50,845 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 [2019-12-26 20:45:50,890 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:50,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:50,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603259458] [2019-12-26 20:45:50,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:50,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:50,986 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-26 20:45:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,195 INFO L93 Difference]: Finished difference Result 166 states and 380 transitions. [2019-12-26 20:45:51,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:51,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,197 INFO L225 Difference]: With dead ends: 166 [2019-12-26 20:45:51,197 INFO L226 Difference]: Without dead ends: 165 [2019-12-26 20:45:51,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-26 20:45:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-26 20:45:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-26 20:45:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-26 20:45:51,203 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-26 20:45:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,203 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-26 20:45:51,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-26 20:45:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:51,204 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,204 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:51,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,407 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-26 20:45:51,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:51,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269900519] [2019-12-26 20:45:51,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:51,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269900519] [2019-12-26 20:45:51,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659200501] [2019-12-26 20:45:51,466 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:45:51,513 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:51,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:51,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:51,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:51,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:51,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:51,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163221395] [2019-12-26 20:45:51,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:51,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:51,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:51,596 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-26 20:45:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,818 INFO L93 Difference]: Finished difference Result 163 states and 371 transitions. [2019-12-26 20:45:51,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:51,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,820 INFO L225 Difference]: With dead ends: 163 [2019-12-26 20:45:51,820 INFO L226 Difference]: Without dead ends: 162 [2019-12-26 20:45:51,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-26 20:45:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-26 20:45:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:45:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-26 20:45:51,824 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-26 20:45:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,825 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-26 20:45:51,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-26 20:45:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:51,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,825 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,029 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-26 20:45:52,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446160390] [2019-12-26 20:45:52,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446160390] [2019-12-26 20:45:52,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304559604] [2019-12-26 20:45:52,100 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 [2019-12-26 20:45:52,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:52,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:52,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650215435] [2019-12-26 20:45:52,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,240 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-26 20:45:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:52,458 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2019-12-26 20:45:52,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:52,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:52,460 INFO L225 Difference]: With dead ends: 152 [2019-12-26 20:45:52,461 INFO L226 Difference]: Without dead ends: 151 [2019-12-26 20:45:52,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-26 20:45:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2019-12-26 20:45:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:45:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-26 20:45:52,466 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-26 20:45:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:52,466 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-26 20:45:52,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-26 20:45:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:52,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:52,467 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,671 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-26 20:45:52,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539987390] [2019-12-26 20:45:52,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539987390] [2019-12-26 20:45:52,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351503399] [2019-12-26 20:45:52,743 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 [2019-12-26 20:45:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709125407] [2019-12-26 20:45:52,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,904 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-26 20:45:53,388 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-26 20:45:53,956 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:45:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:53,996 INFO L93 Difference]: Finished difference Result 167 states and 372 transitions. [2019-12-26 20:45:53,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:53,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:53,998 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:45:53,998 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:45:53,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:45:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-26 20:45:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:45:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-26 20:45:54,003 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-26 20:45:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:54,003 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-26 20:45:54,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-26 20:45:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:54,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:54,004 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:54,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:54,205 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-26 20:45:54,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:54,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335239601] [2019-12-26 20:45:54,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335239601] [2019-12-26 20:45:54,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201752707] [2019-12-26 20:45:54,275 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 [2019-12-26 20:45:54,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:54,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:54,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:54,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:54,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:54,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899550042] [2019-12-26 20:45:54,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:54,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:54,463 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 14 states. [2019-12-26 20:45:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:54,729 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2019-12-26 20:45:54,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:54,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:54,732 INFO L225 Difference]: With dead ends: 160 [2019-12-26 20:45:54,732 INFO L226 Difference]: Without dead ends: 159 [2019-12-26 20:45:54,732 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 [2019-12-26 20:45:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-26 20:45:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2019-12-26 20:45:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:45:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-26 20:45:54,737 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-26 20:45:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:54,737 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-26 20:45:54,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-26 20:45:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:54,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:54,738 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:54,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:54,941 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-26 20:45:54,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:54,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652937617] [2019-12-26 20:45:54,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652937617] [2019-12-26 20:45:55,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389132524] [2019-12-26 20:45:55,011 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 [2019-12-26 20:45:55,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:55,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:55,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:55,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:55,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594459466] [2019-12-26 20:45:55,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:55,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:55,169 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-26 20:45:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,527 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2019-12-26 20:45:55,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:55,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,528 INFO L225 Difference]: With dead ends: 162 [2019-12-26 20:45:55,528 INFO L226 Difference]: Without dead ends: 161 [2019-12-26 20:45:55,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-26 20:45:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2019-12-26 20:45:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-26 20:45:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-26 20:45:55,533 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-26 20:45:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,534 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-26 20:45:55,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-26 20:45:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:55,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,535 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,738 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-26 20:45:55,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121887990] [2019-12-26 20:45:55,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121887990] [2019-12-26 20:45:55,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302809795] [2019-12-26 20:45:55,799 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 [2019-12-26 20:45:55,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:55,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:55,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:55,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:55,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559233831] [2019-12-26 20:45:55,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:55,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:55,958 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-26 20:45:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:56,968 INFO L93 Difference]: Finished difference Result 178 states and 396 transitions. [2019-12-26 20:45:56,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:56,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:56,970 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:45:56,970 INFO L226 Difference]: Without dead ends: 176 [2019-12-26 20:45:56,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-26 20:45:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-26 20:45:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-26 20:45:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-26 20:45:56,974 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-26 20:45:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:56,975 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-26 20:45:56,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-26 20:45:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:56,975 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:56,975 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:57,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,176 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-26 20:45:57,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:57,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710905320] [2019-12-26 20:45:57,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710905320] [2019-12-26 20:45:57,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225686348] [2019-12-26 20:45:57,246 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 [2019-12-26 20:45:57,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:57,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:57,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:57,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:57,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:57,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935967511] [2019-12-26 20:45:57,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:57,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:57,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:57,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:57,395 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-26 20:45:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,697 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2019-12-26 20:45:57,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:57,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,699 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:45:57,699 INFO L226 Difference]: Without dead ends: 176 [2019-12-26 20:45:57,699 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 [2019-12-26 20:45:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-26 20:45:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-26 20:45:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:45:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-26 20:45:57,703 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-26 20:45:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,704 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-26 20:45:57,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-26 20:45:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:57,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,704 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:57,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,905 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:57,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-26 20:45:57,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:57,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123380248] [2019-12-26 20:45:57,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123380248] [2019-12-26 20:45:58,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515014236] [2019-12-26 20:45:58,003 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 [2019-12-26 20:45:58,067 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:58,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:58,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:58,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:58,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:58,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521227041] [2019-12-26 20:45:58,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:58,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:58,198 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-26 20:45:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:58,544 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-26 20:45:58,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:58,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:58,546 INFO L225 Difference]: With dead ends: 161 [2019-12-26 20:45:58,546 INFO L226 Difference]: Without dead ends: 160 [2019-12-26 20:45:58,546 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 [2019-12-26 20:45:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-26 20:45:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2019-12-26 20:45:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:45:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-26 20:45:58,550 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-26 20:45:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:58,550 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-26 20:45:58,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-26 20:45:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:58,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:58,551 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:58,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:58,754 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-26 20:45:58,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:58,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794275562] [2019-12-26 20:45:58,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794275562] [2019-12-26 20:45:58,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858031507] [2019-12-26 20:45:58,845 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 [2019-12-26 20:45:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:58,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:58,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:58,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:58,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673497969] [2019-12-26 20:45:58,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:58,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:58,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:58,994 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-26 20:45:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:59,331 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2019-12-26 20:45:59,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:59,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:59,333 INFO L225 Difference]: With dead ends: 179 [2019-12-26 20:45:59,333 INFO L226 Difference]: Without dead ends: 178 [2019-12-26 20:45:59,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-26 20:45:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-26 20:45:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-26 20:45:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-26 20:45:59,337 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-26 20:45:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:59,337 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-26 20:45:59,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-26 20:45:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:59,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:59,338 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:59,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:59,541 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-26 20:45:59,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:59,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882921342] [2019-12-26 20:45:59,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:59,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882921342] [2019-12-26 20:45:59,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504232132] [2019-12-26 20:45:59,614 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 [2019-12-26 20:45:59,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:59,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:59,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:59,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:59,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:59,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:59,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620114256] [2019-12-26 20:45:59,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:59,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:59,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:59,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:59,737 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-26 20:45:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:59,973 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-26 20:45:59,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:59,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:59,976 INFO L225 Difference]: With dead ends: 182 [2019-12-26 20:45:59,976 INFO L226 Difference]: Without dead ends: 180 [2019-12-26 20:45:59,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-26 20:45:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 129. [2019-12-26 20:45:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:45:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-26 20:45:59,981 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-26 20:45:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:59,981 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-26 20:45:59,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-26 20:45:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:59,982 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:59,988 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:00,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:00,191 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-26 20:46:00,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:00,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101023712] [2019-12-26 20:46:00,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:00,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101023712] [2019-12-26 20:46:00,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316362995] [2019-12-26 20:46:00,252 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 [2019-12-26 20:46:00,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:46:00,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:00,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:46:00,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:00,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:00,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:46:00,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283269858] [2019-12-26 20:46:00,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:46:00,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:46:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:46:00,369 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-26 20:46:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:00,652 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-26 20:46:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:00,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:46:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:00,654 INFO L225 Difference]: With dead ends: 179 [2019-12-26 20:46:00,654 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:46:00,654 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 [2019-12-26 20:46:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:46:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-26 20:46:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:46:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 311 transitions. [2019-12-26 20:46:00,657 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 311 transitions. Word has length 12 [2019-12-26 20:46:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:00,658 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 311 transitions. [2019-12-26 20:46:00,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:46:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 311 transitions. [2019-12-26 20:46:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:46:00,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:00,658 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:00,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:00,859 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-26 20:46:00,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:00,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387237109] [2019-12-26 20:46:00,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:00,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387237109] [2019-12-26 20:46:00,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669286116] [2019-12-26 20:46:00,938 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 [2019-12-26 20:46:00,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:00,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:00,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:46:00,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:01,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:46:01,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086502025] [2019-12-26 20:46:01,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:46:01,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:46:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:46:01,086 INFO L87 Difference]: Start difference. First operand 131 states and 311 transitions. Second operand 14 states. [2019-12-26 20:46:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:01,965 INFO L93 Difference]: Finished difference Result 176 states and 396 transitions. [2019-12-26 20:46:01,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:01,965 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:46:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:01,967 INFO L225 Difference]: With dead ends: 176 [2019-12-26 20:46:01,967 INFO L226 Difference]: Without dead ends: 175 [2019-12-26 20:46:01,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:46:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-26 20:46:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-26 20:46:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-26 20:46:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-26 20:46:01,971 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-26 20:46:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:01,972 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-26 20:46:01,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:46:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-26 20:46:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:46:01,972 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:01,973 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,176 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,176 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-26 20:46:02,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653323849] [2019-12-26 20:46:02,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653323849] [2019-12-26 20:46:02,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490778443] [2019-12-26 20:46:02,245 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 [2019-12-26 20:46:02,288 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:46:02,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:02,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81251280] [2019-12-26 20:46:02,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:02,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:02,380 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 16 states. [2019-12-26 20:46:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,546 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-26 20:46:02,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:02,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:46:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,548 INFO L225 Difference]: With dead ends: 143 [2019-12-26 20:46:02,548 INFO L226 Difference]: Without dead ends: 142 [2019-12-26 20:46:02,548 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 [2019-12-26 20:46:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-26 20:46:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-26 20:46:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-26 20:46:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-26 20:46:02,552 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-26 20:46:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,553 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-26 20:46:02,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-26 20:46:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:02,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,554 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,757 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-26 20:46:02,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418940272] [2019-12-26 20:46:02,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418940272] [2019-12-26 20:46:02,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235251913] [2019-12-26 20:46:02,828 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 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 [2019-12-26 20:46:02,871 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:02,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:02,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782697549] [2019-12-26 20:46:02,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:02,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:02,973 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 16 states. [2019-12-26 20:46:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:03,131 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-26 20:46:03,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:03,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:03,132 INFO L225 Difference]: With dead ends: 154 [2019-12-26 20:46:03,133 INFO L226 Difference]: Without dead ends: 152 [2019-12-26 20:46:03,133 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 [2019-12-26 20:46:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-26 20:46:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-26 20:46:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-26 20:46:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-26 20:46:03,136 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-26 20:46:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:03,137 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-26 20:46:03,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-26 20:46:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:03,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:03,137 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:03,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:03,338 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-26 20:46:03,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:03,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893037171] [2019-12-26 20:46:03,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:03,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893037171] [2019-12-26 20:46:03,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791218501] [2019-12-26 20:46:03,407 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 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 [2019-12-26 20:46:03,450 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:03,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:03,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:03,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:03,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:03,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:03,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014392019] [2019-12-26 20:46:03,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:03,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:03,546 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 16 states. [2019-12-26 20:46:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:03,721 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-26 20:46:03,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:03,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:03,723 INFO L225 Difference]: With dead ends: 163 [2019-12-26 20:46:03,723 INFO L226 Difference]: Without dead ends: 162 [2019-12-26 20:46:03,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:46:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-26 20:46:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-26 20:46:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:46:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-26 20:46:03,728 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-26 20:46:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:03,728 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-26 20:46:03,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-26 20:46:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:03,729 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:03,729 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:03,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:03,932 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-26 20:46:03,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:03,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592266232] [2019-12-26 20:46:03,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:04,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592266232] [2019-12-26 20:46:04,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512298270] [2019-12-26 20:46:04,015 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 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 [2019-12-26 20:46:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:04,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:04,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:04,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:04,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:04,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937441894] [2019-12-26 20:46:04,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:04,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:04,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:04,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:04,423 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 16 states. [2019-12-26 20:46:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:04,638 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2019-12-26 20:46:04,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:46:04,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:04,640 INFO L225 Difference]: With dead ends: 164 [2019-12-26 20:46:04,641 INFO L226 Difference]: Without dead ends: 161 [2019-12-26 20:46:04,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:46:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-26 20:46:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-12-26 20:46:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:46:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-26 20:46:04,645 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-26 20:46:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:04,645 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-26 20:46:04,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-26 20:46:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:04,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:04,646 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:04,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:04,849 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-26 20:46:04,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:04,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024814735] [2019-12-26 20:46:04,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:04,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024814735] [2019-12-26 20:46:04,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888045324] [2019-12-26 20:46:04,931 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 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 [2019-12-26 20:46:04,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:04,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:04,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:04,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:05,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:05,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29821246] [2019-12-26 20:46:05,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:05,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:05,055 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 16 states. [2019-12-26 20:46:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:05,217 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-26 20:46:05,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:05,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:05,218 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:05,219 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:05,219 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 [2019-12-26 20:46:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-26 20:46:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-26 20:46:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-26 20:46:05,222 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-26 20:46:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:05,223 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-26 20:46:05,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-26 20:46:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:05,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:05,224 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:05,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:05,424 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-26 20:46:05,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:05,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172387600] [2019-12-26 20:46:05,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172387600] [2019-12-26 20:46:05,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624476328] [2019-12-26 20:46:05,500 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 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 [2019-12-26 20:46:05,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:05,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:05,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:05,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:05,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:05,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360961828] [2019-12-26 20:46:05,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:05,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:05,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:05,841 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-26 20:46:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:06,104 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2019-12-26 20:46:06,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:46:06,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:06,106 INFO L225 Difference]: With dead ends: 179 [2019-12-26 20:46:06,106 INFO L226 Difference]: Without dead ends: 178 [2019-12-26 20:46:06,107 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 [2019-12-26 20:46:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-26 20:46:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2019-12-26 20:46:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:46:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-26 20:46:06,111 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-26 20:46:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:06,111 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-26 20:46:06,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-26 20:46:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:06,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:06,112 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:06,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:06,315 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-26 20:46:06,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:06,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134209846] [2019-12-26 20:46:06,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134209846] [2019-12-26 20:46:06,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010460490] [2019-12-26 20:46:06,393 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 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 [2019-12-26 20:46:06,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:06,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:06,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:06,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:06,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:06,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004249283] [2019-12-26 20:46:06,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:06,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:06,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:06,594 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 16 states. [2019-12-26 20:46:06,815 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:07,003 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2019-12-26 20:46:07,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:46:07,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:07,006 INFO L225 Difference]: With dead ends: 188 [2019-12-26 20:46:07,006 INFO L226 Difference]: Without dead ends: 187 [2019-12-26 20:46:07,007 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 [2019-12-26 20:46:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-26 20:46:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2019-12-26 20:46:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-26 20:46:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-26 20:46:07,011 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-26 20:46:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:07,011 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-26 20:46:07,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-26 20:46:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:07,012 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:07,012 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:07,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:07,217 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-26 20:46:07,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:07,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415624958] [2019-12-26 20:46:07,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:07,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415624958] [2019-12-26 20:46:07,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103233013] [2019-12-26 20:46:07,300 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 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 [2019-12-26 20:46:07,358 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:07,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:07,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:07,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:08,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:08,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:08,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551988765] [2019-12-26 20:46:08,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:08,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=152, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:08,240 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-26 20:46:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:08,564 INFO L93 Difference]: Finished difference Result 168 states and 377 transitions. [2019-12-26 20:46:08,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:46:08,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:08,566 INFO L225 Difference]: With dead ends: 168 [2019-12-26 20:46:08,566 INFO L226 Difference]: Without dead ends: 164 [2019-12-26 20:46:08,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=342, Unknown=1, NotChecked=0, Total=552 [2019-12-26 20:46:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-26 20:46:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2019-12-26 20:46:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:46:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-26 20:46:08,570 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-26 20:46:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:08,570 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-26 20:46:08,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-26 20:46:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:08,571 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:08,571 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:08,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:08,774 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-26 20:46:08,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:08,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854956163] [2019-12-26 20:46:08,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:08,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854956163] [2019-12-26 20:46:08,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628306725] [2019-12-26 20:46:08,849 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 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 [2019-12-26 20:46:08,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:08,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:08,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:08,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:09,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212728399] [2019-12-26 20:46:09,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:09,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:09,001 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 16 states. [2019-12-26 20:46:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:09,169 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-26 20:46:09,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:09,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:09,171 INFO L225 Difference]: With dead ends: 165 [2019-12-26 20:46:09,171 INFO L226 Difference]: Without dead ends: 164 [2019-12-26 20:46:09,171 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 [2019-12-26 20:46:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-26 20:46:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-26 20:46:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-26 20:46:09,175 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-26 20:46:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:09,175 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-26 20:46:09,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-26 20:46:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:09,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:09,176 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:09,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:09,379 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-26 20:46:09,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:09,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488052912] [2019-12-26 20:46:09,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488052912] [2019-12-26 20:46:09,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245957412] [2019-12-26 20:46:09,456 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 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 [2019-12-26 20:46:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:09,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:09,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:09,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805741319] [2019-12-26 20:46:09,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:09,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:09,613 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-26 20:46:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:09,929 INFO L93 Difference]: Finished difference Result 190 states and 429 transitions. [2019-12-26 20:46:09,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:09,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:09,931 INFO L225 Difference]: With dead ends: 190 [2019-12-26 20:46:09,931 INFO L226 Difference]: Without dead ends: 189 [2019-12-26 20:46:09,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-26 20:46:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2019-12-26 20:46:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:46:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-26 20:46:09,935 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-26 20:46:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:09,935 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-26 20:46:09,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-26 20:46:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:09,936 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:09,936 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:10,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,139 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-26 20:46:10,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:10,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831618882] [2019-12-26 20:46:10,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:10,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831618882] [2019-12-26 20:46:10,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989315481] [2019-12-26 20:46:10,215 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 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 [2019-12-26 20:46:10,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:10,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:10,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:10,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:10,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:10,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:10,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246009749] [2019-12-26 20:46:10,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:10,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:10,375 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 16 states. [2019-12-26 20:46:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:10,721 INFO L93 Difference]: Finished difference Result 200 states and 448 transitions. [2019-12-26 20:46:10,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:10,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:10,723 INFO L225 Difference]: With dead ends: 200 [2019-12-26 20:46:10,723 INFO L226 Difference]: Without dead ends: 199 [2019-12-26 20:46:10,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-26 20:46:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2019-12-26 20:46:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-26 20:46:10,728 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-26 20:46:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:10,728 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-26 20:46:10,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-26 20:46:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:10,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:10,729 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:10,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,929 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-26 20:46:10,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:10,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18031520] [2019-12-26 20:46:10,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:11,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18031520] [2019-12-26 20:46:11,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936417799] [2019-12-26 20:46:11,006 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 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 [2019-12-26 20:46:11,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:46:11,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:11,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:11,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:11,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:11,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:11,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124300348] [2019-12-26 20:46:11,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:11,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:11,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:11,195 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-26 20:46:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:12,088 INFO L93 Difference]: Finished difference Result 198 states and 437 transitions. [2019-12-26 20:46:12,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:12,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:12,090 INFO L225 Difference]: With dead ends: 198 [2019-12-26 20:46:12,090 INFO L226 Difference]: Without dead ends: 192 [2019-12-26 20:46:12,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-26 20:46:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2019-12-26 20:46:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-26 20:46:12,095 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-26 20:46:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:12,095 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-26 20:46:12,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-26 20:46:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:12,096 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:12,096 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:12,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:12,299 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-26 20:46:12,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:12,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535674853] [2019-12-26 20:46:12,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535674853] [2019-12-26 20:46:12,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723733417] [2019-12-26 20:46:12,366 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 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 [2019-12-26 20:46:12,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:12,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:12,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:12,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:12,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:12,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417538970] [2019-12-26 20:46:12,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:12,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:12,531 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-26 20:46:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:13,738 INFO L93 Difference]: Finished difference Result 195 states and 440 transitions. [2019-12-26 20:46:13,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:13,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:13,741 INFO L225 Difference]: With dead ends: 195 [2019-12-26 20:46:13,741 INFO L226 Difference]: Without dead ends: 194 [2019-12-26 20:46:13,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-26 20:46:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2019-12-26 20:46:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:46:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-26 20:46:13,745 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-26 20:46:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:13,745 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-26 20:46:13,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-26 20:46:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:13,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:13,746 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:13,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:13,946 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-26 20:46:13,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:13,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710732847] [2019-12-26 20:46:13,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710732847] [2019-12-26 20:46:14,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568776447] [2019-12-26 20:46:14,013 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 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 [2019-12-26 20:46:14,055 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:14,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:14,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:14,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:14,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:14,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748897524] [2019-12-26 20:46:14,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:14,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:14,247 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-26 20:46:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:14,754 INFO L93 Difference]: Finished difference Result 201 states and 456 transitions. [2019-12-26 20:46:14,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:14,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:14,756 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:46:14,757 INFO L226 Difference]: Without dead ends: 200 [2019-12-26 20:46:14,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-26 20:46:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-26 20:46:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-26 20:46:14,762 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-26 20:46:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:14,763 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-26 20:46:14,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-26 20:46:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:14,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:14,764 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:14,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:14,965 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-26 20:46:14,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:14,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167393824] [2019-12-26 20:46:14,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:15,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167393824] [2019-12-26 20:46:15,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758391019] [2019-12-26 20:46:15,078 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 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 [2019-12-26 20:46:15,153 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:15,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:15,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:15,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:15,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:15,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:15,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713665429] [2019-12-26 20:46:15,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:15,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:15,356 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-26 20:46:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:18,010 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-26 20:46:18,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:18,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:18,012 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:18,012 INFO L226 Difference]: Without dead ends: 185 [2019-12-26 20:46:18,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=217, Invalid=382, Unknown=1, NotChecked=0, Total=600 [2019-12-26 20:46:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-26 20:46:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2019-12-26 20:46:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-26 20:46:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-26 20:46:18,015 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-26 20:46:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:18,016 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-26 20:46:18,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-26 20:46:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:18,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:18,016 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:18,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:18,217 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-26 20:46:18,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:18,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106284907] [2019-12-26 20:46:18,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106284907] [2019-12-26 20:46:18,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318072418] [2019-12-26 20:46:18,306 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 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 [2019-12-26 20:46:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:18,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:18,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:18,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:18,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969006996] [2019-12-26 20:46:18,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:18,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:18,433 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 16 states. [2019-12-26 20:46:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:18,584 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-26 20:46:18,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:18,585 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:18,586 INFO L225 Difference]: With dead ends: 162 [2019-12-26 20:46:18,586 INFO L226 Difference]: Without dead ends: 161 [2019-12-26 20:46:18,587 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 [2019-12-26 20:46:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-26 20:46:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-26 20:46:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-26 20:46:18,597 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-26 20:46:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:18,597 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-26 20:46:18,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-26 20:46:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:18,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:18,598 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:18,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:18,801 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-26 20:46:18,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:18,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456971176] [2019-12-26 20:46:18,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456971176] [2019-12-26 20:46:18,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799415011] [2019-12-26 20:46:18,870 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 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 [2019-12-26 20:46:18,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:18,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:18,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:18,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:18,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:18,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950328322] [2019-12-26 20:46:18,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:18,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:19,000 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-26 20:46:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:19,259 INFO L93 Difference]: Finished difference Result 183 states and 412 transitions. [2019-12-26 20:46:19,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:19,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:19,261 INFO L225 Difference]: With dead ends: 183 [2019-12-26 20:46:19,261 INFO L226 Difference]: Without dead ends: 182 [2019-12-26 20:46:19,261 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 [2019-12-26 20:46:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-26 20:46:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-26 20:46:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:46:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-26 20:46:19,264 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-26 20:46:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:19,264 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-26 20:46:19,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-26 20:46:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:19,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:19,265 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:19,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:19,466 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-26 20:46:19,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:19,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010177222] [2019-12-26 20:46:19,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:19,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010177222] [2019-12-26 20:46:19,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490520427] [2019-12-26 20:46:19,546 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 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 [2019-12-26 20:46:19,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:19,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:19,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:19,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:20,067 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_218 Int)) (and (<= c_~j~0 (+ v_~i~0_218 2)) (<= (div (+ (* v_~i~0_218 (- 1)) 1) (- 3)) 2) (<= c_~i~0 (+ c_~j~0 v_~i~0_218)))) is different from true [2019-12-26 20:46:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:20,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:20,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118745335] [2019-12-26 20:46:20,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:20,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=143, Unknown=1, NotChecked=26, Total=240 [2019-12-26 20:46:20,069 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 16 states. [2019-12-26 20:46:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:20,462 INFO L93 Difference]: Finished difference Result 206 states and 460 transitions. [2019-12-26 20:46:20,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:20,462 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:20,464 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:46:20,464 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:46:20,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=428, Unknown=1, NotChecked=48, Total=702 [2019-12-26 20:46:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:46:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 141. [2019-12-26 20:46:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-26 20:46:20,467 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-26 20:46:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:20,468 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-26 20:46:20,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-26 20:46:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:20,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:20,468 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:20,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:20,672 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-26 20:46:20,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:20,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193980562] [2019-12-26 20:46:20,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193980562] [2019-12-26 20:46:20,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959899544] [2019-12-26 20:46:20,751 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 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 [2019-12-26 20:46:20,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:20,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:20,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:20,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:20,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:20,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529063617] [2019-12-26 20:46:20,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:20,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:20,894 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-26 20:46:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:21,221 INFO L93 Difference]: Finished difference Result 192 states and 432 transitions. [2019-12-26 20:46:21,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:21,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:21,223 INFO L225 Difference]: With dead ends: 192 [2019-12-26 20:46:21,224 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:21,224 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 [2019-12-26 20:46:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-26 20:46:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:46:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-26 20:46:21,228 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-26 20:46:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:21,228 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-26 20:46:21,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-26 20:46:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:21,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:21,229 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:21,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:21,433 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-26 20:46:21,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:21,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648718317] [2019-12-26 20:46:21,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:21,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648718317] [2019-12-26 20:46:21,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186790254] [2019-12-26 20:46:21,523 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 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 [2019-12-26 20:46:21,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:21,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:21,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:21,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:21,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:21,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:21,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899768226] [2019-12-26 20:46:21,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:21,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:21,681 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 16 states. [2019-12-26 20:46:22,366 WARN L192 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:23,005 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:24,365 INFO L93 Difference]: Finished difference Result 208 states and 458 transitions. [2019-12-26 20:46:24,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:24,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:24,367 INFO L225 Difference]: With dead ends: 208 [2019-12-26 20:46:24,367 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:46:24,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=465, Unknown=1, NotChecked=0, Total=702 [2019-12-26 20:46:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:46:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-26 20:46:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-26 20:46:24,371 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-26 20:46:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:24,372 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-26 20:46:24,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-26 20:46:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:24,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:24,372 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:24,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:24,575 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-26 20:46:24,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:24,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703989796] [2019-12-26 20:46:24,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:24,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703989796] [2019-12-26 20:46:24,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323158455] [2019-12-26 20:46:24,659 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 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 [2019-12-26 20:46:24,709 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:24,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:24,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:24,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:25,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:25,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:25,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416351787] [2019-12-26 20:46:25,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:25,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:25,266 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-26 20:46:25,871 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-26 20:46:26,543 WARN L192 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-26 20:46:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:26,678 INFO L93 Difference]: Finished difference Result 224 states and 504 transitions. [2019-12-26 20:46:26,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:26,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:26,680 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:46:26,680 INFO L226 Difference]: Without dead ends: 222 [2019-12-26 20:46:26,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-26 20:46:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-12-26 20:46:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:46:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-26 20:46:26,684 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-26 20:46:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:26,685 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-26 20:46:26,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-26 20:46:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:26,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:26,685 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:26,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:26,886 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-26 20:46:26,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:26,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890909646] [2019-12-26 20:46:26,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:26,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890909646] [2019-12-26 20:46:26,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840738962] [2019-12-26 20:46:26,974 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 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 [2019-12-26 20:46:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:27,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:27,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:27,547 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_231 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_231)) (<= (div (+ (* v_~i~0_231 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~i~0_231) 2)))) is different from true [2019-12-26 20:46:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:27,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:27,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:27,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058804524] [2019-12-26 20:46:27,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:27,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=141, Unknown=1, NotChecked=26, Total=240 [2019-12-26 20:46:27,549 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-26 20:46:28,363 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-26 20:46:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:28,429 INFO L93 Difference]: Finished difference Result 216 states and 490 transitions. [2019-12-26 20:46:28,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:28,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:28,431 INFO L225 Difference]: With dead ends: 216 [2019-12-26 20:46:28,431 INFO L226 Difference]: Without dead ends: 215 [2019-12-26 20:46:28,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=535, Unknown=1, NotChecked=54, Total=870 [2019-12-26 20:46:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-26 20:46:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2019-12-26 20:46:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:46:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-26 20:46:28,435 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 13 [2019-12-26 20:46:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:28,436 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-26 20:46:28,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-26 20:46:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:28,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:28,436 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:28,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:28,637 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-26 20:46:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:28,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501060634] [2019-12-26 20:46:28,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501060634] [2019-12-26 20:46:28,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62045792] [2019-12-26 20:46:28,729 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 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 [2019-12-26 20:46:28,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:28,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:28,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:28,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:28,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:28,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903876941] [2019-12-26 20:46:28,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:28,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:28,849 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 16 states. [2019-12-26 20:46:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:29,143 INFO L93 Difference]: Finished difference Result 199 states and 449 transitions. [2019-12-26 20:46:29,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:29,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:29,145 INFO L225 Difference]: With dead ends: 199 [2019-12-26 20:46:29,146 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:46:29,146 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 [2019-12-26 20:46:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:46:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2019-12-26 20:46:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:46:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-26 20:46:29,150 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-26 20:46:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:29,150 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-26 20:46:29,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-26 20:46:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:29,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:29,151 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:29,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,354 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-26 20:46:29,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:29,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844402606] [2019-12-26 20:46:29,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844402606] [2019-12-26 20:46:29,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646030984] [2019-12-26 20:46:29,432 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 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 [2019-12-26 20:46:29,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:29,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:29,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:29,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:29,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702416029] [2019-12-26 20:46:29,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:29,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:29,573 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-26 20:46:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:29,874 INFO L93 Difference]: Finished difference Result 211 states and 484 transitions. [2019-12-26 20:46:29,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:29,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:29,876 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:46:29,876 INFO L226 Difference]: Without dead ends: 210 [2019-12-26 20:46:29,877 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 [2019-12-26 20:46:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-26 20:46:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2019-12-26 20:46:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:46:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-26 20:46:29,881 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-26 20:46:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:29,881 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-26 20:46:29,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-26 20:46:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:29,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:29,881 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:30,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:30,082 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-26 20:46:30,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:30,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126354662] [2019-12-26 20:46:30,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126354662] [2019-12-26 20:46:30,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876738923] [2019-12-26 20:46:30,157 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 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 [2019-12-26 20:46:30,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:30,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:30,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:30,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:30,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:30,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184291103] [2019-12-26 20:46:30,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:30,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:30,311 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-26 20:46:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:30,640 INFO L93 Difference]: Finished difference Result 219 states and 500 transitions. [2019-12-26 20:46:30,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:30,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:30,643 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:46:30,643 INFO L226 Difference]: Without dead ends: 218 [2019-12-26 20:46:30,644 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 [2019-12-26 20:46:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-26 20:46:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2019-12-26 20:46:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:46:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-26 20:46:30,649 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-26 20:46:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:30,649 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-26 20:46:30,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-26 20:46:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:30,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:30,650 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:30,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:30,853 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-26 20:46:30,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:30,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659539032] [2019-12-26 20:46:30,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659539032] [2019-12-26 20:46:30,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140278113] [2019-12-26 20:46:30,970 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 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 [2019-12-26 20:46:31,041 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:31,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:31,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:31,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:31,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:31,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:31,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300860828] [2019-12-26 20:46:31,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:31,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:31,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:31,164 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-26 20:46:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:31,475 INFO L93 Difference]: Finished difference Result 210 states and 476 transitions. [2019-12-26 20:46:31,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:31,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:31,477 INFO L225 Difference]: With dead ends: 210 [2019-12-26 20:46:31,477 INFO L226 Difference]: Without dead ends: 203 [2019-12-26 20:46:31,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-26 20:46:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2019-12-26 20:46:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2019-12-26 20:46:31,481 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 13 [2019-12-26 20:46:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:31,481 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2019-12-26 20:46:31,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2019-12-26 20:46:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:31,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:31,482 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:31,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:31,682 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-26 20:46:31,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:31,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487629252] [2019-12-26 20:46:31,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:31,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487629252] [2019-12-26 20:46:31,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590427404] [2019-12-26 20:46:31,764 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 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 [2019-12-26 20:46:31,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:46:31,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:31,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:31,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:31,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:31,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:31,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722540535] [2019-12-26 20:46:31,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:31,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:31,891 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand 16 states. [2019-12-26 20:46:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,294 INFO L93 Difference]: Finished difference Result 206 states and 464 transitions. [2019-12-26 20:46:32,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:32,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,295 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:46:32,295 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:46:32,296 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 [2019-12-26 20:46:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:46:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2019-12-26 20:46:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-26 20:46:32,301 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-26 20:46:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,301 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-26 20:46:32,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-26 20:46:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,302 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:32,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:32,506 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:32,506 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-26 20:46:32,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:32,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212192072] [2019-12-26 20:46:32,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212192072] [2019-12-26 20:46:32,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875458151] [2019-12-26 20:46:32,587 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 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 [2019-12-26 20:46:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:32,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:32,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:32,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:32,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282425127] [2019-12-26 20:46:32,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:32,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:32,734 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-26 20:46:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:33,032 INFO L93 Difference]: Finished difference Result 173 states and 386 transitions. [2019-12-26 20:46:33,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:33,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:33,035 INFO L225 Difference]: With dead ends: 173 [2019-12-26 20:46:33,035 INFO L226 Difference]: Without dead ends: 172 [2019-12-26 20:46:33,035 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 [2019-12-26 20:46:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-26 20:46:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2019-12-26 20:46:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-26 20:46:33,039 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-26 20:46:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:33,039 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-26 20:46:33,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-26 20:46:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:33,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:33,040 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:33,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:33,243 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-26 20:46:33,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:33,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459898248] [2019-12-26 20:46:33,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459898248] [2019-12-26 20:46:33,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763324069] [2019-12-26 20:46:33,313 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 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 [2019-12-26 20:46:33,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:33,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:33,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:33,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:33,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:33,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869021845] [2019-12-26 20:46:33,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:33,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:33,444 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-26 20:46:33,777 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-26 20:46:34,404 WARN L192 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:46:35,470 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-26 20:46:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:35,551 INFO L93 Difference]: Finished difference Result 189 states and 417 transitions. [2019-12-26 20:46:35,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:35,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:35,553 INFO L225 Difference]: With dead ends: 189 [2019-12-26 20:46:35,553 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:35,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2019-12-26 20:46:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:46:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-26 20:46:35,557 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-26 20:46:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:35,557 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-26 20:46:35,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-26 20:46:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:35,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:35,558 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:35,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:35,761 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-26 20:46:35,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:35,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886503061] [2019-12-26 20:46:35,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:35,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886503061] [2019-12-26 20:46:35,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374369199] [2019-12-26 20:46:35,839 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 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 [2019-12-26 20:46:35,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:35,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:35,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:35,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:35,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:35,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:35,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094120412] [2019-12-26 20:46:35,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:35,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:35,979 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 16 states. [2019-12-26 20:46:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:36,280 INFO L93 Difference]: Finished difference Result 182 states and 406 transitions. [2019-12-26 20:46:36,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:36,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:36,282 INFO L225 Difference]: With dead ends: 182 [2019-12-26 20:46:36,282 INFO L226 Difference]: Without dead ends: 181 [2019-12-26 20:46:36,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-26 20:46:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-26 20:46:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-26 20:46:36,285 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-26 20:46:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:36,286 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-26 20:46:36,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-26 20:46:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:36,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:36,286 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:36,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,487 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-26 20:46:36,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:36,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639416014] [2019-12-26 20:46:36,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:36,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639416014] [2019-12-26 20:46:36,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46337126] [2019-12-26 20:46:36,561 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 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 [2019-12-26 20:46:36,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:36,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:36,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:36,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:36,887 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:36,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:36,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:36,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245088395] [2019-12-26 20:46:36,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:36,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:36,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:36,889 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-26 20:46:38,059 WARN L192 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:38,519 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-26 20:46:38,926 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-12-26 20:46:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:39,072 INFO L93 Difference]: Finished difference Result 199 states and 439 transitions. [2019-12-26 20:46:39,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:39,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:39,074 INFO L225 Difference]: With dead ends: 199 [2019-12-26 20:46:39,074 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:46:39,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:46:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2019-12-26 20:46:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:46:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-26 20:46:39,078 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-26 20:46:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:39,078 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-26 20:46:39,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-26 20:46:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:39,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:39,079 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,280 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-26 20:46:39,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:39,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367868815] [2019-12-26 20:46:39,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367868815] [2019-12-26 20:46:39,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174143835] [2019-12-26 20:46:39,356 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 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 [2019-12-26 20:46:39,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:39,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:39,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:39,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:39,888 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_269 Int)) (and (<= (div (+ (* v_~i~0_269 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ v_~i~0_269 c_~i~0 1)) (<= c_~i~0 (+ (* 2 v_~i~0_269) 1)))) is different from true [2019-12-26 20:46:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:39,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:39,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252780832] [2019-12-26 20:46:39,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:39,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=147, Unknown=1, NotChecked=26, Total=240 [2019-12-26 20:46:39,896 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-26 20:46:40,279 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2019-12-26 20:46:41,663 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-26 20:46:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:43,917 INFO L93 Difference]: Finished difference Result 212 states and 473 transitions. [2019-12-26 20:46:43,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:43,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:43,919 INFO L225 Difference]: With dead ends: 212 [2019-12-26 20:46:43,919 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:46:43,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=4, NotChecked=48, Total=702 [2019-12-26 20:46:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:46:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2019-12-26 20:46:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:46:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-26 20:46:43,923 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-26 20:46:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:43,923 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-26 20:46:43,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-26 20:46:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:43,924 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:43,924 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:44,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:44,124 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-26 20:46:44,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:44,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143554141] [2019-12-26 20:46:44,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:44,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143554141] [2019-12-26 20:46:44,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105528438] [2019-12-26 20:46:44,198 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 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 [2019-12-26 20:46:44,258 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:44,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:44,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:44,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:45,083 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:45,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:45,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:45,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861742717] [2019-12-26 20:46:45,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:45,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:45,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:45,085 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-26 20:46:45,539 WARN L192 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-26 20:46:45,992 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:46,411 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-26 20:46:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:47,002 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2019-12-26 20:46:47,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:47,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:47,005 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:46:47,005 INFO L226 Difference]: Without dead ends: 200 [2019-12-26 20:46:47,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=275, Invalid=536, Unknown=1, NotChecked=0, Total=812 [2019-12-26 20:46:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-26 20:46:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-26 20:46:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:46:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-26 20:46:47,009 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-26 20:46:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:47,009 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-26 20:46:47,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-26 20:46:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:47,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:47,009 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:47,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:47,210 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-26 20:46:47,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:47,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708009779] [2019-12-26 20:46:47,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:47,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708009779] [2019-12-26 20:46:47,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224048349] [2019-12-26 20:46:47,282 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 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 [2019-12-26 20:46:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:47,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:47,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:47,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:47,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:47,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361896645] [2019-12-26 20:46:47,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:47,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:47,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:47,441 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-26 20:46:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:47,988 INFO L93 Difference]: Finished difference Result 187 states and 415 transitions. [2019-12-26 20:46:47,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:47,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:47,990 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:47,990 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:46:47,991 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 [2019-12-26 20:46:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:46:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-26 20:46:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-26 20:46:47,994 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-26 20:46:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:47,995 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-26 20:46:47,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-26 20:46:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:47,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:47,995 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:48,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:48,199 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-26 20:46:48,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:48,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359737034] [2019-12-26 20:46:48,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:48,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359737034] [2019-12-26 20:46:48,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372315140] [2019-12-26 20:46:48,280 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 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 [2019-12-26 20:46:48,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:48,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:48,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:48,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:50,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:50,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:50,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408006825] [2019-12-26 20:46:50,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:50,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:50,553 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-26 20:46:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:51,211 INFO L93 Difference]: Finished difference Result 207 states and 458 transitions. [2019-12-26 20:46:51,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:51,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:51,213 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:46:51,213 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:46:51,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:46:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2019-12-26 20:46:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:46:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-26 20:46:51,217 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-26 20:46:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:51,217 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-26 20:46:51,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-26 20:46:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:51,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:51,218 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:51,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:51,418 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-26 20:46:51,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:51,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869418152] [2019-12-26 20:46:51,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:51,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869418152] [2019-12-26 20:46:51,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477290373] [2019-12-26 20:46:51,497 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 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 [2019-12-26 20:46:51,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:51,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:51,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:51,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:51,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:51,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:51,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197407134] [2019-12-26 20:46:51,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:51,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:51,668 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-26 20:46:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:52,213 INFO L93 Difference]: Finished difference Result 229 states and 508 transitions. [2019-12-26 20:46:52,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:52,213 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:52,214 INFO L225 Difference]: With dead ends: 229 [2019-12-26 20:46:52,214 INFO L226 Difference]: Without dead ends: 227 [2019-12-26 20:46:52,214 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 [2019-12-26 20:46:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-26 20:46:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2019-12-26 20:46:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:46:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-26 20:46:52,217 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 13 [2019-12-26 20:46:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:52,218 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-26 20:46:52,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-26 20:46:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:52,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:52,218 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:52,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:52,420 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-26 20:46:52,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:52,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712931721] [2019-12-26 20:46:52,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:52,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712931721] [2019-12-26 20:46:52,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389517554] [2019-12-26 20:46:52,502 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 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 [2019-12-26 20:46:52,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:52,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:52,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:52,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:52,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:52,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:52,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879938127] [2019-12-26 20:46:52,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:52,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:52,687 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-26 20:46:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:53,672 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-26 20:46:53,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:53,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:53,674 INFO L225 Difference]: With dead ends: 214 [2019-12-26 20:46:53,675 INFO L226 Difference]: Without dead ends: 212 [2019-12-26 20:46:53,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-26 20:46:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 141. [2019-12-26 20:46:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-26 20:46:53,678 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-26 20:46:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:53,678 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-26 20:46:53,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-26 20:46:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:53,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:53,679 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:53,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:53,880 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-26 20:46:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:53,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539668239] [2019-12-26 20:46:53,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:53,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539668239] [2019-12-26 20:46:53,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826198838] [2019-12-26 20:46:53,968 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 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 [2019-12-26 20:46:54,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:54,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:54,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:54,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:54,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:54,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:54,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128793846] [2019-12-26 20:46:54,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:54,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:54,143 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-26 20:46:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:54,639 INFO L93 Difference]: Finished difference Result 224 states and 495 transitions. [2019-12-26 20:46:54,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:54,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:54,641 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:46:54,641 INFO L226 Difference]: Without dead ends: 222 [2019-12-26 20:46:54,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-26 20:46:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2019-12-26 20:46:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:46:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-26 20:46:54,645 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-26 20:46:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:54,645 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-26 20:46:54,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-26 20:46:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:54,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:54,646 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:54,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:54,847 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-26 20:46:54,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:54,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361519618] [2019-12-26 20:46:54,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:54,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361519618] [2019-12-26 20:46:54,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911556294] [2019-12-26 20:46:54,924 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 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 [2019-12-26 20:46:54,966 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:54,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:54,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:54,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:55,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:55,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261299494] [2019-12-26 20:46:55,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:55,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:55,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:55,052 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-26 20:46:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:55,371 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-26 20:46:55,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:55,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:55,373 INFO L225 Difference]: With dead ends: 184 [2019-12-26 20:46:55,373 INFO L226 Difference]: Without dead ends: 183 [2019-12-26 20:46:55,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-26 20:46:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2019-12-26 20:46:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-26 20:46:55,377 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-26 20:46:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:55,378 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-26 20:46:55,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-26 20:46:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:55,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:55,378 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:55,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:55,582 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-26 20:46:55,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:55,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163080738] [2019-12-26 20:46:55,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163080738] [2019-12-26 20:46:55,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018304753] [2019-12-26 20:46:55,651 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 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 [2019-12-26 20:46:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:55,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:55,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:55,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928503803] [2019-12-26 20:46:55,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:55,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:55,794 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-26 20:46:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:56,195 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2019-12-26 20:46:56,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:56,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:56,197 INFO L225 Difference]: With dead ends: 216 [2019-12-26 20:46:56,197 INFO L226 Difference]: Without dead ends: 215 [2019-12-26 20:46:56,198 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 [2019-12-26 20:46:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-26 20:46:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2019-12-26 20:46:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:46:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-26 20:46:56,201 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-26 20:46:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:56,201 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-26 20:46:56,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-26 20:46:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:56,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:56,202 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:56,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:56,405 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:56,406 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-26 20:46:56,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:56,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85556082] [2019-12-26 20:46:56,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:56,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85556082] [2019-12-26 20:46:56,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230894400] [2019-12-26 20:46:56,495 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 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 [2019-12-26 20:46:56,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:56,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:56,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:56,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:56,786 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-26 20:46:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:56,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:56,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:56,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045876266] [2019-12-26 20:46:56,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:56,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:56,788 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-26 20:46:57,049 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-26 20:46:57,458 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-26 20:46:57,776 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-26 20:46:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:57,800 INFO L93 Difference]: Finished difference Result 222 states and 500 transitions. [2019-12-26 20:46:57,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:57,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:57,803 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:46:57,803 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:46:57,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:46:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2019-12-26 20:46:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-26 20:46:57,807 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-26 20:46:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:57,808 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-26 20:46:57,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-26 20:46:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:57,808 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:57,808 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:58,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:58,010 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-26 20:46:58,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:58,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687523973] [2019-12-26 20:46:58,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:58,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687523973] [2019-12-26 20:46:58,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259108783] [2019-12-26 20:46:58,100 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 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 [2019-12-26 20:46:58,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:46:58,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:58,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:58,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:58,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:58,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:58,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77848721] [2019-12-26 20:46:58,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:58,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:58,281 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-26 20:46:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:58,699 INFO L93 Difference]: Finished difference Result 226 states and 511 transitions. [2019-12-26 20:46:58,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:46:58,700 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:58,701 INFO L225 Difference]: With dead ends: 226 [2019-12-26 20:46:58,701 INFO L226 Difference]: Without dead ends: 224 [2019-12-26 20:46:58,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-26 20:46:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2019-12-26 20:46:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:46:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-26 20:46:58,705 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-26 20:46:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:58,705 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-26 20:46:58,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-26 20:46:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:58,706 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:58,706 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:58,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:58,909 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-26 20:46:58,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:58,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523656725] [2019-12-26 20:46:58,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:58,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523656725] [2019-12-26 20:46:58,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296018937] [2019-12-26 20:46:58,982 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 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 [2019-12-26 20:46:59,022 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:59,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:59,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:59,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:59,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:59,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170726903] [2019-12-26 20:46:59,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:59,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:59,100 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-26 20:46:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:59,453 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-26 20:46:59,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:59,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:59,455 INFO L225 Difference]: With dead ends: 229 [2019-12-26 20:46:59,456 INFO L226 Difference]: Without dead ends: 227 [2019-12-26 20:46:59,456 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 [2019-12-26 20:46:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-26 20:46:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 145. [2019-12-26 20:46:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-26 20:46:59,467 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-26 20:46:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:59,467 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-26 20:46:59,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-26 20:46:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:59,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:59,469 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:59,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:59,672 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-26 20:46:59,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:59,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94200979] [2019-12-26 20:46:59,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94200979] [2019-12-26 20:46:59,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162832026] [2019-12-26 20:46:59,739 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 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 [2019-12-26 20:46:59,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:59,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:59,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:59,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:59,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:59,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499419281] [2019-12-26 20:46:59,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:59,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:59,920 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-26 20:47:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:00,227 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2019-12-26 20:47:00,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:47:00,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:00,230 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:47:00,230 INFO L226 Difference]: Without dead ends: 218 [2019-12-26 20:47:00,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:47:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-26 20:47:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2019-12-26 20:47:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-26 20:47:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2019-12-26 20:47:00,235 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 13 [2019-12-26 20:47:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:00,235 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2019-12-26 20:47:00,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2019-12-26 20:47:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:00,236 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:00,236 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:00,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:00,437 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-26 20:47:00,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:00,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891146259] [2019-12-26 20:47:00,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:00,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891146259] [2019-12-26 20:47:00,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621879307] [2019-12-26 20:47:00,507 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 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 [2019-12-26 20:47:00,549 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:00,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:00,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:00,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:00,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:00,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:00,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005817984] [2019-12-26 20:47:00,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:00,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:00,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:00,652 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand 16 states. [2019-12-26 20:47:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:01,047 INFO L93 Difference]: Finished difference Result 222 states and 507 transitions. [2019-12-26 20:47:01,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:01,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:01,048 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:47:01,049 INFO L226 Difference]: Without dead ends: 220 [2019-12-26 20:47:01,049 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 [2019-12-26 20:47:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-26 20:47:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2019-12-26 20:47:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:47:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-26 20:47:01,053 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-26 20:47:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:01,053 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-26 20:47:01,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-26 20:47:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:01,054 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:01,054 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:01,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:01,255 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:01,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-26 20:47:01,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:01,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548514337] [2019-12-26 20:47:01,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:01,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548514337] [2019-12-26 20:47:01,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534532294] [2019-12-26 20:47:01,326 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 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 [2019-12-26 20:47:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:01,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:01,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:01,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:01,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:01,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739773902] [2019-12-26 20:47:01,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:01,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:01,731 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-26 20:47:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:02,254 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-26 20:47:02,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:02,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:02,256 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:47:02,256 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:47:02,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:47:02,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2019-12-26 20:47:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:47:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-26 20:47:02,261 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-26 20:47:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:02,261 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-26 20:47:02,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-26 20:47:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:02,261 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:02,261 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:02,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:02,462 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-26 20:47:02,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:02,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592079684] [2019-12-26 20:47:02,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:02,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592079684] [2019-12-26 20:47:02,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044641119] [2019-12-26 20:47:02,536 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 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 [2019-12-26 20:47:02,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:02,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:02,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:02,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:03,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:03,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:03,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783537887] [2019-12-26 20:47:03,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:03,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:03,032 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-26 20:47:03,317 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-12-26 20:47:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:03,768 INFO L93 Difference]: Finished difference Result 220 states and 495 transitions. [2019-12-26 20:47:03,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:03,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:03,770 INFO L225 Difference]: With dead ends: 220 [2019-12-26 20:47:03,770 INFO L226 Difference]: Without dead ends: 219 [2019-12-26 20:47:03,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-26 20:47:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2019-12-26 20:47:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:47:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-26 20:47:03,774 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-26 20:47:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:03,774 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-26 20:47:03,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-26 20:47:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:03,775 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:03,775 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:03,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:03,975 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-26 20:47:03,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:03,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337882253] [2019-12-26 20:47:03,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337882253] [2019-12-26 20:47:04,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598931325] [2019-12-26 20:47:04,040 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 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 [2019-12-26 20:47:04,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:04,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:04,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:04,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:04,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:04,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044136246] [2019-12-26 20:47:04,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:04,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:04,181 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-26 20:47:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:04,465 INFO L93 Difference]: Finished difference Result 163 states and 366 transitions. [2019-12-26 20:47:04,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:47:04,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:04,466 INFO L225 Difference]: With dead ends: 163 [2019-12-26 20:47:04,467 INFO L226 Difference]: Without dead ends: 153 [2019-12-26 20:47:04,467 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 [2019-12-26 20:47:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-26 20:47:04,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2019-12-26 20:47:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:47:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-26 20:47:04,471 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-26 20:47:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:04,471 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-26 20:47:04,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-26 20:47:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:04,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:04,472 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:04,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:04,676 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-26 20:47:04,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:04,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278996163] [2019-12-26 20:47:04,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278996163] [2019-12-26 20:47:04,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092500670] [2019-12-26 20:47:04,756 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 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 [2019-12-26 20:47:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:47:04,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:47:04,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-26 20:47:04,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469186204] [2019-12-26 20:47:04,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:47:04,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:04,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:47:04,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:04,848 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-26 20:47:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:04,869 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-26 20:47:04,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:47:04,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-26 20:47:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:04,870 INFO L225 Difference]: With dead ends: 151 [2019-12-26 20:47:04,870 INFO L226 Difference]: Without dead ends: 137 [2019-12-26 20:47:04,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-26 20:47:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-26 20:47:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:47:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-26 20:47:04,873 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-26 20:47:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:04,874 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-26 20:47:04,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:47:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-26 20:47:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:04,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:04,875 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:05,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:05,075 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 94 times [2019-12-26 20:47:05,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:05,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144397425] [2019-12-26 20:47:05,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144397425] [2019-12-26 20:47:05,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124138006] [2019-12-26 20:47:05,153 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 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 [2019-12-26 20:47:05,197 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:05,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:05,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:05,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:05,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903184486] [2019-12-26 20:47:05,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:05,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:05,312 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-26 20:47:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:05,523 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-26 20:47:05,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:05,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:05,524 INFO L225 Difference]: With dead ends: 161 [2019-12-26 20:47:05,524 INFO L226 Difference]: Without dead ends: 159 [2019-12-26 20:47:05,524 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 [2019-12-26 20:47:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-26 20:47:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-26 20:47:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:47:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-26 20:47:05,527 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-26 20:47:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:05,527 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-26 20:47:05,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-26 20:47:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:05,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:05,527 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:05,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:05,728 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 95 times [2019-12-26 20:47:05,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:05,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228337778] [2019-12-26 20:47:05,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228337778] [2019-12-26 20:47:05,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028712018] [2019-12-26 20:47:05,820 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 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 [2019-12-26 20:47:05,860 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:05,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:05,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:05,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:05,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:05,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884843899] [2019-12-26 20:47:05,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:05,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:05,965 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-26 20:47:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:06,188 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-26 20:47:06,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:06,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:06,189 INFO L225 Difference]: With dead ends: 169 [2019-12-26 20:47:06,189 INFO L226 Difference]: Without dead ends: 168 [2019-12-26 20:47:06,189 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 [2019-12-26 20:47:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-26 20:47:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-26 20:47:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:47:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-26 20:47:06,191 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-26 20:47:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:06,192 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-26 20:47:06,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-26 20:47:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:06,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:06,192 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:06,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:06,395 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:06,396 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 96 times [2019-12-26 20:47:06,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:06,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266303641] [2019-12-26 20:47:06,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266303641] [2019-12-26 20:47:06,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009088579] [2019-12-26 20:47:06,479 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 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 [2019-12-26 20:47:06,521 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:06,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:06,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:06,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:06,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:06,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395050756] [2019-12-26 20:47:06,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:06,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:06,646 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-26 20:47:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:06,953 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-26 20:47:06,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:47:06,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:06,954 INFO L225 Difference]: With dead ends: 180 [2019-12-26 20:47:06,955 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:47:06,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:47:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:47:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-26 20:47:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:47:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-26 20:47:06,958 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-26 20:47:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:06,958 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-26 20:47:06,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-26 20:47:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:06,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:06,959 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:07,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:07,162 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 97 times [2019-12-26 20:47:07,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:07,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245671421] [2019-12-26 20:47:07,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:07,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245671421] [2019-12-26 20:47:07,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951802119] [2019-12-26 20:47:07,255 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 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 [2019-12-26 20:47:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:07,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:07,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:08,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:08,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:08,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565656287] [2019-12-26 20:47:08,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:08,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:08,152 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-26 20:47:08,449 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:47:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:09,104 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-26 20:47:09,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:47:09,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:09,105 INFO L225 Difference]: With dead ends: 188 [2019-12-26 20:47:09,105 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:47:09,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=223, Invalid=426, Unknown=1, NotChecked=0, Total=650 [2019-12-26 20:47:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:47:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2019-12-26 20:47:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:47:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-26 20:47:09,109 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-26 20:47:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:09,109 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-26 20:47:09,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-26 20:47:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:09,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:09,110 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:09,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:09,313 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 98 times [2019-12-26 20:47:09,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:09,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542079962] [2019-12-26 20:47:09,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:09,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542079962] [2019-12-26 20:47:09,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824296415] [2019-12-26 20:47:09,387 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 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 [2019-12-26 20:47:09,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:09,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:09,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:09,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:09,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:09,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:09,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778031253] [2019-12-26 20:47:09,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:09,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:09,545 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-26 20:47:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:09,744 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-26 20:47:09,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:09,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:09,745 INFO L225 Difference]: With dead ends: 172 [2019-12-26 20:47:09,745 INFO L226 Difference]: Without dead ends: 171 [2019-12-26 20:47:09,746 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 [2019-12-26 20:47:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-26 20:47:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-26 20:47:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:47:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-26 20:47:09,749 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-26 20:47:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:09,749 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-26 20:47:09,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-26 20:47:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:09,750 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:09,750 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:09,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:09,951 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 99 times [2019-12-26 20:47:09,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:09,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104273914] [2019-12-26 20:47:09,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:10,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104273914] [2019-12-26 20:47:10,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919388772] [2019-12-26 20:47:10,028 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 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 [2019-12-26 20:47:10,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:10,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:10,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:10,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:10,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:10,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:10,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473185302] [2019-12-26 20:47:10,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:10,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:10,211 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-26 20:47:10,578 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-26 20:47:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:10,660 INFO L93 Difference]: Finished difference Result 201 states and 432 transitions. [2019-12-26 20:47:10,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:47:10,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:10,661 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:47:10,661 INFO L226 Difference]: Without dead ends: 200 [2019-12-26 20:47:10,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:47:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-26 20:47:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2019-12-26 20:47:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:47:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-26 20:47:10,665 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-26 20:47:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:10,665 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-26 20:47:10,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-26 20:47:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:10,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:10,666 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:10,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:10,866 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 100 times [2019-12-26 20:47:10,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:10,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377559531] [2019-12-26 20:47:10,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:10,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377559531] [2019-12-26 20:47:10,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940205242] [2019-12-26 20:47:10,946 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 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 [2019-12-26 20:47:10,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:10,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:10,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:10,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:11,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:11,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:11,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230817712] [2019-12-26 20:47:11,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:11,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:11,616 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-26 20:47:12,689 WARN L192 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:47:13,439 WARN L192 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:47:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:13,464 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2019-12-26 20:47:13,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:13,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:13,465 INFO L225 Difference]: With dead ends: 212 [2019-12-26 20:47:13,466 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:47:13,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:47:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:47:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 145. [2019-12-26 20:47:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:47:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-26 20:47:13,470 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-26 20:47:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:13,470 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-26 20:47:13,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-26 20:47:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:13,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:13,471 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:13,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:13,674 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 101 times [2019-12-26 20:47:13,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:13,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440993232] [2019-12-26 20:47:13,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:13,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440993232] [2019-12-26 20:47:13,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938839747] [2019-12-26 20:47:13,765 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 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 [2019-12-26 20:47:13,812 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:47:13,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:13,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:13,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:14,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:14,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:14,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058924984] [2019-12-26 20:47:14,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:14,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:14,650 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 18 states. [2019-12-26 20:47:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:15,997 INFO L93 Difference]: Finished difference Result 197 states and 424 transitions. [2019-12-26 20:47:15,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:15,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:15,999 INFO L225 Difference]: With dead ends: 197 [2019-12-26 20:47:15,999 INFO L226 Difference]: Without dead ends: 193 [2019-12-26 20:47:15,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:47:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-26 20:47:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-26 20:47:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:47:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-26 20:47:16,002 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-26 20:47:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:16,002 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-26 20:47:16,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-26 20:47:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:16,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:16,003 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:16,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:16,206 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 102 times [2019-12-26 20:47:16,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:16,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006526690] [2019-12-26 20:47:16,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:16,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006526690] [2019-12-26 20:47:16,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284539371] [2019-12-26 20:47:16,289 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 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 [2019-12-26 20:47:16,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:16,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:16,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:16,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:17,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:17,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:17,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320553892] [2019-12-26 20:47:17,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:17,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:17,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=206, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:47:17,961 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-26 20:47:18,470 WARN L192 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-12-26 20:47:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:20,577 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2019-12-26 20:47:20,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:20,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:20,578 INFO L225 Difference]: With dead ends: 205 [2019-12-26 20:47:20,578 INFO L226 Difference]: Without dead ends: 204 [2019-12-26 20:47:20,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=263, Invalid=488, Unknown=5, NotChecked=0, Total=756 [2019-12-26 20:47:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-26 20:47:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2019-12-26 20:47:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-26 20:47:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-26 20:47:20,583 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-26 20:47:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:20,583 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-26 20:47:20,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-26 20:47:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:20,583 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:20,584 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:20,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:20,784 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 103 times [2019-12-26 20:47:20,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:20,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553208707] [2019-12-26 20:47:20,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:20,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553208707] [2019-12-26 20:47:20,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890562842] [2019-12-26 20:47:20,869 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 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 [2019-12-26 20:47:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:20,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:20,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:21,912 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:47:22,368 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_322 Int)) (and (<= c_~i~0 (+ (* 3 v_~j~0_322) 2)) (<= c_~j~0 (+ c_~i~0 (* 2 v_~j~0_322) 1)) (<= (div (+ (* v_~j~0_322 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-26 20:47:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:22,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:22,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272915308] [2019-12-26 20:47:22,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:22,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:22,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=177, Unknown=2, NotChecked=30, Total=306 [2019-12-26 20:47:22,370 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 18 states. [2019-12-26 20:47:23,077 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-12-26 20:47:24,968 WARN L192 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-26 20:47:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:26,675 INFO L93 Difference]: Finished difference Result 227 states and 488 transitions. [2019-12-26 20:47:26,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:47:26,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:26,676 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:47:26,676 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:47:26,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=303, Invalid=506, Unknown=7, NotChecked=54, Total=870 [2019-12-26 20:47:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:47:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-26 20:47:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:47:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-26 20:47:26,680 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-26 20:47:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:26,680 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-26 20:47:26,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-26 20:47:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:26,681 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:26,681 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:26,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:26,884 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 104 times [2019-12-26 20:47:26,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:26,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598114265] [2019-12-26 20:47:26,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:26,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598114265] [2019-12-26 20:47:26,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845052888] [2019-12-26 20:47:26,970 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 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 [2019-12-26 20:47:27,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:27,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:27,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:27,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:28,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:28,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:28,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940487421] [2019-12-26 20:47:28,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:28,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:28,879 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 18 states. [2019-12-26 20:47:30,984 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:47:33,612 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-26 20:47:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:33,692 INFO L93 Difference]: Finished difference Result 192 states and 415 transitions. [2019-12-26 20:47:33,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:47:33,692 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:33,693 INFO L225 Difference]: With dead ends: 192 [2019-12-26 20:47:33,693 INFO L226 Difference]: Without dead ends: 190 [2019-12-26 20:47:33,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=247, Invalid=454, Unknown=1, NotChecked=0, Total=702 [2019-12-26 20:47:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-26 20:47:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2019-12-26 20:47:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:47:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-26 20:47:33,697 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-26 20:47:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:33,697 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-26 20:47:33,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-26 20:47:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:33,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:33,698 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:33,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:33,899 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 105 times [2019-12-26 20:47:33,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:33,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669515872] [2019-12-26 20:47:33,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:33,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669515872] [2019-12-26 20:47:33,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027228044] [2019-12-26 20:47:33,982 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 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 [2019-12-26 20:47:34,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:34,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:34,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:34,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:34,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:34,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:34,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765626531] [2019-12-26 20:47:34,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:34,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:34,131 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-26 20:47:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:34,329 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-26 20:47:34,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:34,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:34,330 INFO L225 Difference]: With dead ends: 170 [2019-12-26 20:47:34,330 INFO L226 Difference]: Without dead ends: 162 [2019-12-26 20:47:34,330 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 [2019-12-26 20:47:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-26 20:47:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-26 20:47:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-26 20:47:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-26 20:47:34,333 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-26 20:47:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:34,333 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-26 20:47:34,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-26 20:47:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:34,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:34,334 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:34,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:34,535 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 106 times [2019-12-26 20:47:34,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:34,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268962823] [2019-12-26 20:47:34,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:34,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268962823] [2019-12-26 20:47:34,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231934672] [2019-12-26 20:47:34,623 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 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 [2019-12-26 20:47:34,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:34,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:34,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:34,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:34,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:34,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:34,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445544167] [2019-12-26 20:47:34,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:34,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:34,804 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-26 20:47:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:35,155 INFO L93 Difference]: Finished difference Result 197 states and 428 transitions. [2019-12-26 20:47:35,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:47:35,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:35,156 INFO L225 Difference]: With dead ends: 197 [2019-12-26 20:47:35,156 INFO L226 Difference]: Without dead ends: 196 [2019-12-26 20:47:35,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:47:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-26 20:47:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2019-12-26 20:47:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-26 20:47:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-26 20:47:35,160 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-26 20:47:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:35,160 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-26 20:47:35,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-26 20:47:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:35,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:35,161 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:35,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:35,361 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 107 times [2019-12-26 20:47:35,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:35,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139237276] [2019-12-26 20:47:35,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:35,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139237276] [2019-12-26 20:47:35,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276579232] [2019-12-26 20:47:35,443 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 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 [2019-12-26 20:47:35,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:35,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:35,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:35,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:35,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:35,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:35,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423401805] [2019-12-26 20:47:35,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:35,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:35,626 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-26 20:47:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:36,108 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2019-12-26 20:47:36,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:47:36,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:36,109 INFO L225 Difference]: With dead ends: 232 [2019-12-26 20:47:36,109 INFO L226 Difference]: Without dead ends: 231 [2019-12-26 20:47:36,110 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 [2019-12-26 20:47:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-26 20:47:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2019-12-26 20:47:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-26 20:47:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-26 20:47:36,113 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-26 20:47:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:36,113 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-26 20:47:36,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-26 20:47:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:36,114 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:36,114 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:36,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:36,317 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 108 times [2019-12-26 20:47:36,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:36,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196566271] [2019-12-26 20:47:36,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:36,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196566271] [2019-12-26 20:47:36,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714884752] [2019-12-26 20:47:36,417 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 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 [2019-12-26 20:47:36,464 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:47:36,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:36,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:36,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:36,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:36,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:36,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318683305] [2019-12-26 20:47:36,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:36,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:36,629 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 18 states. [2019-12-26 20:47:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:37,132 INFO L93 Difference]: Finished difference Result 212 states and 456 transitions. [2019-12-26 20:47:37,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:37,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:37,134 INFO L225 Difference]: With dead ends: 212 [2019-12-26 20:47:37,134 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:47:37,134 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 [2019-12-26 20:47:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:47:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2019-12-26 20:47:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-26 20:47:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-26 20:47:37,137 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-26 20:47:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:37,137 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-26 20:47:37,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-26 20:47:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:37,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:37,138 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:37,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:37,339 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 109 times [2019-12-26 20:47:37,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:37,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271752056] [2019-12-26 20:47:37,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:37,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271752056] [2019-12-26 20:47:37,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189076169] [2019-12-26 20:47:37,424 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 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 [2019-12-26 20:47:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:37,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:37,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:37,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:37,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:37,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806140849] [2019-12-26 20:47:37,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:37,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:37,616 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-26 20:47:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:38,570 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-26 20:47:38,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:38,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:38,571 INFO L225 Difference]: With dead ends: 220 [2019-12-26 20:47:38,571 INFO L226 Difference]: Without dead ends: 219 [2019-12-26 20:47:38,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:47:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-26 20:47:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2019-12-26 20:47:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-26 20:47:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-26 20:47:38,575 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-26 20:47:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:38,576 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-26 20:47:38,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-26 20:47:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:38,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:38,576 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:38,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:38,777 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 110 times [2019-12-26 20:47:38,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:38,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630207143] [2019-12-26 20:47:38,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:38,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630207143] [2019-12-26 20:47:38,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966143269] [2019-12-26 20:47:38,895 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 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 [2019-12-26 20:47:38,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:38,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:38,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:38,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:39,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:39,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:39,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300351554] [2019-12-26 20:47:39,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:39,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:39,130 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 18 states. [2019-12-26 20:47:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:40,153 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2019-12-26 20:47:40,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:40,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:40,155 INFO L225 Difference]: With dead ends: 252 [2019-12-26 20:47:40,155 INFO L226 Difference]: Without dead ends: 245 [2019-12-26 20:47:40,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:47:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-26 20:47:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2019-12-26 20:47:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:47:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-26 20:47:40,158 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-26 20:47:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:40,158 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-26 20:47:40,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-26 20:47:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:40,158 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:40,159 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:40,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:40,359 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 111 times [2019-12-26 20:47:40,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:40,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360841833] [2019-12-26 20:47:40,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:40,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360841833] [2019-12-26 20:47:40,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857347605] [2019-12-26 20:47:40,439 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 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 [2019-12-26 20:47:40,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:47:40,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:40,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:40,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:40,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:40,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:40,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438206535] [2019-12-26 20:47:40,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:40,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:40,668 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-26 20:47:42,888 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-26 20:47:43,286 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-26 20:47:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:44,758 INFO L93 Difference]: Finished difference Result 247 states and 530 transitions. [2019-12-26 20:47:44,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:44,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:44,760 INFO L225 Difference]: With dead ends: 247 [2019-12-26 20:47:44,760 INFO L226 Difference]: Without dead ends: 244 [2019-12-26 20:47:44,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=359, Invalid=697, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:47:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-26 20:47:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 152. [2019-12-26 20:47:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:47:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-26 20:47:44,764 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-26 20:47:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:44,764 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-26 20:47:44,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-26 20:47:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:44,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:44,764 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:44,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:44,965 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 112 times [2019-12-26 20:47:44,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:44,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820273914] [2019-12-26 20:47:44,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:45,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820273914] [2019-12-26 20:47:45,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089654715] [2019-12-26 20:47:45,049 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 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 [2019-12-26 20:47:45,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:45,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:45,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:45,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:45,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:45,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:45,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795915486] [2019-12-26 20:47:45,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:45,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:45,232 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-26 20:47:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:46,328 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-26 20:47:46,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:47:46,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:46,329 INFO L225 Difference]: With dead ends: 208 [2019-12-26 20:47:46,330 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:47:46,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:47:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:47:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2019-12-26 20:47:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:47:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-26 20:47:46,334 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-26 20:47:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:46,334 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-26 20:47:46,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-26 20:47:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:46,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:46,335 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:46,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:46,535 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 113 times [2019-12-26 20:47:46,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:46,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37700295] [2019-12-26 20:47:46,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:46,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37700295] [2019-12-26 20:47:46,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177280899] [2019-12-26 20:47:46,620 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 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 [2019-12-26 20:47:46,663 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:46,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:46,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:46,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:48,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:48,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:48,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311072947] [2019-12-26 20:47:48,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:48,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:48,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:48,978 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-26 20:47:52,606 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:47:54,684 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:47:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:56,892 INFO L93 Difference]: Finished difference Result 238 states and 518 transitions. [2019-12-26 20:47:56,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:56,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:56,893 INFO L225 Difference]: With dead ends: 238 [2019-12-26 20:47:56,894 INFO L226 Difference]: Without dead ends: 237 [2019-12-26 20:47:56,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=286, Invalid=525, Unknown=1, NotChecked=0, Total=812 [2019-12-26 20:47:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-26 20:47:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2019-12-26 20:47:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:47:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 348 transitions. [2019-12-26 20:47:56,897 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 348 transitions. Word has length 14 [2019-12-26 20:47:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:56,897 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 348 transitions. [2019-12-26 20:47:56,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 348 transitions. [2019-12-26 20:47:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:56,898 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:56,898 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:57,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:57,101 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 114 times [2019-12-26 20:47:57,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:57,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343240614] [2019-12-26 20:47:57,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:57,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343240614] [2019-12-26 20:47:57,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928461835] [2019-12-26 20:47:57,186 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 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 [2019-12-26 20:47:57,230 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:57,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:57,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:57,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:57,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:57,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:57,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811685117] [2019-12-26 20:47:57,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:57,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:57,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:57,409 INFO L87 Difference]: Start difference. First operand 153 states and 348 transitions. Second operand 18 states. [2019-12-26 20:47:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:58,347 INFO L93 Difference]: Finished difference Result 244 states and 529 transitions. [2019-12-26 20:47:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:58,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:58,349 INFO L225 Difference]: With dead ends: 244 [2019-12-26 20:47:58,349 INFO L226 Difference]: Without dead ends: 243 [2019-12-26 20:47:58,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-26 20:47:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2019-12-26 20:47:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:47:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-26 20:47:58,354 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-26 20:47:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:58,354 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-26 20:47:58,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-26 20:47:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:58,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:58,355 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:58,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:58,556 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 115 times [2019-12-26 20:47:58,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:58,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414044820] [2019-12-26 20:47:58,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:58,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414044820] [2019-12-26 20:47:58,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582613912] [2019-12-26 20:47:58,679 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 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 [2019-12-26 20:47:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:58,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:58,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:59,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:59,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:59,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365008397] [2019-12-26 20:47:59,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:59,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:59,023 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-26 20:47:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:59,999 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2019-12-26 20:47:59,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:00,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:00,001 INFO L225 Difference]: With dead ends: 234 [2019-12-26 20:48:00,001 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:48:00,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:48:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2019-12-26 20:48:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:48:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-26 20:48:00,006 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-26 20:48:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:00,006 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-26 20:48:00,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-26 20:48:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:00,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:00,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:00,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:00,210 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 116 times [2019-12-26 20:48:00,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:00,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961509825] [2019-12-26 20:48:00,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:00,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961509825] [2019-12-26 20:48:00,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797061519] [2019-12-26 20:48:00,291 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 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 [2019-12-26 20:48:00,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:00,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:00,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:00,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:02,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:02,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:02,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18221250] [2019-12-26 20:48:02,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:02,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:02,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:48:02,552 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-26 20:48:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:06,285 INFO L93 Difference]: Finished difference Result 211 states and 458 transitions. [2019-12-26 20:48:06,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:48:06,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:06,286 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:48:06,286 INFO L226 Difference]: Without dead ends: 210 [2019-12-26 20:48:06,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=289, Invalid=580, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:48:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-26 20:48:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2019-12-26 20:48:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-26 20:48:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-26 20:48:06,290 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-26 20:48:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:06,290 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-26 20:48:06,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-26 20:48:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:06,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:06,291 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:06,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:06,492 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 117 times [2019-12-26 20:48:06,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:06,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764987222] [2019-12-26 20:48:06,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:06,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764987222] [2019-12-26 20:48:06,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49818194] [2019-12-26 20:48:06,573 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 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 [2019-12-26 20:48:06,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:48:06,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:06,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:06,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:06,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:06,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183417597] [2019-12-26 20:48:06,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:06,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:06,728 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 18 states. [2019-12-26 20:48:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:07,131 INFO L93 Difference]: Finished difference Result 197 states and 429 transitions. [2019-12-26 20:48:07,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:07,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:07,132 INFO L225 Difference]: With dead ends: 197 [2019-12-26 20:48:07,133 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:48:07,133 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 [2019-12-26 20:48:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:48:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2019-12-26 20:48:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:48:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-26 20:48:07,136 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-26 20:48:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:07,137 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-26 20:48:07,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-26 20:48:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:07,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:07,137 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:07,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:07,338 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 118 times [2019-12-26 20:48:07,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:07,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531439784] [2019-12-26 20:48:07,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:07,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531439784] [2019-12-26 20:48:07,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884175256] [2019-12-26 20:48:07,419 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 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 [2019-12-26 20:48:07,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:07,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:07,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:07,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:07,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:07,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:07,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049893489] [2019-12-26 20:48:07,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:07,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:07,586 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-26 20:48:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:08,004 INFO L93 Difference]: Finished difference Result 212 states and 459 transitions. [2019-12-26 20:48:08,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:08,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:08,005 INFO L225 Difference]: With dead ends: 212 [2019-12-26 20:48:08,005 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:48:08,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:48:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:48:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2019-12-26 20:48:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:48:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-26 20:48:08,009 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-26 20:48:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:08,009 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-26 20:48:08,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-26 20:48:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:08,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:08,010 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:08,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:08,211 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 119 times [2019-12-26 20:48:08,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:08,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253605484] [2019-12-26 20:48:08,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:08,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253605484] [2019-12-26 20:48:08,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026091097] [2019-12-26 20:48:08,302 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 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 [2019-12-26 20:48:08,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:48:08,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:08,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:08,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:08,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:08,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:08,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942999377] [2019-12-26 20:48:08,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:08,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:08,464 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 18 states. [2019-12-26 20:48:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:08,864 INFO L93 Difference]: Finished difference Result 210 states and 457 transitions. [2019-12-26 20:48:08,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:08,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:08,866 INFO L225 Difference]: With dead ends: 210 [2019-12-26 20:48:08,866 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:48:08,867 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 [2019-12-26 20:48:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:48:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2019-12-26 20:48:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:48:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-26 20:48:08,870 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-26 20:48:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:08,870 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-26 20:48:08,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-26 20:48:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:08,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:08,871 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:09,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:09,075 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 120 times [2019-12-26 20:48:09,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:09,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887713145] [2019-12-26 20:48:09,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:09,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887713145] [2019-12-26 20:48:09,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111245863] [2019-12-26 20:48:09,158 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 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 [2019-12-26 20:48:09,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:09,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:09,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:09,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:09,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:09,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:09,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706600431] [2019-12-26 20:48:09,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:09,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:09,317 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-26 20:48:09,972 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:48:10,698 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2019-12-26 20:48:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:11,379 INFO L93 Difference]: Finished difference Result 224 states and 482 transitions. [2019-12-26 20:48:11,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:11,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:11,381 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:48:11,381 INFO L226 Difference]: Without dead ends: 220 [2019-12-26 20:48:11,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:48:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-26 20:48:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-26 20:48:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:48:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-26 20:48:11,385 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-26 20:48:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:11,386 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-26 20:48:11,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-26 20:48:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:11,386 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:11,387 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:11,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:11,587 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 121 times [2019-12-26 20:48:11,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:11,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816242704] [2019-12-26 20:48:11,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:11,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816242704] [2019-12-26 20:48:11,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626385137] [2019-12-26 20:48:11,680 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 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 [2019-12-26 20:48:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:11,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:11,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:14,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:14,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:14,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730592556] [2019-12-26 20:48:14,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:14,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:48:14,096 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-26 20:48:14,606 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-26 20:48:15,546 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2019-12-26 20:48:16,589 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-26 20:48:17,038 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:48:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:17,471 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2019-12-26 20:48:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:17,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:17,472 INFO L225 Difference]: With dead ends: 254 [2019-12-26 20:48:17,472 INFO L226 Difference]: Without dead ends: 252 [2019-12-26 20:48:17,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=287, Invalid=582, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:48:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-26 20:48:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 156. [2019-12-26 20:48:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:48:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-26 20:48:17,476 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-26 20:48:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:17,476 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-26 20:48:17,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-26 20:48:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:17,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:17,477 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:17,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:17,677 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 122 times [2019-12-26 20:48:17,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:17,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463271574] [2019-12-26 20:48:17,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:17,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463271574] [2019-12-26 20:48:17,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040850447] [2019-12-26 20:48:17,763 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 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 [2019-12-26 20:48:17,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:17,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:17,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:17,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:18,388 WARN L192 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:48:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:18,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:18,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:18,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246859214] [2019-12-26 20:48:18,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:18,390 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 18 states. [2019-12-26 20:48:18,963 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2019-12-26 20:48:19,456 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2019-12-26 20:48:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:19,926 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2019-12-26 20:48:19,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:19,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:19,927 INFO L225 Difference]: With dead ends: 237 [2019-12-26 20:48:19,928 INFO L226 Difference]: Without dead ends: 236 [2019-12-26 20:48:19,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=333, Invalid=659, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-26 20:48:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2019-12-26 20:48:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:48:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-26 20:48:19,932 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-26 20:48:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:19,932 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-26 20:48:19,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-26 20:48:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:19,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:19,932 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:20,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:20,133 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 123 times [2019-12-26 20:48:20,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:20,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933302390] [2019-12-26 20:48:20,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:20,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933302390] [2019-12-26 20:48:20,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559315233] [2019-12-26 20:48:20,221 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 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 [2019-12-26 20:48:20,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:48:20,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:20,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:20,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:20,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:20,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:20,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391344446] [2019-12-26 20:48:20,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:20,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:20,427 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-26 20:48:23,858 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-26 20:48:24,354 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_~i~0_424 Int)) (and (<= (div (+ (* v_~i~0_424 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_424 2)) (<= c_~i~0 (+ v_~i~0_424 (* 3 c_~j~0))))) (exists ((v_~i~0_424 Int)) (and (<= c_~i~0 (+ v_~i~0_424 (* 2 c_~j~0))) (<= (div (+ (* v_~i~0_424 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_424 2))))) is different from true [2019-12-26 20:48:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:24,433 INFO L93 Difference]: Finished difference Result 211 states and 457 transitions. [2019-12-26 20:48:24,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:48:24,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:24,434 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:48:24,434 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:48:24,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=4, NotChecked=66, Total=1260 [2019-12-26 20:48:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:48:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2019-12-26 20:48:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-26 20:48:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 357 transitions. [2019-12-26 20:48:24,438 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 357 transitions. Word has length 14 [2019-12-26 20:48:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:24,438 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 357 transitions. [2019-12-26 20:48:24,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 357 transitions. [2019-12-26 20:48:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:24,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:24,438 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:24,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:24,639 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:24,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 124 times [2019-12-26 20:48:24,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:24,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629472974] [2019-12-26 20:48:24,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:24,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629472974] [2019-12-26 20:48:24,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570405264] [2019-12-26 20:48:24,741 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 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 [2019-12-26 20:48:24,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:24,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:24,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:24,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:27,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:27,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:27,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243051351] [2019-12-26 20:48:27,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:27,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:48:27,061 INFO L87 Difference]: Start difference. First operand 157 states and 357 transitions. Second operand 18 states. [2019-12-26 20:48:29,699 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-26 20:48:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:32,955 INFO L93 Difference]: Finished difference Result 244 states and 528 transitions. [2019-12-26 20:48:32,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:32,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:32,956 INFO L225 Difference]: With dead ends: 244 [2019-12-26 20:48:32,957 INFO L226 Difference]: Without dead ends: 243 [2019-12-26 20:48:32,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=328, Invalid=662, Unknown=2, NotChecked=0, Total=992 [2019-12-26 20:48:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-26 20:48:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 156. [2019-12-26 20:48:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:48:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-26 20:48:32,960 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-26 20:48:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:32,961 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-26 20:48:32,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-26 20:48:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:32,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:32,961 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:33,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:33,162 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 125 times [2019-12-26 20:48:33,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:33,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594485916] [2019-12-26 20:48:33,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:33,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594485916] [2019-12-26 20:48:33,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187551835] [2019-12-26 20:48:33,248 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 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 [2019-12-26 20:48:33,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:48:33,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:33,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:33,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:33,794 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_433 Int)) (and (<= (div (+ (* v_~i~0_433 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_433 2)) (<= c_~i~0 (+ v_~i~0_433 c_~j~0)))) is different from true [2019-12-26 20:48:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-26 20:48:33,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:33,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:33,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663887531] [2019-12-26 20:48:33,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:33,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=187, Unknown=1, NotChecked=30, Total=306 [2019-12-26 20:48:33,865 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-26 20:48:34,759 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-26 20:48:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:35,677 INFO L93 Difference]: Finished difference Result 272 states and 590 transitions. [2019-12-26 20:48:35,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:35,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:35,679 INFO L225 Difference]: With dead ends: 272 [2019-12-26 20:48:35,679 INFO L226 Difference]: Without dead ends: 270 [2019-12-26 20:48:35,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=379, Invalid=745, Unknown=2, NotChecked=64, Total=1190 [2019-12-26 20:48:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-26 20:48:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 163. [2019-12-26 20:48:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-26 20:48:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 380 transitions. [2019-12-26 20:48:35,684 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 380 transitions. Word has length 14 [2019-12-26 20:48:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:35,684 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 380 transitions. [2019-12-26 20:48:35,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 380 transitions. [2019-12-26 20:48:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:35,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:35,685 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:35,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:35,888 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 126 times [2019-12-26 20:48:35,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:35,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25924908] [2019-12-26 20:48:35,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:35,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25924908] [2019-12-26 20:48:35,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401290423] [2019-12-26 20:48:35,971 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 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 [2019-12-26 20:48:36,013 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:36,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:36,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:36,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:36,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:36,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:36,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798824572] [2019-12-26 20:48:36,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:36,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:36,187 INFO L87 Difference]: Start difference. First operand 163 states and 380 transitions. Second operand 18 states. [2019-12-26 20:48:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:38,045 INFO L93 Difference]: Finished difference Result 264 states and 575 transitions. [2019-12-26 20:48:38,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:38,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:38,046 INFO L225 Difference]: With dead ends: 264 [2019-12-26 20:48:38,047 INFO L226 Difference]: Without dead ends: 255 [2019-12-26 20:48:38,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:48:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-26 20:48:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2019-12-26 20:48:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-26 20:48:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 370 transitions. [2019-12-26 20:48:38,051 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 370 transitions. Word has length 14 [2019-12-26 20:48:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:38,051 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 370 transitions. [2019-12-26 20:48:38,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 370 transitions. [2019-12-26 20:48:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:38,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:38,052 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:38,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:38,258 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:38,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 127 times [2019-12-26 20:48:38,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:38,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138869043] [2019-12-26 20:48:38,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:38,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138869043] [2019-12-26 20:48:38,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158107541] [2019-12-26 20:48:38,379 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 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 [2019-12-26 20:48:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:38,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:38,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:38,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177589044] [2019-12-26 20:48:38,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:38,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:38,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:38,671 INFO L87 Difference]: Start difference. First operand 161 states and 370 transitions. Second operand 18 states. [2019-12-26 20:48:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:39,383 INFO L93 Difference]: Finished difference Result 254 states and 555 transitions. [2019-12-26 20:48:39,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:39,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:39,384 INFO L225 Difference]: With dead ends: 254 [2019-12-26 20:48:39,384 INFO L226 Difference]: Without dead ends: 252 [2019-12-26 20:48:39,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:48:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-26 20:48:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 163. [2019-12-26 20:48:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-26 20:48:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 377 transitions. [2019-12-26 20:48:39,388 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 377 transitions. Word has length 14 [2019-12-26 20:48:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:39,388 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 377 transitions. [2019-12-26 20:48:39,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 377 transitions. [2019-12-26 20:48:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:39,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:39,389 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:39,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:39,589 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 128 times [2019-12-26 20:48:39,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:39,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465350471] [2019-12-26 20:48:39,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:39,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465350471] [2019-12-26 20:48:39,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494273755] [2019-12-26 20:48:39,684 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 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 [2019-12-26 20:48:39,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:39,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:39,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:39,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:40,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:40,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:40,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663728111] [2019-12-26 20:48:40,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:40,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:40,361 INFO L87 Difference]: Start difference. First operand 163 states and 377 transitions. Second operand 18 states. [2019-12-26 20:48:41,756 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:48:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:43,346 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2019-12-26 20:48:43,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:48:43,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:43,347 INFO L225 Difference]: With dead ends: 260 [2019-12-26 20:48:43,347 INFO L226 Difference]: Without dead ends: 256 [2019-12-26 20:48:43,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=406, Invalid=783, Unknown=1, NotChecked=0, Total=1190 [2019-12-26 20:48:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-26 20:48:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 161. [2019-12-26 20:48:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-26 20:48:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 371 transitions. [2019-12-26 20:48:43,350 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 371 transitions. Word has length 14 [2019-12-26 20:48:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:43,350 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 371 transitions. [2019-12-26 20:48:43,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 371 transitions. [2019-12-26 20:48:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:43,351 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:43,351 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:43,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:43,552 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 129 times [2019-12-26 20:48:43,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:43,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627395450] [2019-12-26 20:48:43,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:43,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627395450] [2019-12-26 20:48:43,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708084753] [2019-12-26 20:48:43,642 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 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 [2019-12-26 20:48:43,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:48:43,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:43,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:43,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:43,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:43,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:43,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743622806] [2019-12-26 20:48:43,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:43,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:43,781 INFO L87 Difference]: Start difference. First operand 161 states and 371 transitions. Second operand 18 states. [2019-12-26 20:48:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:44,145 INFO L93 Difference]: Finished difference Result 201 states and 439 transitions. [2019-12-26 20:48:44,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:44,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:44,147 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:48:44,147 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:48:44,147 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 [2019-12-26 20:48:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:48:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2019-12-26 20:48:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-26 20:48:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 371 transitions. [2019-12-26 20:48:44,151 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 371 transitions. Word has length 14 [2019-12-26 20:48:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:44,151 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 371 transitions. [2019-12-26 20:48:44,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 371 transitions. [2019-12-26 20:48:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:44,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:44,152 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:44,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:44,352 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 130 times [2019-12-26 20:48:44,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:44,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293904005] [2019-12-26 20:48:44,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:44,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293904005] [2019-12-26 20:48:44,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29738147] [2019-12-26 20:48:44,436 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 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 [2019-12-26 20:48:44,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:44,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:44,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:44,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:44,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:44,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493237684] [2019-12-26 20:48:44,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:44,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:44,593 INFO L87 Difference]: Start difference. First operand 162 states and 371 transitions. Second operand 18 states. [2019-12-26 20:48:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:45,055 INFO L93 Difference]: Finished difference Result 244 states and 530 transitions. [2019-12-26 20:48:45,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:48:45,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:45,057 INFO L225 Difference]: With dead ends: 244 [2019-12-26 20:48:45,057 INFO L226 Difference]: Without dead ends: 243 [2019-12-26 20:48:45,058 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 [2019-12-26 20:48:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-26 20:48:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 161. [2019-12-26 20:48:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-26 20:48:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 368 transitions. [2019-12-26 20:48:45,062 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 368 transitions. Word has length 14 [2019-12-26 20:48:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:45,062 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 368 transitions. [2019-12-26 20:48:45,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 368 transitions. [2019-12-26 20:48:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:45,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:45,063 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:45,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:45,266 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 131 times [2019-12-26 20:48:45,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:45,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538502105] [2019-12-26 20:48:45,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:45,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538502105] [2019-12-26 20:48:45,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355431113] [2019-12-26 20:48:45,350 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 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 [2019-12-26 20:48:45,395 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:48:45,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:45,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:45,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:45,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:45,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:45,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903093917] [2019-12-26 20:48:45,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:45,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:45,505 INFO L87 Difference]: Start difference. First operand 161 states and 368 transitions. Second operand 18 states. [2019-12-26 20:48:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:46,008 INFO L93 Difference]: Finished difference Result 254 states and 558 transitions. [2019-12-26 20:48:46,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:46,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:46,010 INFO L225 Difference]: With dead ends: 254 [2019-12-26 20:48:46,010 INFO L226 Difference]: Without dead ends: 248 [2019-12-26 20:48:46,010 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 [2019-12-26 20:48:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-26 20:48:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-26 20:48:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-26 20:48:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-26 20:48:46,014 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-26 20:48:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:46,014 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-26 20:48:46,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-26 20:48:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:46,015 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:46,015 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:46,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:46,215 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 132 times [2019-12-26 20:48:46,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:46,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255769826] [2019-12-26 20:48:46,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:46,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255769826] [2019-12-26 20:48:46,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177413762] [2019-12-26 20:48:46,307 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 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 [2019-12-26 20:48:46,357 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:46,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:46,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:46,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:46,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:46,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:46,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807773848] [2019-12-26 20:48:46,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:46,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:46,460 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-26 20:48:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:46,871 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2019-12-26 20:48:46,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:46,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:46,873 INFO L225 Difference]: With dead ends: 255 [2019-12-26 20:48:46,873 INFO L226 Difference]: Without dead ends: 254 [2019-12-26 20:48:46,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-26 20:48:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 162. [2019-12-26 20:48:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-26 20:48:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-26 20:48:46,876 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-26 20:48:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:46,877 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-26 20:48:46,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-26 20:48:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:46,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:46,877 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:47,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:47,078 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:47,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 133 times [2019-12-26 20:48:47,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:47,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80265924] [2019-12-26 20:48:47,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:47,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80265924] [2019-12-26 20:48:47,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553614297] [2019-12-26 20:48:47,165 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 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 [2019-12-26 20:48:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:47,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:47,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:47,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:47,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:47,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614729664] [2019-12-26 20:48:47,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:47,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:47,314 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-26 20:48:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:47,673 INFO L93 Difference]: Finished difference Result 254 states and 559 transitions. [2019-12-26 20:48:47,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:48:47,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:47,674 INFO L225 Difference]: With dead ends: 254 [2019-12-26 20:48:47,675 INFO L226 Difference]: Without dead ends: 253 [2019-12-26 20:48:47,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:48:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-12-26 20:48:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 162. [2019-12-26 20:48:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-26 20:48:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-26 20:48:47,679 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-26 20:48:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:47,679 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-26 20:48:47,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-26 20:48:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:47,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:47,680 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:47,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:47,880 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 134 times [2019-12-26 20:48:47,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:47,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277106827] [2019-12-26 20:48:47,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:47,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277106827] [2019-12-26 20:48:47,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908949116] [2019-12-26 20:48:47,976 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 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 [2019-12-26 20:48:48,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:48,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:48,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:48,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:48,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:48,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293388033] [2019-12-26 20:48:48,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:48,119 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-26 20:48:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:48,586 INFO L93 Difference]: Finished difference Result 250 states and 550 transitions. [2019-12-26 20:48:48,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:48,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:48,588 INFO L225 Difference]: With dead ends: 250 [2019-12-26 20:48:48,588 INFO L226 Difference]: Without dead ends: 247 [2019-12-26 20:48:48,588 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 [2019-12-26 20:48:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-26 20:48:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 158. [2019-12-26 20:48:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-26 20:48:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-26 20:48:48,593 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-26 20:48:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:48,593 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-26 20:48:48,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-26 20:48:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:48,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:48,593 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:48,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:48,795 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 135 times [2019-12-26 20:48:48,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:48,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257446107] [2019-12-26 20:48:48,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:48,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257446107] [2019-12-26 20:48:48,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807443531] [2019-12-26 20:48:48,928 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 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 [2019-12-26 20:48:48,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:48:48,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:49,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:48:49,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:49,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:49,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:49,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323097931] [2019-12-26 20:48:49,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:49,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:49,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:49,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:49,197 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 18 states. [2019-12-26 20:48:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:49,961 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2019-12-26 20:48:49,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:49,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:49,962 INFO L225 Difference]: With dead ends: 241 [2019-12-26 20:48:49,963 INFO L226 Difference]: Without dead ends: 240 [2019-12-26 20:48:49,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:48:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-26 20:48:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2019-12-26 20:48:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:48:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-26 20:48:49,966 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-26 20:48:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:49,966 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-26 20:48:49,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-26 20:48:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:49,967 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:49,967 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:50,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:50,170 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 136 times [2019-12-26 20:48:50,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:50,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678644853] [2019-12-26 20:48:50,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:50,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678644853] [2019-12-26 20:48:50,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073367083] [2019-12-26 20:48:50,323 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 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 [2019-12-26 20:48:50,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:50,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:50,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:50,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:50,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:50,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:50,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103538631] [2019-12-26 20:48:50,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:50,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:50,631 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 18 states. [2019-12-26 20:48:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:51,165 INFO L93 Difference]: Finished difference Result 193 states and 419 transitions. [2019-12-26 20:48:51,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:48:51,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:51,167 INFO L225 Difference]: With dead ends: 193 [2019-12-26 20:48:51,167 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:48:51,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:48:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-26 20:48:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-26 20:48:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-26 20:48:51,171 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-26 20:48:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:51,171 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-26 20:48:51,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-26 20:48:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:51,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:51,171 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:51,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:51,372 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 137 times [2019-12-26 20:48:51,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:51,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546580294] [2019-12-26 20:48:51,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:51,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546580294] [2019-12-26 20:48:51,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689061474] [2019-12-26 20:48:51,464 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 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 [2019-12-26 20:48:51,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:48:51,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:51,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:51,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:51,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:51,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:51,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866812407] [2019-12-26 20:48:51,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:51,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:51,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:51,684 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-26 20:48:53,927 WARN L192 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-26 20:48:54,630 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-26 20:48:54,782 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-26 20:48:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:54,859 INFO L93 Difference]: Finished difference Result 224 states and 477 transitions. [2019-12-26 20:48:54,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:54,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:54,861 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:48:54,861 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:48:54,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:48:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-26 20:48:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:48:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2019-12-26 20:48:54,865 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 14 [2019-12-26 20:48:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:54,865 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2019-12-26 20:48:54,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2019-12-26 20:48:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:54,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:54,865 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:55,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:55,066 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 138 times [2019-12-26 20:48:55,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:55,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094940308] [2019-12-26 20:48:55,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:55,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094940308] [2019-12-26 20:48:55,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061484278] [2019-12-26 20:48:55,151 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 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 [2019-12-26 20:48:55,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:55,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:55,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:55,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:55,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:55,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:55,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501950541] [2019-12-26 20:48:55,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:55,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:55,571 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand 18 states. [2019-12-26 20:48:56,085 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-26 20:48:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:56,395 INFO L93 Difference]: Finished difference Result 210 states and 454 transitions. [2019-12-26 20:48:56,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:56,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:56,396 INFO L225 Difference]: With dead ends: 210 [2019-12-26 20:48:56,396 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:48:56,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:48:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2019-12-26 20:48:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-26 20:48:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-26 20:48:56,400 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-26 20:48:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:56,400 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-26 20:48:56,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-26 20:48:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:56,400 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:56,400 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:56,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:56,601 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 139 times [2019-12-26 20:48:56,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:56,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894337424] [2019-12-26 20:48:56,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:56,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894337424] [2019-12-26 20:48:56,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533372221] [2019-12-26 20:48:56,696 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 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 [2019-12-26 20:48:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:56,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:56,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:57,171 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:48:57,613 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_488 Int)) (and (<= c_~i~0 (+ v_~i~0_488 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_488 1)) (<= (div (+ (* v_~i~0_488 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-26 20:49:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-12-26 20:49:05,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:05,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:05,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972516312] [2019-12-26 20:49:05,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:05,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=194, Unknown=2, NotChecked=30, Total=306 [2019-12-26 20:49:05,725 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-26 20:49:05,912 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-26 20:49:08,086 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:49:09,200 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-26 20:49:12,049 WARN L192 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-12-26 20:49:15,095 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:49:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:15,145 INFO L93 Difference]: Finished difference Result 230 states and 489 transitions. [2019-12-26 20:49:15,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:15,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:15,146 INFO L225 Difference]: With dead ends: 230 [2019-12-26 20:49:15,147 INFO L226 Difference]: Without dead ends: 227 [2019-12-26 20:49:15,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=328, Invalid=729, Unknown=3, NotChecked=62, Total=1122 [2019-12-26 20:49:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-26 20:49:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 152. [2019-12-26 20:49:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:49:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-26 20:49:15,150 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-26 20:49:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:15,151 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-26 20:49:15,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-26 20:49:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:15,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:15,151 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:15,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:15,353 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 140 times [2019-12-26 20:49:15,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:15,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538805588] [2019-12-26 20:49:15,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:15,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538805588] [2019-12-26 20:49:15,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804243994] [2019-12-26 20:49:15,465 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 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 [2019-12-26 20:49:15,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:15,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:15,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:15,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:17,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:17,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:17,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368014310] [2019-12-26 20:49:17,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:17,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:17,585 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 18 states. [2019-12-26 20:49:18,137 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-26 20:49:18,772 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-26 20:49:19,828 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-12-26 20:49:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:21,193 INFO L93 Difference]: Finished difference Result 246 states and 519 transitions. [2019-12-26 20:49:21,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:21,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:21,194 INFO L225 Difference]: With dead ends: 246 [2019-12-26 20:49:21,194 INFO L226 Difference]: Without dead ends: 242 [2019-12-26 20:49:21,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=327, Invalid=662, Unknown=3, NotChecked=0, Total=992 [2019-12-26 20:49:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-26 20:49:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2019-12-26 20:49:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:49:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 360 transitions. [2019-12-26 20:49:21,198 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 360 transitions. Word has length 14 [2019-12-26 20:49:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:21,198 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 360 transitions. [2019-12-26 20:49:21,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 360 transitions. [2019-12-26 20:49:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:21,198 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:21,198 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:21,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:21,400 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 141 times [2019-12-26 20:49:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:21,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748913275] [2019-12-26 20:49:21,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:21,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748913275] [2019-12-26 20:49:21,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725201378] [2019-12-26 20:49:21,483 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 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 [2019-12-26 20:49:21,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:21,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:21,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:21,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:21,867 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:49:22,308 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_498 Int)) (and (<= c_~j~0 (+ v_~i~0_498 c_~i~0 1)) (<= (div (+ (* v_~i~0_498 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 2 v_~i~0_498) 1)))) is different from true [2019-12-26 20:49:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-26 20:49:23,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:23,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:23,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112452845] [2019-12-26 20:49:23,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:23,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=196, Unknown=1, NotChecked=30, Total=306 [2019-12-26 20:49:23,814 INFO L87 Difference]: Start difference. First operand 155 states and 360 transitions. Second operand 18 states. [2019-12-26 20:49:26,487 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-26 20:49:27,701 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-26 20:49:28,948 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-12-26 20:49:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:28,978 INFO L93 Difference]: Finished difference Result 239 states and 511 transitions. [2019-12-26 20:49:28,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:28,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:28,979 INFO L225 Difference]: With dead ends: 239 [2019-12-26 20:49:28,979 INFO L226 Difference]: Without dead ends: 237 [2019-12-26 20:49:28,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=323, Invalid=735, Unknown=2, NotChecked=62, Total=1122 [2019-12-26 20:49:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-26 20:49:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2019-12-26 20:49:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:49:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2019-12-26 20:49:28,982 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 14 [2019-12-26 20:49:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:28,982 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2019-12-26 20:49:28,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2019-12-26 20:49:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:28,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:28,983 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:29,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:29,183 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash -595965165, now seen corresponding path program 142 times [2019-12-26 20:49:29,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:29,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821955549] [2019-12-26 20:49:29,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:29,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821955549] [2019-12-26 20:49:29,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145065754] [2019-12-26 20:49:29,271 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 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 [2019-12-26 20:49:29,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:29,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:29,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:29,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:29,874 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:49:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:30,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:30,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:30,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272284499] [2019-12-26 20:49:30,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:30,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:30,221 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand 18 states. [2019-12-26 20:49:30,765 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-12-26 20:49:31,880 WARN L192 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:49:33,095 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2019-12-26 20:49:34,695 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-26 20:49:37,093 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-12-26 20:49:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:37,627 INFO L93 Difference]: Finished difference Result 223 states and 479 transitions. [2019-12-26 20:49:37,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:37,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:37,628 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:49:37,629 INFO L226 Difference]: Without dead ends: 219 [2019-12-26 20:49:37,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=390, Invalid=796, Unknown=4, NotChecked=0, Total=1190 [2019-12-26 20:49:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-26 20:49:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 153. [2019-12-26 20:49:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:49:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-26 20:49:37,632 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-26 20:49:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:37,632 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-26 20:49:37,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-26 20:49:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:37,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:37,633 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:37,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:37,833 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 143 times [2019-12-26 20:49:37,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:37,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874718903] [2019-12-26 20:49:37,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:37,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874718903] [2019-12-26 20:49:37,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373862006] [2019-12-26 20:49:37,935 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 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 [2019-12-26 20:49:38,005 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:38,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:38,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:38,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:41,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:41,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:41,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493133167] [2019-12-26 20:49:41,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:41,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=219, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:41,188 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 18 states. [2019-12-26 20:49:42,252 WARN L192 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2019-12-26 20:49:42,902 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-26 20:49:43,860 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-12-26 20:49:45,095 WARN L192 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-26 20:49:45,385 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-26 20:49:46,749 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-26 20:49:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:46,813 INFO L93 Difference]: Finished difference Result 234 states and 503 transitions. [2019-12-26 20:49:46,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:46,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:46,815 INFO L225 Difference]: With dead ends: 234 [2019-12-26 20:49:46,815 INFO L226 Difference]: Without dead ends: 233 [2019-12-26 20:49:46,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=391, Invalid=795, Unknown=4, NotChecked=0, Total=1190 [2019-12-26 20:49:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-26 20:49:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2019-12-26 20:49:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-26 20:49:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-26 20:49:46,819 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-26 20:49:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:46,819 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-26 20:49:46,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-26 20:49:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:46,819 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:46,819 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:47,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:47,020 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 144 times [2019-12-26 20:49:47,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:47,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309922552] [2019-12-26 20:49:47,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:47,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309922552] [2019-12-26 20:49:47,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614254763] [2019-12-26 20:49:47,158 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 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 [2019-12-26 20:49:47,224 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:49:47,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:47,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:47,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:47,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:47,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:47,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254392364] [2019-12-26 20:49:47,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:47,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:47,671 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-26 20:49:48,572 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2019-12-26 20:49:54,915 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-26 20:49:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:55,073 INFO L93 Difference]: Finished difference Result 223 states and 476 transitions. [2019-12-26 20:49:55,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:55,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:55,075 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:49:55,075 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:49:55,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:49:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 153. [2019-12-26 20:49:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:49:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-26 20:49:55,078 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-26 20:49:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:55,079 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-26 20:49:55,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-26 20:49:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:55,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:55,079 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:55,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:55,280 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 145 times [2019-12-26 20:49:55,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:55,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920869075] [2019-12-26 20:49:55,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:55,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920869075] [2019-12-26 20:49:55,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421552472] [2019-12-26 20:49:55,368 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 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 [2019-12-26 20:49:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:55,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:55,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:55,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:55,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:55,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496970083] [2019-12-26 20:49:55,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:55,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:55,721 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 18 states. [2019-12-26 20:50:00,656 WARN L192 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2019-12-26 20:50:03,124 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:50:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:03,219 INFO L93 Difference]: Finished difference Result 234 states and 496 transitions. [2019-12-26 20:50:03,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:50:03,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:03,221 INFO L225 Difference]: With dead ends: 234 [2019-12-26 20:50:03,221 INFO L226 Difference]: Without dead ends: 231 [2019-12-26 20:50:03,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=340, Invalid=712, Unknown=4, NotChecked=0, Total=1056 [2019-12-26 20:50:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-26 20:50:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 154. [2019-12-26 20:50:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:50:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-26 20:50:03,225 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-26 20:50:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:03,225 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-26 20:50:03,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-26 20:50:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:03,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:03,226 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:03,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:03,426 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:03,427 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 146 times [2019-12-26 20:50:03,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:03,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132466199] [2019-12-26 20:50:03,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:03,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132466199] [2019-12-26 20:50:03,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126157829] [2019-12-26 20:50:03,527 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 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 [2019-12-26 20:50:03,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:50:03,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:03,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:50:03,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:03,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:03,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:03,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290433255] [2019-12-26 20:50:03,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:03,936 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-26 20:50:05,066 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 Received shutdown request... [2019-12-26 20:50:09,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:50:09,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:09,446 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-26 20:50:09,452 WARN L227 ceAbstractionStarter]: Timeout [2019-12-26 20:50:09,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:50:09 BasicIcfg [2019-12-26 20:50:09,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:50:09,453 INFO L168 Benchmark]: Toolchain (without parser) took 289122.12 ms. Allocated memory was 105.9 MB in the beginning and 188.2 MB in the end (delta: 82.3 MB). Free memory was 69.5 MB in the beginning and 155.3 MB in the end (delta: -85.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-26 20:50:09,454 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 105.9 MB. Free memory was 88.2 MB in the beginning and 88.1 MB in the end (delta: 105.0 kB). Peak memory consumption was 105.0 kB. Max. memory is 7.1 GB. [2019-12-26 20:50:09,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.79 ms. Allocated memory was 105.9 MB in the beginning and 163.1 MB in the end (delta: 57.1 MB). Free memory was 69.2 MB in the beginning and 130.2 MB in the end (delta: -61.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:09,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 163.1 MB. Free memory was 130.2 MB in the beginning and 128.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:09,455 INFO L168 Benchmark]: Boogie Preprocessor took 26.73 ms. Allocated memory is still 163.1 MB. Free memory was 128.3 MB in the beginning and 126.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:09,455 INFO L168 Benchmark]: RCFGBuilder took 448.41 ms. Allocated memory is still 163.1 MB. Free memory was 126.5 MB in the beginning and 107.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:09,456 INFO L168 Benchmark]: TraceAbstraction took 287823.48 ms. Allocated memory was 163.1 MB in the beginning and 188.2 MB in the end (delta: 25.2 MB). Free memory was 106.5 MB in the beginning and 155.3 MB in the end (delta: -48.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-26 20:50:09,457 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 105.9 MB. Free memory was 88.2 MB in the beginning and 88.1 MB in the end (delta: 105.0 kB). Peak memory consumption was 105.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 766.79 ms. Allocated memory was 105.9 MB in the beginning and 163.1 MB in the end (delta: 57.1 MB). Free memory was 69.2 MB in the beginning and 130.2 MB in the end (delta: -61.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 163.1 MB. Free memory was 130.2 MB in the beginning and 128.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.73 ms. Allocated memory is still 163.1 MB. Free memory was 128.3 MB in the beginning and 126.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.41 ms. Allocated memory is still 163.1 MB. Free memory was 126.5 MB in the beginning and 107.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287823.48 ms. Allocated memory was 163.1 MB in the beginning and 188.2 MB in the end (delta: 25.2 MB). Free memory was 106.5 MB in the beginning and 155.3 MB in the end (delta: -48.8 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 (154states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (54 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 287.7s, OverallIterations: 160, TraceHistogramMax: 7, AutomataDifference: 172.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1591 SDtfs, 19749 SDslu, 12332 SDs, 0 SdLazy, 7095 SolverSat, 3975 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 44.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4392 GetRequests, 769 SyntacticMatches, 19 SemanticMatches, 3604 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 21175 ImplicationChecksByTransitivity, 194.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 159 MinimizatonAttempts, 7505 StatesRemovedByMinimization, 156 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 3975 NumberOfCodeBlocks, 3975 NumberOfCodeBlocksAsserted, 514 NumberOfCheckSat, 3660 ConstructedInterpolants, 167 QuantifiedInterpolants, 428794 SizeOfPredicates, 0 NumberOfNonLiveVariables, 14329 ConjunctsInSsa, 1668 ConjunctsInUnsatCore, 315 InterpolantComputations, 7 PerfectInterpolantSequences, 36/2214 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