/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-MCR.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:12:27,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:12:27,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:12:27,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:12:27,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:12:27,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:12:27,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:12:27,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:12:27,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:12:27,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:12:27,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:12:27,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:12:27,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:12:27,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:12:27,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:12:27,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:12:27,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:12:27,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:12:27,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:12:27,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:12:27,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:12:27,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:12:27,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:12:27,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:12:27,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:12:27,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:12:27,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:12:27,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:12:27,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:12:27,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:12:27,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:12:27,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:12:27,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:12:27,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:12:27,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:12:27,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:12:27,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:12:27,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:12:27,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:12:27,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:12:27,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:12:27,261 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-MCR.epf [2019-12-27 15:12:27,282 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:12:27,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:12:27,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:12:27,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:12:27,286 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:12:27,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:12:27,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:12:27,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:12:27,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:12:27,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:12:27,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:12:27,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:12:27,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:12:27,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:12:27,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:12:27,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:12:27,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:12:27,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:12:27,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:12:27,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:12:27,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:12:27,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:12:27,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:12:27,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:12:27,291 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:12:27,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:12:27,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:12:27,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:12:27,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:12:27,599 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:12:27,600 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:12:27,601 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2019-12-27 15:12:27,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578ae8efc/444b21307bf24372a5538f655ec342ee/FLAG4fa05e40c [2019-12-27 15:12:28,247 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:12:28,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2019-12-27 15:12:28,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578ae8efc/444b21307bf24372a5538f655ec342ee/FLAG4fa05e40c [2019-12-27 15:12:28,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578ae8efc/444b21307bf24372a5538f655ec342ee [2019-12-27 15:12:28,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:12:28,583 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:12:28,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:12:28,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:12:28,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:12:28,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:12:28" (1/1) ... [2019-12-27 15:12:28,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18df1330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:28, skipping insertion in model container [2019-12-27 15:12:28,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:12:28" (1/1) ... [2019-12-27 15:12:28,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:12:28,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:12:29,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:12:29,091 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:12:29,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:12:29,248 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:12:29,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29 WrapperNode [2019-12-27 15:12:29,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:12:29,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:12:29,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:12:29,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:12:29,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:12:29,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:12:29,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:12:29,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:12:29,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... [2019-12-27 15:12:29,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:12:29,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:12:29,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:12:29,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:12:29,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:12:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:12:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:12:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:12:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:12:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:12:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:12:29,396 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 15:12:29,763 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:12:29,763 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:12:29,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:12:29 BoogieIcfgContainer [2019-12-27 15:12:29,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:12:29,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:12:29,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:12:29,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:12:29,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:12:28" (1/3) ... [2019-12-27 15:12:29,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2337bb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:12:29, skipping insertion in model container [2019-12-27 15:12:29,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:29" (2/3) ... [2019-12-27 15:12:29,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2337bb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:12:29, skipping insertion in model container [2019-12-27 15:12:29,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:12:29" (3/3) ... [2019-12-27 15:12:29,772 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-27 15:12:29,782 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:12:29,783 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:12:29,788 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:12:29,789 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:12:29,811 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,812 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,812 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,812 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,812 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,815 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,815 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,815 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,815 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,816 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,816 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,816 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,816 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,816 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,817 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,817 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,817 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,817 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,817 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,821 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,823 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,844 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,844 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,845 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,845 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:29,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:12:29,881 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:12:29,881 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:12:29,881 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:12:29,882 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:12:29,882 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:12:29,882 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:12:29,882 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:12:29,882 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:12:29,896 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-27 15:12:29,898 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 15:12:29,937 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 15:12:29,938 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:12:29,948 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. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 15:12:29,952 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 15:12:29,984 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 15:12:29,984 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:12:29,985 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. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 15:12:29,988 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-27 15:12:29,989 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:12:31,121 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-27 15:12:31,259 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-27 15:12:31,259 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-27 15:12:31,263 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:12:31,272 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:12:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:12:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:12:31,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:31,282 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:12:31,283 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-27 15:12:31,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:31,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131854247] [2019-12-27 15:12:31,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:31,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131854247] [2019-12-27 15:12:31,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:31,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:12:31,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764555135] [2019-12-27 15:12:31,509 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:31,515 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:31,530 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:12:31,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:31,536 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:12:31,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:12:31,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:12:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:12:31,555 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:12:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:31,594 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-27 15:12:31,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:12:31,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:12:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:31,608 INFO L225 Difference]: With dead ends: 48 [2019-12-27 15:12:31,608 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:31,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:12:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 15:12:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-27 15:12:31,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-27 15:12:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:31,666 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-27 15:12:31,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:12:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-27 15:12:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:12:31,667 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:31,667 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:31,667 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-27 15:12:31,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:31,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244269999] [2019-12-27 15:12:31,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:31,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244269999] [2019-12-27 15:12:31,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:31,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:12:31,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1344607106] [2019-12-27 15:12:31,772 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:31,773 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:31,779 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:12:31,780 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:31,784 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:31,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:12:31,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:12:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:12:31,786 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-27 15:12:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:31,810 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:31,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:12:31,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:12:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:31,811 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:31,811 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 15:12:31,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:12:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 15:12:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 15:12:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 15:12:31,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-27 15:12:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:31,818 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 15:12:31,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:12:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 15:12:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:12:31,819 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:31,819 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:31,820 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-27 15:12:31,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:31,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121476623] [2019-12-27 15:12:31,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:31,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121476623] [2019-12-27 15:12:31,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:31,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:12:31,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [902877791] [2019-12-27 15:12:31,892 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:31,893 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:31,896 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:12:31,897 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:31,898 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:31,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:12:31,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:12:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:12:31,900 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-27 15:12:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:31,937 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:31,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:12:31,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:12:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:31,939 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:31,939 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:31,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:12:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-27 15:12:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 15:12:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 15:12:31,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-27 15:12:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:31,944 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 15:12:31,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:12:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 15:12:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:12:31,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:31,945 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:31,945 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-27 15:12:31,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:31,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158822706] [2019-12-27 15:12:31,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:32,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158822706] [2019-12-27 15:12:32,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:32,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:12:32,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1071094770] [2019-12-27 15:12:32,045 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:32,046 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:32,047 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:12:32,048 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:32,049 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:32,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:12:32,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:12:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:12:32,050 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-27 15:12:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:32,099 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 15:12:32,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:12:32,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:12:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:32,101 INFO L225 Difference]: With dead ends: 32 [2019-12-27 15:12:32,101 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:32,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:12:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 15:12:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 15:12:32,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-27 15:12:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:32,107 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 15:12:32,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:12:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 15:12:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:12:32,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:32,108 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:32,108 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-27 15:12:32,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:32,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459864452] [2019-12-27 15:12:32,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:32,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459864452] [2019-12-27 15:12:32,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550085558] [2019-12-27 15:12:32,189 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 [2019-12-27 15:12:32,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:12:32,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:32,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:12:32,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:32,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:32,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 15:12:32,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1022079308] [2019-12-27 15:12:32,287 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:32,288 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:32,290 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:12:32,290 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:32,293 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:32,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:12:32,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:12:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:12:32,294 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 6 states. [2019-12-27 15:12:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:32,347 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 15:12:32,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:12:32,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:12:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:32,348 INFO L225 Difference]: With dead ends: 32 [2019-12-27 15:12:32,349 INFO L226 Difference]: Without dead ends: 29 [2019-12-27 15:12:32,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-27 15:12:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-27 15:12:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 15:12:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 15:12:32,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-27 15:12:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:32,354 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 15:12:32,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:12:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 15:12:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:12:32,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:32,355 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:32,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:32,558 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-27 15:12:32,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:32,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340767178] [2019-12-27 15:12:32,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:32,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340767178] [2019-12-27 15:12:32,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171182416] [2019-12-27 15:12:32,628 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 [2019-12-27 15:12:32,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:32,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:32,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:12:32,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:32,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 15:12:32,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1539400636] [2019-12-27 15:12:32,716 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:32,716 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:32,719 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:12:32,720 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:32,724 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:32,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:12:32,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:12:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:12:32,725 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 6 states. [2019-12-27 15:12:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:32,805 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-27 15:12:32,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:12:32,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:12:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:32,806 INFO L225 Difference]: With dead ends: 33 [2019-12-27 15:12:32,806 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 15:12:32,806 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 15:12:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 15:12:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:32,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 15:12:32,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-27 15:12:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:32,812 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 15:12:32,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:12:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 15:12:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:12:32,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:32,813 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:33,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:33,017 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-27 15:12:33,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:33,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884351484] [2019-12-27 15:12:33,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:33,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884351484] [2019-12-27 15:12:33,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611815658] [2019-12-27 15:12:33,121 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 [2019-12-27 15:12:33,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:33,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:33,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:12:33,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:33,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:33,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:12:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487036226] [2019-12-27 15:12:33,198 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:33,199 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:33,201 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:12:33,201 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:33,203 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:33,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:12:33,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:12:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:12:33,204 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 7 states. [2019-12-27 15:12:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:33,313 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:33,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:12:33,314 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:12:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:33,314 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:33,315 INFO L226 Difference]: Without dead ends: 31 [2019-12-27 15:12:33,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-27 15:12:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-27 15:12:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-27 15:12:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-27 15:12:33,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-27 15:12:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:33,319 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-27 15:12:33,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:12:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-27 15:12:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:12:33,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:33,320 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:33,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:33,525 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-27 15:12:33,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:33,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596737913] [2019-12-27 15:12:33,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:33,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596737913] [2019-12-27 15:12:33,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572365683] [2019-12-27 15:12:33,608 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 [2019-12-27 15:12:33,660 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:12:33,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:33,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:12:33,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:33,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:33,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:12:33,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1672682788] [2019-12-27 15:12:33,689 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:33,690 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:33,692 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:12:33,693 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:33,694 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:33,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:12:33,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:33,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:12:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:12:33,695 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 7 states. [2019-12-27 15:12:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:33,797 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-27 15:12:33,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:12:33,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:12:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:33,798 INFO L225 Difference]: With dead ends: 35 [2019-12-27 15:12:33,798 INFO L226 Difference]: Without dead ends: 32 [2019-12-27 15:12:33,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-27 15:12:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-27 15:12:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 15:12:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 15:12:33,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-27 15:12:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:33,803 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 15:12:33,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:12:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 15:12:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:12:33,804 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:33,805 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:34,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:34,013 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-27 15:12:34,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:34,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659992473] [2019-12-27 15:12:34,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:34,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659992473] [2019-12-27 15:12:34,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444487670] [2019-12-27 15:12:34,094 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 [2019-12-27 15:12:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:34,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:12:34,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:34,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:34,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 15:12:34,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [94428182] [2019-12-27 15:12:34,159 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:34,159 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:34,161 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:12:34,161 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:34,163 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:34,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:34,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:34,164 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 8 states. [2019-12-27 15:12:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:34,254 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-27 15:12:34,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:12:34,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:12:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:34,256 INFO L225 Difference]: With dead ends: 36 [2019-12-27 15:12:34,256 INFO L226 Difference]: Without dead ends: 33 [2019-12-27 15:12:34,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-27 15:12:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-27 15:12:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-27 15:12:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-27 15:12:34,268 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-27 15:12:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:34,268 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-27 15:12:34,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-27 15:12:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:12:34,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:34,270 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:34,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:34,475 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-27 15:12:34,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:34,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431776042] [2019-12-27 15:12:34,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:34,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431776042] [2019-12-27 15:12:34,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51909121] [2019-12-27 15:12:34,540 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 [2019-12-27 15:12:34,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:34,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:34,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:12:34,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:34,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:34,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 15:12:34,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234741250] [2019-12-27 15:12:34,603 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:34,605 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:34,607 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:12:34,607 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:34,608 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:34,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:34,609 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 8 states. [2019-12-27 15:12:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:34,729 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-27 15:12:34,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:34,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:12:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:34,729 INFO L225 Difference]: With dead ends: 37 [2019-12-27 15:12:34,730 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 15:12:34,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 15:12:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-27 15:12:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 15:12:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 15:12:34,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-27 15:12:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:34,734 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 15:12:34,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 15:12:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:12:34,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:34,735 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:34,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:34,936 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-27 15:12:34,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:34,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76543031] [2019-12-27 15:12:34,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:35,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76543031] [2019-12-27 15:12:35,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898738441] [2019-12-27 15:12:35,003 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 [2019-12-27 15:12:35,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:12:35,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:35,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:12:35,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:35,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:35,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 15:12:35,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [59099635] [2019-12-27 15:12:35,078 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:35,079 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:35,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:12:35,081 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:35,083 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:35,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:12:35,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:12:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:35,084 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 9 states. [2019-12-27 15:12:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:35,189 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-27 15:12:35,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:35,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:12:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:35,190 INFO L225 Difference]: With dead ends: 38 [2019-12-27 15:12:35,190 INFO L226 Difference]: Without dead ends: 35 [2019-12-27 15:12:35,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:12:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-27 15:12:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-27 15:12:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-27 15:12:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-27 15:12:35,194 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-27 15:12:35,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:35,195 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-27 15:12:35,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:12:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-27 15:12:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:12:35,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:35,196 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:35,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:35,402 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-27 15:12:35,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:35,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873148249] [2019-12-27 15:12:35,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:35,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873148249] [2019-12-27 15:12:35,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218014916] [2019-12-27 15:12:35,471 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 [2019-12-27 15:12:35,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:35,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:35,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:12:35,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:35,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:35,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 15:12:35,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [358240684] [2019-12-27 15:12:35,584 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:35,585 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:35,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:12:35,588 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:35,589 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:35,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:12:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:12:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:35,591 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 9 states. [2019-12-27 15:12:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:35,727 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-27 15:12:35,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:12:35,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:12:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:35,728 INFO L225 Difference]: With dead ends: 39 [2019-12-27 15:12:35,728 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:12:35,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:12:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:12:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:12:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:12:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 15:12:35,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-27 15:12:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:35,733 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 15:12:35,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:12:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 15:12:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:35,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:35,734 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:35,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:35,943 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-27 15:12:35,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:35,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144869556] [2019-12-27 15:12:35,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:36,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144869556] [2019-12-27 15:12:36,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758750588] [2019-12-27 15:12:36,013 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:36,064 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:12:36,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:36,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:12:36,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:36,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:36,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 15:12:36,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1078934541] [2019-12-27 15:12:36,088 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:36,089 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:36,092 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:12:36,092 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:36,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:36,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:36,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:36,095 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 10 states. [2019-12-27 15:12:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:36,229 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-27 15:12:36,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:12:36,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:36,230 INFO L225 Difference]: With dead ends: 40 [2019-12-27 15:12:36,230 INFO L226 Difference]: Without dead ends: 37 [2019-12-27 15:12:36,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:12:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-27 15:12:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-27 15:12:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-27 15:12:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-27 15:12:36,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-27 15:12:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:36,234 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-27 15:12:36,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-27 15:12:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:36,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:36,235 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:36,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:36,439 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-27 15:12:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:36,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868979362] [2019-12-27 15:12:36,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:36,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868979362] [2019-12-27 15:12:36,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142132450] [2019-12-27 15:12:36,521 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 [2019-12-27 15:12:36,580 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:12:36,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:36,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:12:36,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:36,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 15:12:36,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1857738347] [2019-12-27 15:12:36,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:36,606 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:36,608 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:12:36,608 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:36,609 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:36,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:36,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:36,610 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 10 states. [2019-12-27 15:12:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:36,755 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-27 15:12:36,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:36,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:36,756 INFO L225 Difference]: With dead ends: 41 [2019-12-27 15:12:36,757 INFO L226 Difference]: Without dead ends: 38 [2019-12-27 15:12:36,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-27 15:12:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-27 15:12:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 15:12:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 15:12:36,761 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-27 15:12:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:36,762 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 15:12:36,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 15:12:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 15:12:36,762 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:36,763 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:36,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:36,971 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-27 15:12:36,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:36,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184854256] [2019-12-27 15:12:36,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:37,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184854256] [2019-12-27 15:12:37,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255933803] [2019-12-27 15:12:37,066 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 [2019-12-27 15:12:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:37,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:37,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:37,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 15:12:37,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394801538] [2019-12-27 15:12:37,164 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:37,166 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:37,171 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 15:12:37,171 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:37,173 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:37,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:12:37,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:12:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:37,175 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 11 states. [2019-12-27 15:12:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:37,325 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-27 15:12:37,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:37,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 15:12:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:37,326 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:12:37,326 INFO L226 Difference]: Without dead ends: 39 [2019-12-27 15:12:37,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:12:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-27 15:12:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-27 15:12:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-27 15:12:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-27 15:12:37,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-27 15:12:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:37,333 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-27 15:12:37,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:12:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-27 15:12:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 15:12:37,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:37,334 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:37,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:37,540 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-27 15:12:37,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:37,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380314463] [2019-12-27 15:12:37,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:37,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380314463] [2019-12-27 15:12:37,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784968056] [2019-12-27 15:12:37,623 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 [2019-12-27 15:12:37,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:37,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:37,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:37,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:37,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:37,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 15:12:37,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [219195136] [2019-12-27 15:12:37,693 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:37,694 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:37,697 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 15:12:37,697 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:37,698 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:37,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:12:37,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:37,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:12:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:37,699 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 11 states. [2019-12-27 15:12:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:37,863 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-27 15:12:37,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:12:37,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 15:12:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:37,864 INFO L225 Difference]: With dead ends: 43 [2019-12-27 15:12:37,864 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 15:12:37,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:12:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 15:12:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 15:12:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 15:12:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 15:12:37,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-27 15:12:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:37,869 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 15:12:37,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:12:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 15:12:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 15:12:37,869 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:37,870 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:38,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:38,073 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-27 15:12:38,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:38,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606569163] [2019-12-27 15:12:38,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:38,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606569163] [2019-12-27 15:12:38,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881641432] [2019-12-27 15:12:38,202 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 [2019-12-27 15:12:38,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 15:12:38,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:38,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:12:38,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:38,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:38,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 15:12:38,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [667878575] [2019-12-27 15:12:38,280 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:38,281 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:38,283 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 15:12:38,284 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:38,285 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:38,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 15:12:38,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 15:12:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:38,286 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 12 states. [2019-12-27 15:12:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:38,436 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-27 15:12:38,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:12:38,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 15:12:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:38,437 INFO L225 Difference]: With dead ends: 44 [2019-12-27 15:12:38,437 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:12:38,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:12:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:12:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-27 15:12:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 15:12:38,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-27 15:12:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:38,442 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 15:12:38,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 15:12:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 15:12:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 15:12:38,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:38,443 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:38,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:38,647 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-27 15:12:38,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:38,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284847658] [2019-12-27 15:12:38,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:38,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284847658] [2019-12-27 15:12:38,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044313136] [2019-12-27 15:12:38,738 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 [2019-12-27 15:12:38,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:38,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:38,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:12:38,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:38,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:38,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 15:12:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [188484944] [2019-12-27 15:12:38,809 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:38,810 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:38,813 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 15:12:38,813 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:38,815 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:38,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 15:12:38,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 15:12:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:38,816 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 12 states. [2019-12-27 15:12:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:38,984 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-27 15:12:38,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:12:38,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 15:12:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:38,990 INFO L225 Difference]: With dead ends: 45 [2019-12-27 15:12:38,991 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 15:12:38,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:12:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 15:12:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 15:12:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 15:12:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 15:12:39,002 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-27 15:12:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:39,002 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 15:12:39,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 15:12:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 15:12:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 15:12:39,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:39,003 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:39,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:39,207 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-27 15:12:39,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:39,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579884098] [2019-12-27 15:12:39,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:39,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579884098] [2019-12-27 15:12:39,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748717810] [2019-12-27 15:12:39,317 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 [2019-12-27 15:12:39,373 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 15:12:39,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:39,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:12:39,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:39,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:39,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 15:12:39,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [423605507] [2019-12-27 15:12:39,405 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:39,406 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:39,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 15:12:39,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:39,415 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:39,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 15:12:39,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 15:12:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:39,416 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 13 states. [2019-12-27 15:12:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:39,643 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-27 15:12:39,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:12:39,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 15:12:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:39,644 INFO L225 Difference]: With dead ends: 46 [2019-12-27 15:12:39,644 INFO L226 Difference]: Without dead ends: 43 [2019-12-27 15:12:39,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:12:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-27 15:12:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-27 15:12:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 15:12:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-27 15:12:39,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-27 15:12:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:39,648 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-27 15:12:39,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 15:12:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-27 15:12:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 15:12:39,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:39,649 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:39,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:39,850 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-27 15:12:39,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:39,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074580661] [2019-12-27 15:12:39,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:39,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074580661] [2019-12-27 15:12:39,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382452181] [2019-12-27 15:12:39,962 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 [2019-12-27 15:12:40,024 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 15:12:40,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:40,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:12:40,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:40,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:40,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 15:12:40,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317549552] [2019-12-27 15:12:40,052 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:40,054 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:40,057 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 15:12:40,057 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:40,058 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:40,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 15:12:40,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:40,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 15:12:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:40,059 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 13 states. [2019-12-27 15:12:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:40,265 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-27 15:12:40,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:12:40,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 15:12:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:40,266 INFO L225 Difference]: With dead ends: 47 [2019-12-27 15:12:40,266 INFO L226 Difference]: Without dead ends: 44 [2019-12-27 15:12:40,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:12:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-27 15:12:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-27 15:12:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 15:12:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 15:12:40,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-27 15:12:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:40,269 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 15:12:40,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 15:12:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 15:12:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 15:12:40,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:40,270 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:40,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:40,473 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-27 15:12:40,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:40,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952158393] [2019-12-27 15:12:40,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:40,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952158393] [2019-12-27 15:12:40,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032778301] [2019-12-27 15:12:40,562 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 [2019-12-27 15:12:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:40,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:12:40,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:40,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:12:40,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-27 15:12:40,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1571766199] [2019-12-27 15:12:40,635 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:40,637 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:40,640 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 15:12:40,640 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:40,642 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:12:40,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:40,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:40,643 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-12-27 15:12:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:40,660 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-12-27 15:12:40,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:40,661 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-27 15:12:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:40,661 INFO L225 Difference]: With dead ends: 96 [2019-12-27 15:12:40,661 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 15:12:40,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 15:12:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 15:12:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-12-27 15:12:40,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-12-27 15:12:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:40,664 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-12-27 15:12:40,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-12-27 15:12:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 15:12:40,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:40,665 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:40,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:40,865 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-27 15:12:40,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:40,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468904343] [2019-12-27 15:12:40,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:40,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468904343] [2019-12-27 15:12:40,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394662676] [2019-12-27 15:12:40,978 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 [2019-12-27 15:12:41,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:41,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:41,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:12:41,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:41,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:12:41,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2019-12-27 15:12:41,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1139471822] [2019-12-27 15:12:41,129 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:41,130 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:41,133 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 15:12:41,133 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:41,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:41,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:41,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:12:41,136 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-12-27 15:12:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:41,150 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-27 15:12:41,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:41,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-27 15:12:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:41,152 INFO L225 Difference]: With dead ends: 46 [2019-12-27 15:12:41,152 INFO L226 Difference]: Without dead ends: 0 [2019-12-27 15:12:41,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:12:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-27 15:12:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-27 15:12:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-27 15:12:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-27 15:12:41,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-27 15:12:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:41,154 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-27 15:12:41,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-27 15:12:41,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-27 15:12:41,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:41,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:12:41 BasicIcfg [2019-12-27 15:12:41,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:12:41,363 INFO L168 Benchmark]: Toolchain (without parser) took 12779.87 ms. Allocated memory was 138.4 MB in the beginning and 308.8 MB in the end (delta: 170.4 MB). Free memory was 102.1 MB in the beginning and 112.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 159.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,364 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.20 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.7 MB in the beginning and 162.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.49 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,365 INFO L168 Benchmark]: Boogie Preprocessor took 27.34 ms. Allocated memory is still 202.9 MB. Free memory was 160.3 MB in the beginning and 159.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,366 INFO L168 Benchmark]: RCFGBuilder took 439.14 ms. Allocated memory is still 202.9 MB. Free memory was 159.0 MB in the beginning and 139.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,366 INFO L168 Benchmark]: TraceAbstraction took 11595.84 ms. Allocated memory was 202.9 MB in the beginning and 308.8 MB in the end (delta: 105.9 MB). Free memory was 138.6 MB in the beginning and 112.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:41,369 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 665.20 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.7 MB in the beginning and 162.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.49 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.34 ms. Allocated memory is still 202.9 MB. Free memory was 160.3 MB in the beginning and 159.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.14 ms. Allocated memory is still 202.9 MB. Free memory was 159.0 MB in the beginning and 139.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11595.84 ms. Allocated memory was 202.9 MB in the beginning and 308.8 MB in the end (delta: 105.9 MB). Free memory was 138.6 MB in the beginning and 112.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 131.8 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: 11.4s, OverallIterations: 22, TraceHistogramMax: 6, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 241 SDtfs, 527 SDslu, 391 SDs, 0 SdLazy, 445 SolverSat, 349 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 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, 2.0s 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...