/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 15:42:58,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 15:42:58,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 15:42:58,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 15:42:58,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 15:42:58,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 15:42:58,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 15:42:58,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 15:42:58,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 15:42:58,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 15:42:58,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 15:42:58,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 15:42:58,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 15:42:58,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 15:42:58,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 15:42:58,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 15:42:58,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 15:42:58,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 15:42:58,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 15:42:58,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 15:42:58,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 15:42:58,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 15:42:58,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 15:42:58,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 15:42:58,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 15:42:58,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 15:42:58,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 15:42:58,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 15:42:58,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 15:42:58,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 15:42:58,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 15:42:58,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 15:42:58,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 15:42:58,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 15:42:58,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 15:42:58,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 15:42:58,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 15:42:58,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 15:42:58,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 15:42:58,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 15:42:58,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 15:42:58,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2019-12-18 15:42:58,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 15:42:58,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 15:42:58,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 15:42:58,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 15:42:58,242 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 15:42:58,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 15:42:58,242 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 15:42:58,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 15:42:58,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 15:42:58,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 15:42:58,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 15:42:58,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 15:42:58,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 15:42:58,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 15:42:58,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 15:42:58,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 15:42:58,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 15:42:58,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 15:42:58,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 15:42:58,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 15:42:58,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 15:42:58,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 15:42:58,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 15:42:58,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 15:42:58,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 15:42:58,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 15:42:58,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 15:42:58,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 15:42:58,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 15:42:58,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 15:42:58,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 15:42:58,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 15:42:58,554 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 15:42:58,554 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 15:42:58,555 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 15:42:58,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc56e551b/e73e6673385d4581adb4a5e2bdc4b063/FLAGba994b92f [2019-12-18 15:42:59,177 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 15:42:59,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 15:42:59,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc56e551b/e73e6673385d4581adb4a5e2bdc4b063/FLAGba994b92f [2019-12-18 15:42:59,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc56e551b/e73e6673385d4581adb4a5e2bdc4b063 [2019-12-18 15:42:59,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 15:42:59,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 15:42:59,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 15:42:59,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 15:42:59,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 15:42:59,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:42:59" (1/1) ... [2019-12-18 15:42:59,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad6347d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:42:59, skipping insertion in model container [2019-12-18 15:42:59,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:42:59" (1/1) ... [2019-12-18 15:42:59,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 15:42:59,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 15:43:00,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:43:00,048 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 15:43:00,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:43:00,171 INFO L208 MainTranslator]: Completed translation [2019-12-18 15:43:00,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00 WrapperNode [2019-12-18 15:43:00,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 15:43:00,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 15:43:00,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 15:43:00,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 15:43:00,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 15:43:00,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 15:43:00,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 15:43:00,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 15:43:00,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (1/1) ... [2019-12-18 15:43:00,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 15:43:00,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 15:43:00,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 15:43:00,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 15:43:00,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (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 [2019-12-18 15:43:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 15:43:00,316 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 15:43:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 15:43:00,316 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 15:43:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 15:43:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 15:43:00,319 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 15:43:00,682 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 15:43:00,682 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 15:43:00,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:43:00 BoogieIcfgContainer [2019-12-18 15:43:00,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 15:43:00,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 15:43:00,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 15:43:00,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 15:43:00,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 03:42:59" (1/3) ... [2019-12-18 15:43:00,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd22178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:43:00, skipping insertion in model container [2019-12-18 15:43:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:43:00" (2/3) ... [2019-12-18 15:43:00,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd22178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:43:00, skipping insertion in model container [2019-12-18 15:43:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:43:00" (3/3) ... [2019-12-18 15:43:00,691 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-18 15:43:00,701 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 15:43:00,702 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 15:43:00,707 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 15:43:00,708 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 15:43:00,733 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,733 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,734 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,734 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,735 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,735 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,735 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,735 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,736 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,736 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,736 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,737 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,737 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,737 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,739 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,739 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,739 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,739 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,740 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,740 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,741 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,743 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,743 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,750 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,750 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,750 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,751 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,751 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,751 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,765 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,766 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,766 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,766 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,767 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,767 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:43:00,786 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 15:43:00,807 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 15:43:00,807 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 15:43:00,808 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 15:43:00,808 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 15:43:00,808 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 15:43:00,808 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 15:43:00,808 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 15:43:00,809 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 15:43:00,822 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-18 15:43:00,824 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 15:43:00,863 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 15:43:00,863 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:43:00,869 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 15:43:00,872 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 15:43:00,889 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 15:43:00,889 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:43:00,891 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 15:43:00,893 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-18 15:43:00,894 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 15:43:02,052 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-18 15:43:02,179 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-18 15:43:02,180 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-18 15:43:02,183 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 15:43:02,191 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 15:43:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 15:43:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 15:43:02,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:02,199 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 15:43:02,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-18 15:43:02,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:02,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653545] [2019-12-18 15:43:02,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:02,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653545] [2019-12-18 15:43:02,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:43:02,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 15:43:02,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781393625] [2019-12-18 15:43:02,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 15:43:02,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 15:43:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 15:43:02,465 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 15:43:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:02,504 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-18 15:43:02,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 15:43:02,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 15:43:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:02,518 INFO L225 Difference]: With dead ends: 48 [2019-12-18 15:43:02,518 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 15:43:02,519 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 [2019-12-18 15:43:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 15:43:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 15:43:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 15:43:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-18 15:43:02,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-18 15:43:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:02,560 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-18 15:43:02,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 15:43:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-18 15:43:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 15:43:02,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:02,561 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:02,561 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-18 15:43:02,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:02,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737771783] [2019-12-18 15:43:02,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:02,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737771783] [2019-12-18 15:43:02,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:43:02,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 15:43:02,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40251914] [2019-12-18 15:43:02,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 15:43:02,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 15:43:02,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:43:02,659 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-18 15:43:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:02,677 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 15:43:02,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 15:43:02,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 15:43:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:02,678 INFO L225 Difference]: With dead ends: 34 [2019-12-18 15:43:02,678 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 15:43:02,679 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 [2019-12-18 15:43:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 15:43:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 15:43:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 15:43:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 15:43:02,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-18 15:43:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:02,686 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 15:43:02,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 15:43:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 15:43:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:43:02,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:02,687 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:02,687 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-18 15:43:02,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:02,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52804221] [2019-12-18 15:43:02,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:02,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52804221] [2019-12-18 15:43:02,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:43:02,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:43:02,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929886206] [2019-12-18 15:43:02,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:43:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:43:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:43:02,752 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-18 15:43:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:02,784 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 15:43:02,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 15:43:02,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:43:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:02,785 INFO L225 Difference]: With dead ends: 34 [2019-12-18 15:43:02,785 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 15:43:02,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 15:43:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 15:43:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-18 15:43:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 15:43:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 15:43:02,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-18 15:43:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:02,791 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 15:43:02,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:43:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 15:43:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:43:02,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:02,792 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:02,792 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-18 15:43:02,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:02,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997380258] [2019-12-18 15:43:02,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:02,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997380258] [2019-12-18 15:43:02,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:43:02,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:43:02,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540316212] [2019-12-18 15:43:02,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:43:02,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:43:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:43:02,857 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-18 15:43:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:02,889 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 15:43:02,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:43:02,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:43:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:02,890 INFO L225 Difference]: With dead ends: 32 [2019-12-18 15:43:02,890 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 15:43:02,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 15:43:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 15:43:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 15:43:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 15:43:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 15:43:02,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-18 15:43:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:02,896 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 15:43:02,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:43:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 15:43:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:43:02,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:02,897 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:02,897 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-18 15:43:02,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:02,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643589465] [2019-12-18 15:43:02,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:02,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643589465] [2019-12-18 15:43:02,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639295136] [2019-12-18 15:43:02,961 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 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 [2019-12-18 15:43:03,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:43:03,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:03,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:43:03,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:03,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:03,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 15:43:03,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044958318] [2019-12-18 15:43:03,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 15:43:03,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 15:43:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 15:43:03,067 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-18 15:43:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:03,163 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 15:43:03,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:43:03,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 15:43:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:03,165 INFO L225 Difference]: With dead ends: 32 [2019-12-18 15:43:03,165 INFO L226 Difference]: Without dead ends: 29 [2019-12-18 15:43:03,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:43:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-18 15:43:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-18 15:43:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 15:43:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 15:43:03,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-18 15:43:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:03,174 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 15:43:03,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 15:43:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 15:43:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:43:03,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:03,176 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:03,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:03,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-18 15:43:03,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:03,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433312745] [2019-12-18 15:43:03,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:03,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433312745] [2019-12-18 15:43:03,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365506093] [2019-12-18 15:43:03,447 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 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 [2019-12-18 15:43:03,515 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:43:03,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:03,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:43:03,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:03,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:03,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 15:43:03,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102558159] [2019-12-18 15:43:03,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 15:43:03,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 15:43:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 15:43:03,546 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-18 15:43:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:03,627 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-18 15:43:03,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:43:03,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 15:43:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:03,630 INFO L225 Difference]: With dead ends: 33 [2019-12-18 15:43:03,630 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 15:43:03,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:43:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 15:43:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 15:43:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 15:43:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 15:43:03,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-18 15:43:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:03,640 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 15:43:03,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 15:43:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 15:43:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:43:03,641 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:03,641 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:03,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:03,852 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-18 15:43:03,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:03,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505639139] [2019-12-18 15:43:03,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:03,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505639139] [2019-12-18 15:43:03,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381341726] [2019-12-18 15:43:03,948 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 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 [2019-12-18 15:43:04,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:43:04,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:04,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:43:04,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:04,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:04,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 15:43:04,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855893286] [2019-12-18 15:43:04,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:43:04,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:43:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:43:04,039 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-18 15:43:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:04,127 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 15:43:04,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:43:04,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 15:43:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:04,129 INFO L225 Difference]: With dead ends: 34 [2019-12-18 15:43:04,129 INFO L226 Difference]: Without dead ends: 31 [2019-12-18 15:43:04,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:43:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-18 15:43:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-18 15:43:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-18 15:43:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-18 15:43:04,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-18 15:43:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:04,134 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-18 15:43:04,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:43:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-18 15:43:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:43:04,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:04,135 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:04,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:04,341 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-18 15:43:04,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:04,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472380798] [2019-12-18 15:43:04,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:04,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472380798] [2019-12-18 15:43:04,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708333226] [2019-12-18 15:43:04,440 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 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 [2019-12-18 15:43:04,497 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:43:04,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:04,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:43:04,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:04,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:04,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 15:43:04,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464875493] [2019-12-18 15:43:04,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:43:04,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:43:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:43:04,516 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-18 15:43:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:04,611 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-18 15:43:04,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:43:04,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 15:43:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:04,612 INFO L225 Difference]: With dead ends: 35 [2019-12-18 15:43:04,613 INFO L226 Difference]: Without dead ends: 32 [2019-12-18 15:43:04,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:43:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-18 15:43:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-18 15:43:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-18 15:43:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-18 15:43:04,617 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-18 15:43:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:04,618 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-18 15:43:04,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:43:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-18 15:43:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:43:04,619 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:04,619 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:04,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:04,822 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-18 15:43:04,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:04,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347949361] [2019-12-18 15:43:04,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:04,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347949361] [2019-12-18 15:43:04,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799835913] [2019-12-18 15:43:04,890 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 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 [2019-12-18 15:43:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:04,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:43:04,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:04,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:04,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 15:43:04,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963987348] [2019-12-18 15:43:04,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 15:43:04,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 15:43:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 15:43:04,978 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-18 15:43:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:05,076 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-18 15:43:05,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:43:05,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 15:43:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:05,077 INFO L225 Difference]: With dead ends: 36 [2019-12-18 15:43:05,077 INFO L226 Difference]: Without dead ends: 33 [2019-12-18 15:43:05,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:43:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-18 15:43:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-18 15:43:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-18 15:43:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-18 15:43:05,083 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-18 15:43:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:05,083 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-18 15:43:05,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 15:43:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-18 15:43:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:43:05,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:05,084 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:05,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:05,291 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-18 15:43:05,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:05,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058788769] [2019-12-18 15:43:05,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:05,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058788769] [2019-12-18 15:43:05,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724658348] [2019-12-18 15:43:05,364 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:05,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:43:05,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:05,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:43:05,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:05,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:05,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 15:43:05,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808405151] [2019-12-18 15:43:05,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 15:43:05,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 15:43:05,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 15:43:05,462 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-18 15:43:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:05,566 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-18 15:43:05,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:43:05,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 15:43:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:05,568 INFO L225 Difference]: With dead ends: 37 [2019-12-18 15:43:05,568 INFO L226 Difference]: Without dead ends: 34 [2019-12-18 15:43:05,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:43:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-18 15:43:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-18 15:43:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-18 15:43:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-18 15:43:05,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-18 15:43:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:05,573 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-18 15:43:05,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 15:43:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-18 15:43:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:43:05,574 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:05,574 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:05,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:05,775 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-18 15:43:05,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:05,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083879989] [2019-12-18 15:43:05,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:05,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083879989] [2019-12-18 15:43:05,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444076613] [2019-12-18 15:43:05,845 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 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 [2019-12-18 15:43:05,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:43:05,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:05,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:43:05,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:05,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:05,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 15:43:05,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006183464] [2019-12-18 15:43:05,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:43:05,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:43:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:43:05,920 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-18 15:43:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:06,063 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-18 15:43:06,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:43:06,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 15:43:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:06,064 INFO L225 Difference]: With dead ends: 38 [2019-12-18 15:43:06,064 INFO L226 Difference]: Without dead ends: 35 [2019-12-18 15:43:06,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:43:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-18 15:43:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-18 15:43:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-18 15:43:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-18 15:43:06,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-18 15:43:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:06,070 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-18 15:43:06,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:43:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-18 15:43:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:43:06,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:06,073 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:06,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:06,274 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-18 15:43:06,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:06,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950208119] [2019-12-18 15:43:06,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:06,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950208119] [2019-12-18 15:43:06,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178032416] [2019-12-18 15:43:06,369 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 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 [2019-12-18 15:43:06,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:43:06,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:06,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:43:06,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:06,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:06,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 15:43:06,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331873709] [2019-12-18 15:43:06,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:43:06,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:43:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:43:06,431 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-18 15:43:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:06,567 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-18 15:43:06,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:43:06,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 15:43:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:06,568 INFO L225 Difference]: With dead ends: 39 [2019-12-18 15:43:06,568 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 15:43:06,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:43:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 15:43:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 15:43:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 15:43:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-18 15:43:06,572 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-18 15:43:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:06,573 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-18 15:43:06,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:43:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-18 15:43:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:43:06,574 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:06,574 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:06,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:06,778 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-18 15:43:06,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:06,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005999151] [2019-12-18 15:43:06,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:06,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005999151] [2019-12-18 15:43:06,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329908438] [2019-12-18 15:43:06,874 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 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 [2019-12-18 15:43:06,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 15:43:06,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:06,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:43:06,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:06,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:06,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 15:43:06,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769023810] [2019-12-18 15:43:06,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 15:43:06,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 15:43:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 15:43:06,955 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-18 15:43:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:07,120 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-18 15:43:07,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:43:07,120 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 15:43:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:07,121 INFO L225 Difference]: With dead ends: 40 [2019-12-18 15:43:07,121 INFO L226 Difference]: Without dead ends: 37 [2019-12-18 15:43:07,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-18 15:43:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-18 15:43:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-18 15:43:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-18 15:43:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-18 15:43:07,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-18 15:43:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:07,131 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-18 15:43:07,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 15:43:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-18 15:43:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:43:07,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:07,132 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:07,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:07,333 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-18 15:43:07,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:07,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873671680] [2019-12-18 15:43:07,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:07,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873671680] [2019-12-18 15:43:07,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359433809] [2019-12-18 15:43:07,423 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 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 [2019-12-18 15:43:07,469 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:43:07,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:07,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:43:07,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:07,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:07,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 15:43:07,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964510786] [2019-12-18 15:43:07,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 15:43:07,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 15:43:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 15:43:07,487 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-18 15:43:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:07,646 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-18 15:43:07,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:43:07,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 15:43:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:07,647 INFO L225 Difference]: With dead ends: 41 [2019-12-18 15:43:07,647 INFO L226 Difference]: Without dead ends: 38 [2019-12-18 15:43:07,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:43:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-18 15:43:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-18 15:43:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-18 15:43:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-18 15:43:07,651 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-18 15:43:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:07,651 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-18 15:43:07,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 15:43:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-18 15:43:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 15:43:07,652 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:07,652 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:07,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:07,853 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-18 15:43:07,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:07,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018312288] [2019-12-18 15:43:07,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:07,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018312288] [2019-12-18 15:43:07,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838465701] [2019-12-18 15:43:07,965 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 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 [2019-12-18 15:43:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:08,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:43:08,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:08,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:08,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 15:43:08,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93011469] [2019-12-18 15:43:08,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:43:08,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:43:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:43:08,035 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-18 15:43:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:08,214 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-18 15:43:08,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:43:08,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 15:43:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:08,216 INFO L225 Difference]: With dead ends: 42 [2019-12-18 15:43:08,216 INFO L226 Difference]: Without dead ends: 39 [2019-12-18 15:43:08,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:43:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-18 15:43:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-18 15:43:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-18 15:43:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-18 15:43:08,220 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-18 15:43:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:08,220 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-18 15:43:08,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:43:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-18 15:43:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 15:43:08,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:08,221 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:08,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:08,424 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-18 15:43:08,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:08,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595784411] [2019-12-18 15:43:08,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:08,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595784411] [2019-12-18 15:43:08,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029235954] [2019-12-18 15:43:08,519 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 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 [2019-12-18 15:43:08,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:43:08,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:08,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:43:08,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:08,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:08,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 15:43:08,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030263584] [2019-12-18 15:43:08,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:43:08,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:43:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:43:08,602 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-18 15:43:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:08,786 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-18 15:43:08,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:43:08,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 15:43:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:08,787 INFO L225 Difference]: With dead ends: 43 [2019-12-18 15:43:08,787 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 15:43:08,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:43:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 15:43:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 15:43:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 15:43:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-18 15:43:08,792 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-18 15:43:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:08,792 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-18 15:43:08,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:43:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-18 15:43:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 15:43:08,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:08,793 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:09,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:09,001 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-18 15:43:09,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:09,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095000349] [2019-12-18 15:43:09,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:09,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095000349] [2019-12-18 15:43:09,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555891091] [2019-12-18 15:43:09,115 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 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 [2019-12-18 15:43:09,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 15:43:09,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:09,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 15:43:09,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:09,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:09,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 15:43:09,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420183494] [2019-12-18 15:43:09,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 15:43:09,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 15:43:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:43:09,203 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-18 15:43:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:09,396 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-18 15:43:09,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:43:09,397 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 15:43:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:09,398 INFO L225 Difference]: With dead ends: 44 [2019-12-18 15:43:09,398 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 15:43:09,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:43:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 15:43:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-18 15:43:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 15:43:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 15:43:09,402 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-18 15:43:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:09,403 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 15:43:09,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 15:43:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 15:43:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 15:43:09,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:09,403 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:09,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:09,609 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-18 15:43:09,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:09,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47544956] [2019-12-18 15:43:09,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:09,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47544956] [2019-12-18 15:43:09,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996542329] [2019-12-18 15:43:09,709 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 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 [2019-12-18 15:43:09,793 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:43:09,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:09,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 15:43:09,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:09,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:09,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 15:43:09,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004390952] [2019-12-18 15:43:09,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 15:43:09,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 15:43:09,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:43:09,827 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-18 15:43:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:10,007 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-18 15:43:10,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:43:10,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 15:43:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:10,008 INFO L225 Difference]: With dead ends: 45 [2019-12-18 15:43:10,009 INFO L226 Difference]: Without dead ends: 42 [2019-12-18 15:43:10,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:43:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-18 15:43:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-18 15:43:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-18 15:43:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-18 15:43:10,013 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-18 15:43:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:10,013 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-18 15:43:10,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 15:43:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-18 15:43:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 15:43:10,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:10,014 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:10,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:10,218 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-18 15:43:10,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:10,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664048981] [2019-12-18 15:43:10,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:10,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664048981] [2019-12-18 15:43:10,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094339402] [2019-12-18 15:43:10,344 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 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 [2019-12-18 15:43:10,391 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 15:43:10,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:10,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 15:43:10,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:10,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:10,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 15:43:10,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277836303] [2019-12-18 15:43:10,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:43:10,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:10,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:43:10,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:43:10,421 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-18 15:43:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:10,679 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-18 15:43:10,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:43:10,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 15:43:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:10,680 INFO L225 Difference]: With dead ends: 46 [2019-12-18 15:43:10,681 INFO L226 Difference]: Without dead ends: 43 [2019-12-18 15:43:10,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:43:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-18 15:43:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-18 15:43:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-18 15:43:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-18 15:43:10,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-18 15:43:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:10,685 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-18 15:43:10,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:43:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-18 15:43:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 15:43:10,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:10,686 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:10,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:10,887 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:10,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:10,887 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-18 15:43:10,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:10,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972002345] [2019-12-18 15:43:10,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:10,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972002345] [2019-12-18 15:43:10,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582719552] [2019-12-18 15:43:10,978 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 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 [2019-12-18 15:43:11,041 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 15:43:11,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:11,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 15:43:11,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:11,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:43:11,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 15:43:11,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995277748] [2019-12-18 15:43:11,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:43:11,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:43:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:43:11,068 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-18 15:43:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:11,282 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-18 15:43:11,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:43:11,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 15:43:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:11,283 INFO L225 Difference]: With dead ends: 47 [2019-12-18 15:43:11,283 INFO L226 Difference]: Without dead ends: 44 [2019-12-18 15:43:11,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:43:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-18 15:43:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-18 15:43:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-18 15:43:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-18 15:43:11,287 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-18 15:43:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:11,287 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-18 15:43:11,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:43:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-18 15:43:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 15:43:11,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:11,288 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:11,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:11,492 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-18 15:43:11,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:11,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070785646] [2019-12-18 15:43:11,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070785646] [2019-12-18 15:43:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27300880] [2019-12-18 15:43:11,556 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-18 15:43:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:11,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:43:11,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:11,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:43:11,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-18 15:43:11,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142255825] [2019-12-18 15:43:11,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:43:11,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:43:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 15:43:11,624 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-12-18 15:43:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:11,650 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-12-18 15:43:11,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:43:11,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 15:43:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:11,651 INFO L225 Difference]: With dead ends: 96 [2019-12-18 15:43:11,651 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 15:43:11,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 15:43:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 15:43:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 15:43:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 15:43:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-12-18 15:43:11,654 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-12-18 15:43:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:11,654 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-12-18 15:43:11,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:43:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-12-18 15:43:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 15:43:11,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:43:11,655 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:43:11,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:11,856 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:43:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:43:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-18 15:43:11,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:43:11,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692712767] [2019-12-18 15:43:11,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:43:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:43:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:11,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692712767] [2019-12-18 15:43:11,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23281392] [2019-12-18 15:43:11,961 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 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 [2019-12-18 15:43:12,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:43:12,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:43:12,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:43:12,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:43:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:43:12,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:43:12,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2019-12-18 15:43:12,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928156213] [2019-12-18 15:43:12,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:43:12,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:43:12,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:43:12,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:43:12,089 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-12-18 15:43:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:43:12,106 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-18 15:43:12,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:43:12,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 15:43:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:43:12,107 INFO L225 Difference]: With dead ends: 46 [2019-12-18 15:43:12,107 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 15:43:12,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:43:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 15:43:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 15:43:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 15:43:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 15:43:12,109 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-18 15:43:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:43:12,109 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 15:43:12,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:43:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 15:43:12,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 15:43:12,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:43:12,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 03:43:12 BasicIcfg [2019-12-18 15:43:12,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 15:43:12,316 INFO L168 Benchmark]: Toolchain (without parser) took 12833.25 ms. Allocated memory was 146.8 MB in the beginning and 304.1 MB in the end (delta: 157.3 MB). Free memory was 102.3 MB in the beginning and 222.7 MB in the end (delta: -120.4 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,317 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.66 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 101.8 MB in the beginning and 163.7 MB in the end (delta: -61.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.34 ms. Allocated memory is still 204.5 MB. Free memory was 163.7 MB in the beginning and 161.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,318 INFO L168 Benchmark]: Boogie Preprocessor took 34.45 ms. Allocated memory is still 204.5 MB. Free memory was 161.6 MB in the beginning and 160.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,319 INFO L168 Benchmark]: RCFGBuilder took 427.81 ms. Allocated memory is still 204.5 MB. Free memory was 160.3 MB in the beginning and 140.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,319 INFO L168 Benchmark]: TraceAbstraction took 11630.43 ms. Allocated memory was 204.5 MB in the beginning and 304.1 MB in the end (delta: 99.6 MB). Free memory was 140.2 MB in the beginning and 222.7 MB in the end (delta: -82.5 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2019-12-18 15:43:12,322 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 689.66 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 101.8 MB in the beginning and 163.7 MB in the end (delta: -61.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.34 ms. Allocated memory is still 204.5 MB. Free memory was 163.7 MB in the beginning and 161.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.45 ms. Allocated memory is still 204.5 MB. Free memory was 161.6 MB in the beginning and 160.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.81 ms. Allocated memory is still 204.5 MB. Free memory was 160.3 MB in the beginning and 140.8 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11630.43 ms. Allocated memory was 204.5 MB in the beginning and 304.1 MB in the end (delta: 99.6 MB). Free memory was 140.2 MB in the beginning and 222.7 MB in the end (delta: -82.5 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 11.5s, OverallIterations: 22, TraceHistogramMax: 6, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 274 SDtfs, 618 SDslu, 433 SDs, 0 SdLazy, 520 SolverSat, 401 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 90 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 534 NumberOfCodeBlocks, 534 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 494 ConstructedInterpolants, 0 QuantifiedInterpolants, 21188 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1782 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 70/380 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 proved your program to be correct! Received shutdown request...