/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-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 04:44:12,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:44:12,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:44:12,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:44:12,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:44:12,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:44:12,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:44:12,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:44:13,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:44:13,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:44:13,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:44:13,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:44:13,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:44:13,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:44:13,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:44:13,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:44:13,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:44:13,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:44:13,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:44:13,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 04:44:13,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 04:44:13,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:44:13,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:44:13,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:44:13,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 04:44:13,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 04:44:13,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 04:44:13,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 04:44:13,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 04:44:13,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 04:44:13,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:44:13,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:44:13,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:44:13,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:44:13,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:44:13,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:44:13,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:44:13,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:44:13,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:44:13,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:44:13,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:44:13,042 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-VariableLbe.epf [2019-12-27 04:44:13,056 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:44:13,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:44:13,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:44:13,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:44:13,058 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:44:13,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:44:13,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:44:13,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:44:13,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:44:13,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:44:13,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:44:13,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:44:13,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:44:13,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:44:13,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:44:13,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:44:13,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:44:13,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:44:13,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:44:13,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:44:13,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:44:13,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:44:13,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:44:13,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:44:13,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:44:13,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:44:13,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:44:13,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:44:13,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:44:13,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:44:13,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:44:13,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:44:13,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:44:13,359 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:44:13,360 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:44:13,361 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 04:44:13,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d0e7072/5c863b6c5dd24c94a12f983bdd0f6343/FLAG29785bd12 [2019-12-27 04:44:13,968 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:44:13,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 04:44:13,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d0e7072/5c863b6c5dd24c94a12f983bdd0f6343/FLAG29785bd12 [2019-12-27 04:44:14,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d0e7072/5c863b6c5dd24c94a12f983bdd0f6343 [2019-12-27 04:44:14,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:44:14,267 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:44:14,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:44:14,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:44:14,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:44:14,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:14,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4474ebaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14, skipping insertion in model container [2019-12-27 04:44:14,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:14,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:44:14,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:44:14,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:44:14,814 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:44:14,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:44:14,968 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:44:14,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14 WrapperNode [2019-12-27 04:44:14,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:44:14,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:44:14,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:44:14,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:44:14,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:14,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:44:15,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:44:15,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:44:15,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:44:15,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (1/1) ... [2019-12-27 04:44:15,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:44:15,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:44:15,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:44:15,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:44:15,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (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 04:44:15,104 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:44:15,105 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:44:15,105 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:44:15,105 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:44:15,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:44:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:44:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:44:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:44:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:44:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:44:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:44:15,108 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 04:44:15,433 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:44:15,433 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:44:15,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:44:15 BoogieIcfgContainer [2019-12-27 04:44:15,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:44:15,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:44:15,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:44:15,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:44:15,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:44:14" (1/3) ... [2019-12-27 04:44:15,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74381605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:44:15, skipping insertion in model container [2019-12-27 04:44:15,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:44:14" (2/3) ... [2019-12-27 04:44:15,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74381605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:44:15, skipping insertion in model container [2019-12-27 04:44:15,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:44:15" (3/3) ... [2019-12-27 04:44:15,443 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-27 04:44:15,453 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:44:15,453 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:44:15,459 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:44:15,459 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:44:15,487 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,487 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,487 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,489 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,490 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,490 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,491 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,491 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,491 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,492 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,492 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,492 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,492 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,493 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,493 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,494 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,494 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,494 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,494 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,495 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,496 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,499 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,499 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,499 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,499 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,500 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,504 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,505 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,507 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,507 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,507 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,507 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,515 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,516 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,516 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,516 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,516 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,517 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:44:15,532 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:44:15,549 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:44:15,549 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:44:15,549 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:44:15,549 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:44:15,549 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:44:15,549 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:44:15,550 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:44:15,550 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:44:15,560 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-27 04:44:15,562 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 04:44:15,603 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 04:44:15,603 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:44:15,611 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 04:44:15,618 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 04:44:15,637 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 04:44:15,637 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:44:15,639 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 04:44:15,642 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-27 04:44:15,645 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:44:16,707 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-27 04:44:16,817 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-27 04:44:16,817 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-27 04:44:16,821 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:44:16,832 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:44:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:44:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:44:16,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:16,842 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:44:16,843 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:16,851 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-27 04:44:16,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:16,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785649932] [2019-12-27 04:44:16,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:17,051 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 04:44:17,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785649932] [2019-12-27 04:44:17,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:44:17,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:44:17,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243832698] [2019-12-27 04:44:17,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:44:17,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:44:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:44:17,079 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:44:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:17,115 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-27 04:44:17,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:44:17,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:44:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:17,129 INFO L225 Difference]: With dead ends: 48 [2019-12-27 04:44:17,130 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 04:44:17,131 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 04:44:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 04:44:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 04:44:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 04:44:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-27 04:44:17,171 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-27 04:44:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:17,172 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-27 04:44:17,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:44:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-27 04:44:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:44:17,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:17,173 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:17,174 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-27 04:44:17,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:17,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607740608] [2019-12-27 04:44:17,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:17,252 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 04:44:17,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607740608] [2019-12-27 04:44:17,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:44:17,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:44:17,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768605589] [2019-12-27 04:44:17,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:44:17,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:44:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:44:17,256 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-27 04:44:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:17,276 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 04:44:17,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:44:17,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:44:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:17,277 INFO L225 Difference]: With dead ends: 34 [2019-12-27 04:44:17,278 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 04:44:17,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:44:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 04:44:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 04:44:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 04:44:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 04:44:17,285 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-27 04:44:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:17,299 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 04:44:17,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:44:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 04:44:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:44:17,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:17,300 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:17,300 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-27 04:44:17,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:17,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628859306] [2019-12-27 04:44:17,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:17,425 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 04:44:17,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628859306] [2019-12-27 04:44:17,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:44:17,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:44:17,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085438267] [2019-12-27 04:44:17,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:44:17,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:44:17,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:44:17,428 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-27 04:44:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:17,462 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 04:44:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:44:17,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:44:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:17,463 INFO L225 Difference]: With dead ends: 34 [2019-12-27 04:44:17,463 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 04:44:17,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 04:44:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 04:44:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-27 04:44:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 04:44:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 04:44:17,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-27 04:44:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:17,470 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 04:44:17,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:44:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 04:44:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:44:17,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:17,471 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:17,471 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-27 04:44:17,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:17,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813888939] [2019-12-27 04:44:17,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:17,528 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 04:44:17,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813888939] [2019-12-27 04:44:17,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:44:17,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:44:17,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539244736] [2019-12-27 04:44:17,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:44:17,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:17,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:44:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:44:17,530 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-27 04:44:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:17,570 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 04:44:17,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:44:17,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:44:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:17,572 INFO L225 Difference]: With dead ends: 32 [2019-12-27 04:44:17,572 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 04:44:17,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 04:44:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 04:44:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 04:44:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 04:44:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 04:44:17,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-27 04:44:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:17,578 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 04:44:17,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:44:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 04:44:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:44:17,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:17,579 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:17,580 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:17,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-27 04:44:17,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:17,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878037607] [2019-12-27 04:44:17,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:17,665 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 04:44:17,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878037607] [2019-12-27 04:44:17,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620493890] [2019-12-27 04:44:17,667 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 04:44:17,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:44:17,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:17,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:44:17,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:17,797 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 04:44:17,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:17,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 04:44:17,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531058053] [2019-12-27 04:44:17,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 04:44:17,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 04:44:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:44:17,803 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-27 04:44:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:17,853 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 04:44:17,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:44:17,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 04:44:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:17,855 INFO L225 Difference]: With dead ends: 32 [2019-12-27 04:44:17,855 INFO L226 Difference]: Without dead ends: 29 [2019-12-27 04:44:17,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-12-27 04:44:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-27 04:44:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-27 04:44:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 04:44:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 04:44:17,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-27 04:44:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:17,862 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 04:44:17,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 04:44:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 04:44:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:44:17,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:17,863 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:18,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:18,068 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-27 04:44:18,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:18,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044845108] [2019-12-27 04:44:18,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:18,138 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 04:44:18,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044845108] [2019-12-27 04:44:18,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544791791] [2019-12-27 04:44:18,139 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 04:44:18,195 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:18,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:18,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:44:18,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:18,215 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 04:44:18,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:18,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 04:44:18,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892223123] [2019-12-27 04:44:18,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 04:44:18,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 04:44:18,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:44:18,217 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-27 04:44:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:18,288 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-27 04:44:18,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:44:18,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 04:44:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:18,292 INFO L225 Difference]: With dead ends: 33 [2019-12-27 04:44:18,292 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 04:44:18,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:44:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 04:44:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 04:44:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 04:44:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 04:44:18,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-27 04:44:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:18,302 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 04:44:18,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 04:44:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 04:44:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:44:18,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:18,306 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:18,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:18,510 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-27 04:44:18,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:18,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940049993] [2019-12-27 04:44:18,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:18,592 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 04:44:18,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940049993] [2019-12-27 04:44:18,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741173302] [2019-12-27 04:44:18,593 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 04:44:18,648 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:18,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:18,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:44:18,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:18,677 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 04:44:18,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:18,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 04:44:18,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324465200] [2019-12-27 04:44:18,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:44:18,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:44:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:44:18,679 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-27 04:44:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:18,783 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 04:44:18,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:44:18,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 04:44:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:18,785 INFO L225 Difference]: With dead ends: 34 [2019-12-27 04:44:18,785 INFO L226 Difference]: Without dead ends: 31 [2019-12-27 04:44:18,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:44:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-27 04:44:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-27 04:44:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-27 04:44:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-27 04:44:18,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-27 04:44:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:18,790 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-27 04:44:18,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:44:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-27 04:44:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:44:18,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:18,791 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:18,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:18,995 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-27 04:44:18,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:18,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237579981] [2019-12-27 04:44:18,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:19,076 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 04:44:19,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237579981] [2019-12-27 04:44:19,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301296235] [2019-12-27 04:44:19,077 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 04:44:19,125 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:44:19,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:19,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:44:19,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:19,147 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 04:44:19,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:19,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 04:44:19,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30434592] [2019-12-27 04:44:19,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:44:19,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:44:19,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:44:19,149 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-27 04:44:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:19,265 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-27 04:44:19,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:44:19,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 04:44:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:19,266 INFO L225 Difference]: With dead ends: 35 [2019-12-27 04:44:19,266 INFO L226 Difference]: Without dead ends: 32 [2019-12-27 04:44:19,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 04:44:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-27 04:44:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-27 04:44:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 04:44:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 04:44:19,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-27 04:44:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:19,271 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 04:44:19,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:44:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 04:44:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:44:19,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:19,272 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:19,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:19,480 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-27 04:44:19,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:19,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346961007] [2019-12-27 04:44:19,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:19,559 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 04:44:19,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346961007] [2019-12-27 04:44:19,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57045995] [2019-12-27 04:44:19,563 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:44:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:19,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:44:19,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:19,639 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 04:44:19,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:19,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 04:44:19,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097213282] [2019-12-27 04:44:19,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:44:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:44:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 04:44:19,641 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-27 04:44:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:19,727 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-27 04:44:19,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:44:19,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 04:44:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:19,728 INFO L225 Difference]: With dead ends: 36 [2019-12-27 04:44:19,728 INFO L226 Difference]: Without dead ends: 33 [2019-12-27 04:44:19,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:44:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-27 04:44:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-27 04:44:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-27 04:44:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-27 04:44:19,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-27 04:44:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:19,733 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-27 04:44:19,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:44:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-27 04:44:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:44:19,733 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:19,734 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:19,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:19,937 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:19,938 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-27 04:44:19,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:19,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439216762] [2019-12-27 04:44:19,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:20,023 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 04:44:20,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439216762] [2019-12-27 04:44:20,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740761259] [2019-12-27 04:44:20,024 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 04:44:20,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:20,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:20,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:44:20,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:20,078 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 04:44:20,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:20,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 04:44:20,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969831244] [2019-12-27 04:44:20,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:44:20,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:44:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 04:44:20,082 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-27 04:44:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:20,194 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-27 04:44:20,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:44:20,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 04:44:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:20,195 INFO L225 Difference]: With dead ends: 37 [2019-12-27 04:44:20,195 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 04:44:20,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:44:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 04:44:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-27 04:44:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 04:44:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 04:44:20,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-27 04:44:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:20,201 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 04:44:20,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:44:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 04:44:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:44:20,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:20,202 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:20,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:20,406 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-27 04:44:20,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:20,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63568396] [2019-12-27 04:44:20,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:20,487 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 04:44:20,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63568396] [2019-12-27 04:44:20,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414800109] [2019-12-27 04:44:20,488 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 04:44:20,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:44:20,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:20,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:44:20,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:20,580 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 04:44:20,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:20,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 04:44:20,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663146282] [2019-12-27 04:44:20,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:44:20,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:44:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:44:20,582 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-27 04:44:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:20,716 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-27 04:44:20,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:44:20,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 04:44:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:20,719 INFO L225 Difference]: With dead ends: 38 [2019-12-27 04:44:20,720 INFO L226 Difference]: Without dead ends: 35 [2019-12-27 04:44:20,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:44:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-27 04:44:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-27 04:44:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-27 04:44:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-27 04:44:20,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-27 04:44:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:20,726 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-27 04:44:20,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:44:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-27 04:44:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:44:20,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:20,727 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:20,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:20,933 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-27 04:44:20,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:20,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680515996] [2019-12-27 04:44:20,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:20,998 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 04:44:20,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680515996] [2019-12-27 04:44:20,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026071748] [2019-12-27 04:44:20,998 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 04:44:21,054 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:21,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:21,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:44:21,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:21,083 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 04:44:21,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:21,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 04:44:21,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608813801] [2019-12-27 04:44:21,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:44:21,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:44:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:44:21,085 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-27 04:44:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:21,211 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-27 04:44:21,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:44:21,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 04:44:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:21,212 INFO L225 Difference]: With dead ends: 39 [2019-12-27 04:44:21,213 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:44:21,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:44:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:44:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:44:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:44:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 04:44:21,217 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-27 04:44:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:21,217 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 04:44:21,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:44:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 04:44:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:44:21,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:21,218 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:21,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:21,425 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-27 04:44:21,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:21,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367456162] [2019-12-27 04:44:21,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:21,500 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 04:44:21,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367456162] [2019-12-27 04:44:21,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849368244] [2019-12-27 04:44:21,501 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 04:44:21,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:44:21,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:21,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:44:21,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:21,575 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 04:44:21,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:21,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 04:44:21,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316995468] [2019-12-27 04:44:21,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 04:44:21,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 04:44:21,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 04:44:21,577 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-27 04:44:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:21,713 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-27 04:44:21,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:44:21,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 04:44:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:21,714 INFO L225 Difference]: With dead ends: 40 [2019-12-27 04:44:21,714 INFO L226 Difference]: Without dead ends: 37 [2019-12-27 04:44:21,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:44:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-27 04:44:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-27 04:44:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-27 04:44:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-27 04:44:21,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-27 04:44:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:21,718 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-27 04:44:21,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 04:44:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-27 04:44:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:44:21,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:21,719 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:21,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:21,926 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-27 04:44:21,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:21,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277805139] [2019-12-27 04:44:21,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:22,002 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 04:44:22,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277805139] [2019-12-27 04:44:22,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132409034] [2019-12-27 04:44:22,003 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:44:22,052 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:44:22,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:22,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:44:22,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:22,070 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 04:44:22,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:22,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 04:44:22,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835744244] [2019-12-27 04:44:22,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 04:44:22,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 04:44:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 04:44:22,073 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-27 04:44:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:22,236 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-27 04:44:22,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:44:22,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 04:44:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:22,242 INFO L225 Difference]: With dead ends: 41 [2019-12-27 04:44:22,242 INFO L226 Difference]: Without dead ends: 38 [2019-12-27 04:44:22,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:44:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-27 04:44:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-27 04:44:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 04:44:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 04:44:22,246 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-27 04:44:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:22,247 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 04:44:22,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 04:44:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 04:44:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:44:22,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:22,248 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:22,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:22,455 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-27 04:44:22,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:22,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903022350] [2019-12-27 04:44:22,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:22,549 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 04:44:22,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903022350] [2019-12-27 04:44:22,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959446734] [2019-12-27 04:44:22,550 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 04:44:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:22,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:44:22,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:22,639 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 04:44:22,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:22,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 04:44:22,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677454500] [2019-12-27 04:44:22,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:44:22,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:22,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:44:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:44:22,642 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-27 04:44:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:22,826 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-27 04:44:22,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:44:22,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 04:44:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:22,827 INFO L225 Difference]: With dead ends: 42 [2019-12-27 04:44:22,827 INFO L226 Difference]: Without dead ends: 39 [2019-12-27 04:44:22,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:44:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-27 04:44:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-27 04:44:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-27 04:44:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-27 04:44:22,834 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-27 04:44:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:22,835 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-27 04:44:22,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:44:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-27 04:44:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:44:22,835 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:22,836 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:23,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:23,040 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-27 04:44:23,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:23,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943020443] [2019-12-27 04:44:23,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:23,132 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 04:44:23,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943020443] [2019-12-27 04:44:23,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947189757] [2019-12-27 04:44:23,132 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 04:44:23,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:23,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:23,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:44:23,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:23,201 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 04:44:23,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:23,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 04:44:23,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160553435] [2019-12-27 04:44:23,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:44:23,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:44:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:44:23,203 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-27 04:44:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:23,380 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-27 04:44:23,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:44:23,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 04:44:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:23,382 INFO L225 Difference]: With dead ends: 43 [2019-12-27 04:44:23,382 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 04:44:23,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:44:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 04:44:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 04:44:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 04:44:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 04:44:23,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-27 04:44:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:23,387 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 04:44:23,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:44:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 04:44:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 04:44:23,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:23,388 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:23,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:23,596 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:23,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-27 04:44:23,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:23,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454520485] [2019-12-27 04:44:23,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:23,697 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 04:44:23,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454520485] [2019-12-27 04:44:23,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659460778] [2019-12-27 04:44:23,698 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 04:44:23,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 04:44:23,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:23,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:44:23,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:23,782 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 04:44:23,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:23,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 04:44:23,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897758] [2019-12-27 04:44:23,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 04:44:23,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:23,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 04:44:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:44:23,785 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-27 04:44:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:23,968 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-27 04:44:23,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:44:23,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 04:44:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:23,974 INFO L225 Difference]: With dead ends: 44 [2019-12-27 04:44:23,974 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 04:44:23,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:44:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 04:44:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-27 04:44:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 04:44:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 04:44:23,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-27 04:44:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:23,978 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 04:44:23,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 04:44:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 04:44:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 04:44:23,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:23,979 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:24,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:24,189 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-27 04:44:24,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:24,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561080491] [2019-12-27 04:44:24,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:24,311 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 04:44:24,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561080491] [2019-12-27 04:44:24,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556620457] [2019-12-27 04:44:24,312 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 04:44:24,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:24,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:24,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:44:24,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:24,461 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 04:44:24,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:24,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 04:44:24,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405268631] [2019-12-27 04:44:24,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 04:44:24,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:24,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 04:44:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:44:24,463 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-27 04:44:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:24,671 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-27 04:44:24,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:44:24,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 04:44:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:24,672 INFO L225 Difference]: With dead ends: 45 [2019-12-27 04:44:24,672 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 04:44:24,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:44:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 04:44:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 04:44:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 04:44:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 04:44:24,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-27 04:44:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:24,678 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 04:44:24,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 04:44:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 04:44:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 04:44:24,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:24,684 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:24,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:24,888 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-27 04:44:24,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:24,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712353604] [2019-12-27 04:44:24,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:24,984 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 04:44:24,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712353604] [2019-12-27 04:44:24,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545573824] [2019-12-27 04:44:24,984 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 04:44:25,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 04:44:25,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:25,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 04:44:25,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:25,059 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 04:44:25,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:25,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 04:44:25,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821055134] [2019-12-27 04:44:25,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:44:25,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:44:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:44:25,061 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-27 04:44:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:25,314 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-27 04:44:25,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:44:25,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 04:44:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:25,315 INFO L225 Difference]: With dead ends: 46 [2019-12-27 04:44:25,316 INFO L226 Difference]: Without dead ends: 43 [2019-12-27 04:44:25,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:44:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-27 04:44:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-27 04:44:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 04:44:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-27 04:44:25,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-27 04:44:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:25,320 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-27 04:44:25,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:44:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-27 04:44:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 04:44:25,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:25,321 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:25,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:25,524 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-27 04:44:25,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:25,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589594357] [2019-12-27 04:44:25,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:25,653 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 04:44:25,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589594357] [2019-12-27 04:44:25,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150318263] [2019-12-27 04:44:25,654 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 04:44:25,716 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 04:44:25,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:25,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 04:44:25,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:25,736 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 04:44:25,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:25,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 04:44:25,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933400745] [2019-12-27 04:44:25,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:44:25,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:44:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:44:25,738 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-27 04:44:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:25,933 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-27 04:44:25,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:44:25,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 04:44:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:25,934 INFO L225 Difference]: With dead ends: 47 [2019-12-27 04:44:25,934 INFO L226 Difference]: Without dead ends: 44 [2019-12-27 04:44:25,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:44:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-27 04:44:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-27 04:44:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 04:44:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 04:44:25,939 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-27 04:44:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:25,939 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 04:44:25,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:44:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 04:44:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 04:44:25,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:25,940 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:26,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:26,143 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-27 04:44:26,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:26,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776266106] [2019-12-27 04:44:26,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:26,245 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 04:44:26,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776266106] [2019-12-27 04:44:26,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700236104] [2019-12-27 04:44:26,246 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 04:44:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:26,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 04:44:26,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:26,328 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 04:44:26,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:26,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 04:44:26,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227877498] [2019-12-27 04:44:26,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 04:44:26,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 04:44:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:44:26,330 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 15 states. [2019-12-27 04:44:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:26,538 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-27 04:44:26,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:44:26,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 04:44:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:26,539 INFO L225 Difference]: With dead ends: 48 [2019-12-27 04:44:26,540 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 04:44:26,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:44:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 04:44:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-27 04:44:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 04:44:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 04:44:26,543 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-27 04:44:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:26,543 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 04:44:26,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 04:44:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 04:44:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 04:44:26,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:26,544 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:26,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:26,748 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-27 04:44:26,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:26,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281853237] [2019-12-27 04:44:26,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:26,866 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 04:44:26,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281853237] [2019-12-27 04:44:26,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157354198] [2019-12-27 04:44:26,867 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 04:44:26,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:26,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:26,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 04:44:26,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:26,944 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 04:44:26,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:26,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 04:44:26,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193923609] [2019-12-27 04:44:26,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 04:44:26,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 04:44:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:44:26,946 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-12-27 04:44:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:27,197 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-27 04:44:27,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:44:27,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 04:44:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:27,198 INFO L225 Difference]: With dead ends: 49 [2019-12-27 04:44:27,198 INFO L226 Difference]: Without dead ends: 46 [2019-12-27 04:44:27,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:44:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-27 04:44:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-27 04:44:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 04:44:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 04:44:27,205 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-27 04:44:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:27,205 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 04:44:27,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 04:44:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 04:44:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 04:44:27,206 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:27,206 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:27,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:27,407 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-27 04:44:27,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:27,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710369439] [2019-12-27 04:44:27,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:27,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710369439] [2019-12-27 04:44:27,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255349567] [2019-12-27 04:44:27,511 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:27,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 04:44:27,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:27,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 04:44:27,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:27,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:27,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 04:44:27,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35796418] [2019-12-27 04:44:27,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:44:27,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:44:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:44:27,597 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 16 states. [2019-12-27 04:44:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:27,871 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-27 04:44:27,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:44:27,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 04:44:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:27,872 INFO L225 Difference]: With dead ends: 50 [2019-12-27 04:44:27,872 INFO L226 Difference]: Without dead ends: 47 [2019-12-27 04:44:27,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:44:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-27 04:44:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-27 04:44:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-27 04:44:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-27 04:44:27,876 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-27 04:44:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:27,877 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-27 04:44:27,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:44:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-27 04:44:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 04:44:27,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:27,878 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:28,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:28,081 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-27 04:44:28,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:28,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826600227] [2019-12-27 04:44:28,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:28,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826600227] [2019-12-27 04:44:28,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158311996] [2019-12-27 04:44:28,194 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:28,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:28,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:28,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 04:44:28,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:28,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:28,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 04:44:28,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359901180] [2019-12-27 04:44:28,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:44:28,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:44:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:44:28,290 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 16 states. [2019-12-27 04:44:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:28,554 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-27 04:44:28,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:44:28,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 04:44:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:28,555 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:44:28,556 INFO L226 Difference]: Without dead ends: 48 [2019-12-27 04:44:28,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:44:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-27 04:44:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-27 04:44:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 04:44:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 04:44:28,559 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-27 04:44:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:28,560 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 04:44:28,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:44:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 04:44:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 04:44:28,560 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:28,560 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:28,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:28,764 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-27 04:44:28,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:28,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306917209] [2019-12-27 04:44:28,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:28,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306917209] [2019-12-27 04:44:28,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324882743] [2019-12-27 04:44:28,892 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:28,939 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-27 04:44:28,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:28,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 04:44:28,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:28,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:28,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 04:44:28,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170006540] [2019-12-27 04:44:28,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 04:44:28,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 04:44:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:44:28,969 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 17 states. [2019-12-27 04:44:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:29,237 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-27 04:44:29,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:44:29,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 04:44:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:29,239 INFO L225 Difference]: With dead ends: 52 [2019-12-27 04:44:29,239 INFO L226 Difference]: Without dead ends: 49 [2019-12-27 04:44:29,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:44:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-27 04:44:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-27 04:44:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 04:44:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 04:44:29,243 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-27 04:44:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:29,243 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 04:44:29,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 04:44:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 04:44:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 04:44:29,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:29,244 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:29,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:29,447 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-27 04:44:29,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:29,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091828457] [2019-12-27 04:44:29,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:29,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091828457] [2019-12-27 04:44:29,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155478885] [2019-12-27 04:44:29,568 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:29,622 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 04:44:29,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:29,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 04:44:29,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:29,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:29,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 04:44:29,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056361150] [2019-12-27 04:44:29,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 04:44:29,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 04:44:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:44:29,645 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 17 states. [2019-12-27 04:44:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:29,928 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-27 04:44:29,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:44:29,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 04:44:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:29,930 INFO L225 Difference]: With dead ends: 53 [2019-12-27 04:44:29,930 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:44:29,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:44:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:44:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 04:44:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:44:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 04:44:29,934 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-27 04:44:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:29,934 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 04:44:29,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 04:44:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 04:44:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 04:44:29,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:29,935 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:30,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:30,138 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-27 04:44:30,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:30,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15329541] [2019-12-27 04:44:30,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:30,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15329541] [2019-12-27 04:44:30,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65031028] [2019-12-27 04:44:30,270 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:30,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 04:44:30,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 04:44:30,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012290852] [2019-12-27 04:44:30,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:44:30,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:44:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:44:30,336 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 18 states. [2019-12-27 04:44:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:30,640 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-27 04:44:30,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:44:30,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-27 04:44:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:30,642 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:44:30,642 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 04:44:30,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:44:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 04:44:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-27 04:44:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-27 04:44:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-27 04:44:30,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-27 04:44:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:30,645 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-27 04:44:30,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:44:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-27 04:44:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 04:44:30,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:30,646 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:30,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:30,849 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-27 04:44:30,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:30,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025535351] [2019-12-27 04:44:30,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:30,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025535351] [2019-12-27 04:44:30,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668399099] [2019-12-27 04:44:30,982 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:31,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:31,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:31,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 04:44:31,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:31,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:31,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 04:44:31,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32931140] [2019-12-27 04:44:31,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:44:31,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:44:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:44:31,052 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 18 states. [2019-12-27 04:44:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:31,350 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-27 04:44:31,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:44:31,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-27 04:44:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:31,352 INFO L225 Difference]: With dead ends: 55 [2019-12-27 04:44:31,352 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 04:44:31,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:44:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 04:44:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 04:44:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 04:44:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 04:44:31,356 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-27 04:44:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:31,356 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 04:44:31,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:44:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 04:44:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 04:44:31,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:31,357 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:31,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:31,561 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-27 04:44:31,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:31,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497074934] [2019-12-27 04:44:31,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:31,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497074934] [2019-12-27 04:44:31,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069658798] [2019-12-27 04:44:31,943 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:32,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-27 04:44:32,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:32,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 04:44:32,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:32,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:32,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 04:44:32,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867904296] [2019-12-27 04:44:32,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 04:44:32,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 04:44:32,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:44:32,066 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 19 states. [2019-12-27 04:44:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:32,418 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-27 04:44:32,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:44:32,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-27 04:44:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:32,420 INFO L225 Difference]: With dead ends: 56 [2019-12-27 04:44:32,420 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 04:44:32,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:44:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 04:44:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-27 04:44:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 04:44:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 04:44:32,424 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-27 04:44:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:32,424 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 04:44:32,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 04:44:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 04:44:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 04:44:32,424 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:32,425 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:32,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:32,628 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-27 04:44:32,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:32,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263157905] [2019-12-27 04:44:32,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:32,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263157905] [2019-12-27 04:44:32,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335027188] [2019-12-27 04:44:32,766 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:32,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:32,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:32,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 04:44:32,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:32,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:32,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 04:44:32,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418498622] [2019-12-27 04:44:32,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 04:44:32,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 04:44:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:44:32,840 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-12-27 04:44:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:33,178 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-27 04:44:33,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:44:33,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-27 04:44:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:33,179 INFO L225 Difference]: With dead ends: 57 [2019-12-27 04:44:33,179 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 04:44:33,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:44:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 04:44:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 04:44:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 04:44:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 04:44:33,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-27 04:44:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:33,183 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 04:44:33,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 04:44:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 04:44:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 04:44:33,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:33,184 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:33,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:33,387 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-27 04:44:33,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:33,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933609835] [2019-12-27 04:44:33,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:33,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933609835] [2019-12-27 04:44:33,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808911095] [2019-12-27 04:44:33,554 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:33,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 04:44:33,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:33,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 04:44:33,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:33,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:33,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 04:44:33,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083270595] [2019-12-27 04:44:33,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:44:33,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:44:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:44:33,641 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 20 states. [2019-12-27 04:44:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:34,007 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-27 04:44:34,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:44:34,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-27 04:44:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:34,008 INFO L225 Difference]: With dead ends: 58 [2019-12-27 04:44:34,008 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 04:44:34,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=844, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:44:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 04:44:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-27 04:44:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-27 04:44:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-27 04:44:34,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-27 04:44:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:34,012 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-27 04:44:34,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:44:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-27 04:44:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 04:44:34,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:34,013 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:34,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:34,215 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-27 04:44:34,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:34,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742901694] [2019-12-27 04:44:34,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:34,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742901694] [2019-12-27 04:44:34,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038603425] [2019-12-27 04:44:34,400 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:34,456 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-27 04:44:34,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:34,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 04:44:34,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:34,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:34,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 04:44:34,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581448266] [2019-12-27 04:44:34,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:44:34,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:44:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:44:34,479 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 20 states. [2019-12-27 04:44:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:34,848 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-27 04:44:34,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:44:34,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-27 04:44:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:34,850 INFO L225 Difference]: With dead ends: 59 [2019-12-27 04:44:34,850 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 04:44:34,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:44:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 04:44:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 04:44:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 04:44:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 04:44:34,854 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-27 04:44:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:34,854 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 04:44:34,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:44:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 04:44:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 04:44:34,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:34,855 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:35,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:35,058 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-27 04:44:35,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:35,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181001193] [2019-12-27 04:44:35,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:35,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181001193] [2019-12-27 04:44:35,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317022765] [2019-12-27 04:44:35,262 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:35,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 04:44:35,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:35,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:35,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 04:44:35,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848535] [2019-12-27 04:44:35,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 04:44:35,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 04:44:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:44:35,431 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 21 states. [2019-12-27 04:44:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:35,909 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-27 04:44:35,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:44:35,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-27 04:44:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:35,910 INFO L225 Difference]: With dead ends: 60 [2019-12-27 04:44:35,910 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 04:44:35,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:44:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 04:44:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-27 04:44:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:44:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 04:44:35,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-27 04:44:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:35,914 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 04:44:35,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 04:44:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 04:44:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 04:44:35,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:35,915 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:36,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:36,118 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-27 04:44:36,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:36,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044666152] [2019-12-27 04:44:36,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:36,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044666152] [2019-12-27 04:44:36,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425054149] [2019-12-27 04:44:36,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:36,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:36,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:36,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 04:44:36,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:36,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:36,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 04:44:36,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033064866] [2019-12-27 04:44:36,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 04:44:36,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 04:44:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:44:36,435 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 21 states. [2019-12-27 04:44:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:36,832 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-27 04:44:36,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:44:36,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-27 04:44:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:36,833 INFO L225 Difference]: With dead ends: 61 [2019-12-27 04:44:36,833 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 04:44:36,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 04:44:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 04:44:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 04:44:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:44:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 04:44:36,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-27 04:44:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:36,837 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 04:44:36,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 04:44:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 04:44:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 04:44:36,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:36,838 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:37,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:37,038 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-27 04:44:37,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:37,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332418614] [2019-12-27 04:44:37,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:37,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332418614] [2019-12-27 04:44:37,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764841082] [2019-12-27 04:44:37,242 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:37,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-27 04:44:37,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:37,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 04:44:37,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:37,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:37,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 04:44:37,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592882870] [2019-12-27 04:44:37,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 04:44:37,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 04:44:37,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:44:37,325 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 22 states. [2019-12-27 04:44:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:37,771 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-27 04:44:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:44:37,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-27 04:44:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:37,773 INFO L225 Difference]: With dead ends: 62 [2019-12-27 04:44:37,773 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 04:44:37,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1048, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 04:44:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 04:44:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-27 04:44:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-27 04:44:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-27 04:44:37,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-27 04:44:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:37,777 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-27 04:44:37,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 04:44:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-27 04:44:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 04:44:37,777 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:37,778 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:37,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:37,982 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-27 04:44:37,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:37,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477360132] [2019-12-27 04:44:37,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:38,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477360132] [2019-12-27 04:44:38,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169893082] [2019-12-27 04:44:38,153 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:38,203 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:38,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:38,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 04:44:38,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:38,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:38,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 04:44:38,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950540739] [2019-12-27 04:44:38,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 04:44:38,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 04:44:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:44:38,223 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 22 states. [2019-12-27 04:44:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:38,657 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-27 04:44:38,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:44:38,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-27 04:44:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:38,659 INFO L225 Difference]: With dead ends: 63 [2019-12-27 04:44:38,659 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 04:44:38,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=1033, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 04:44:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 04:44:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 04:44:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 04:44:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-27 04:44:38,663 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-27 04:44:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:38,664 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-27 04:44:38,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 04:44:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-27 04:44:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 04:44:38,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:38,665 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:38,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:38,868 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-27 04:44:38,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:38,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60234295] [2019-12-27 04:44:38,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:39,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60234295] [2019-12-27 04:44:39,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976671571] [2019-12-27 04:44:39,090 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:39,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-27 04:44:39,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:39,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 04:44:39,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:39,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:39,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 04:44:39,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555114694] [2019-12-27 04:44:39,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 04:44:39,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 04:44:39,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:44:39,182 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 23 states. [2019-12-27 04:44:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:39,638 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-27 04:44:39,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:44:39,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-27 04:44:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:39,639 INFO L225 Difference]: With dead ends: 64 [2019-12-27 04:44:39,639 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 04:44:39,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=541, Invalid=1099, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:44:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 04:44:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-27 04:44:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 04:44:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 04:44:39,641 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-27 04:44:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:39,641 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 04:44:39,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 04:44:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 04:44:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 04:44:39,642 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:39,642 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:39,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:39,843 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-27 04:44:39,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:39,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908833771] [2019-12-27 04:44:39,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:40,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908833771] [2019-12-27 04:44:40,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018529245] [2019-12-27 04:44:40,029 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:40,085 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-27 04:44:40,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:40,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 04:44:40,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:40,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:40,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 04:44:40,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739365038] [2019-12-27 04:44:40,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 04:44:40,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 04:44:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:44:40,123 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 23 states. [2019-12-27 04:44:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:40,618 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 04:44:40,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:44:40,618 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-27 04:44:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:40,619 INFO L225 Difference]: With dead ends: 65 [2019-12-27 04:44:40,619 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 04:44:40,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 04:44:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 04:44:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 04:44:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 04:44:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-27 04:44:40,624 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-27 04:44:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:40,624 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-27 04:44:40,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 04:44:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-27 04:44:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 04:44:40,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:40,625 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:40,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:40,828 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-27 04:44:40,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:40,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244251751] [2019-12-27 04:44:40,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:41,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244251751] [2019-12-27 04:44:41,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643576081] [2019-12-27 04:44:41,033 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:41,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 04:44:41,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:41,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:41,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 04:44:41,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123364472] [2019-12-27 04:44:41,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 04:44:41,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 04:44:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:44:41,115 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 24 states. [2019-12-27 04:44:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:41,604 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-27 04:44:41,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:44:41,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-27 04:44:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:41,605 INFO L225 Difference]: With dead ends: 66 [2019-12-27 04:44:41,605 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 04:44:41,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 04:44:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 04:44:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-27 04:44:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 04:44:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-27 04:44:41,608 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-27 04:44:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:41,608 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-27 04:44:41,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 04:44:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-27 04:44:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 04:44:41,608 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:41,609 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:41,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:41,811 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-27 04:44:41,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:41,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594015034] [2019-12-27 04:44:41,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:42,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594015034] [2019-12-27 04:44:42,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133880600] [2019-12-27 04:44:42,063 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:42,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:42,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:42,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 04:44:42,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:42,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:42,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 04:44:42,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808416905] [2019-12-27 04:44:42,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 04:44:42,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 04:44:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:44:42,143 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 24 states. [2019-12-27 04:44:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:42,644 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-27 04:44:42,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:44:42,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-27 04:44:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:42,650 INFO L225 Difference]: With dead ends: 67 [2019-12-27 04:44:42,650 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 04:44:42,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=635, Invalid=1257, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 04:44:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 04:44:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 04:44:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 04:44:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-27 04:44:42,653 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-27 04:44:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:42,654 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-27 04:44:42,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 04:44:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-27 04:44:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 04:44:42,654 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:42,654 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:42,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:42,856 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-27 04:44:42,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:42,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199417789] [2019-12-27 04:44:42,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:43,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199417789] [2019-12-27 04:44:43,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61849580] [2019-12-27 04:44:43,069 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:43,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-27 04:44:43,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:43,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 04:44:43,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:43,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:43,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 04:44:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671113047] [2019-12-27 04:44:43,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 04:44:43,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 04:44:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:44:43,162 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 25 states. [2019-12-27 04:44:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:43,694 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2019-12-27 04:44:43,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:44:43,698 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-12-27 04:44:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:43,699 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:44:43,699 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 04:44:43,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=1440, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 04:44:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 04:44:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2019-12-27 04:44:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 04:44:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 04:44:43,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 28 [2019-12-27 04:44:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:43,702 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 04:44:43,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 04:44:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 04:44:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 04:44:43,703 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:43,703 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:43,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:43,904 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-27 04:44:43,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:43,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758319614] [2019-12-27 04:44:43,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:44,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758319614] [2019-12-27 04:44:44,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113719907] [2019-12-27 04:44:44,118 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:44,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:44,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:44,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 04:44:44,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:44,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:44,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 04:44:44,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102211630] [2019-12-27 04:44:44,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 04:44:44,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 04:44:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:44:44,224 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 25 states. [2019-12-27 04:44:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:44,758 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2019-12-27 04:44:44,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:44:44,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-12-27 04:44:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:44,759 INFO L225 Difference]: With dead ends: 69 [2019-12-27 04:44:44,760 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 04:44:44,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1396, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 04:44:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 04:44:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 04:44:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 04:44:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2019-12-27 04:44:44,764 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 28 [2019-12-27 04:44:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:44,764 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2019-12-27 04:44:44,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 04:44:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2019-12-27 04:44:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 04:44:44,765 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:44,765 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:44,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:44,968 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1067760134, now seen corresponding path program 41 times [2019-12-27 04:44:44,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:44,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469223618] [2019-12-27 04:44:44,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:45,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469223618] [2019-12-27 04:44:45,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709227188] [2019-12-27 04:44:45,195 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:45,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 04:44:45,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:45,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 04:44:45,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:45,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 04:44:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124541256] [2019-12-27 04:44:45,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 04:44:45,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 04:44:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:44:45,286 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand 26 states. [2019-12-27 04:44:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:45,904 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-12-27 04:44:45,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:44:45,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-12-27 04:44:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:45,906 INFO L225 Difference]: With dead ends: 70 [2019-12-27 04:44:45,906 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:44:45,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=734, Invalid=1522, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 04:44:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:44:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2019-12-27 04:44:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 04:44:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-27 04:44:45,912 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 29 [2019-12-27 04:44:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:45,913 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-27 04:44:45,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 04:44:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-27 04:44:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 04:44:45,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:45,914 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:46,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:46,118 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:46,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1106913126, now seen corresponding path program 42 times [2019-12-27 04:44:46,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:46,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791724289] [2019-12-27 04:44:46,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:46,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791724289] [2019-12-27 04:44:46,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466679194] [2019-12-27 04:44:46,420 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:46,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-27 04:44:46,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:46,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 04:44:46,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:46,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:46,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 04:44:46,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440143681] [2019-12-27 04:44:46,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 04:44:46,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 04:44:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:44:46,530 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 26 states. [2019-12-27 04:44:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:47,076 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2019-12-27 04:44:47,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:44:47,077 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-12-27 04:44:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:47,078 INFO L225 Difference]: With dead ends: 71 [2019-12-27 04:44:47,078 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 04:44:47,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 04:44:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 04:44:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 04:44:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 04:44:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 138 transitions. [2019-12-27 04:44:47,081 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 138 transitions. Word has length 29 [2019-12-27 04:44:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:47,082 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 138 transitions. [2019-12-27 04:44:47,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 04:44:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 138 transitions. [2019-12-27 04:44:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 04:44:47,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:47,083 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:47,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:47,286 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1259174157, now seen corresponding path program 43 times [2019-12-27 04:44:47,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:47,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82890619] [2019-12-27 04:44:47,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:47,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82890619] [2019-12-27 04:44:47,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361429805] [2019-12-27 04:44:47,601 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:47,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 04:44:47,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:47,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:47,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 04:44:47,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824308532] [2019-12-27 04:44:47,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 04:44:47,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:47,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 04:44:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:44:47,695 INFO L87 Difference]: Start difference. First operand 68 states and 138 transitions. Second operand 27 states. [2019-12-27 04:44:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:48,315 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2019-12-27 04:44:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:44:48,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-12-27 04:44:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:48,319 INFO L225 Difference]: With dead ends: 72 [2019-12-27 04:44:48,319 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 04:44:48,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=769, Invalid=1583, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 04:44:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 04:44:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-12-27 04:44:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 04:44:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 04:44:48,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 30 [2019-12-27 04:44:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:48,323 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 04:44:48,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 04:44:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 04:44:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 04:44:48,323 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:48,323 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:48,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:48,527 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 45431767, now seen corresponding path program 44 times [2019-12-27 04:44:48,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:48,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754203568] [2019-12-27 04:44:48,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:48,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754203568] [2019-12-27 04:44:48,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87700987] [2019-12-27 04:44:48,764 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:48,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:48,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:48,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 04:44:48,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:48,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:48,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 04:44:48,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113011945] [2019-12-27 04:44:48,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 04:44:48,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 04:44:48,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:44:48,853 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 27 states. [2019-12-27 04:44:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:49,444 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2019-12-27 04:44:49,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:44:49,445 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-12-27 04:44:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:49,446 INFO L225 Difference]: With dead ends: 73 [2019-12-27 04:44:49,446 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 04:44:49,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=795, Invalid=1655, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 04:44:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 04:44:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 04:44:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:44:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2019-12-27 04:44:49,450 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 30 [2019-12-27 04:44:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:49,451 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2019-12-27 04:44:49,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 04:44:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2019-12-27 04:44:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 04:44:49,451 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:49,452 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:49,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:49,655 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash -379692898, now seen corresponding path program 45 times [2019-12-27 04:44:49,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:49,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890077802] [2019-12-27 04:44:49,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:49,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890077802] [2019-12-27 04:44:49,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841082181] [2019-12-27 04:44:49,899 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:49,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-27 04:44:49,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:49,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 04:44:49,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:49,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:49,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 04:44:49,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366802849] [2019-12-27 04:44:49,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 04:44:49,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:49,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 04:44:49,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:44:49,994 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand 28 states. [2019-12-27 04:44:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:50,643 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 04:44:50,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:44:50,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-12-27 04:44:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:50,644 INFO L225 Difference]: With dead ends: 74 [2019-12-27 04:44:50,644 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 04:44:50,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=860, Invalid=1792, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 04:44:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 04:44:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2019-12-27 04:44:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-27 04:44:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2019-12-27 04:44:50,648 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 31 [2019-12-27 04:44:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:50,649 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2019-12-27 04:44:50,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 04:44:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2019-12-27 04:44:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 04:44:50,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:50,650 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:50,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:50,853 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1408384834, now seen corresponding path program 46 times [2019-12-27 04:44:50,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:50,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163498220] [2019-12-27 04:44:50,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:51,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163498220] [2019-12-27 04:44:51,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139104019] [2019-12-27 04:44:51,089 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:51,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:51,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:51,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 04:44:51,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:51,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:51,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 04:44:51,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700770643] [2019-12-27 04:44:51,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 04:44:51,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 04:44:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:44:51,167 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand 28 states. [2019-12-27 04:44:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:51,810 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-27 04:44:51,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:44:51,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-12-27 04:44:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:51,811 INFO L225 Difference]: With dead ends: 75 [2019-12-27 04:44:51,811 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 04:44:51,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 04:44:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 04:44:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 04:44:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 04:44:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2019-12-27 04:44:51,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 31 [2019-12-27 04:44:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:51,815 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2019-12-27 04:44:51,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 04:44:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2019-12-27 04:44:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 04:44:51,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:51,816 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:52,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:52,016 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1114422107, now seen corresponding path program 47 times [2019-12-27 04:44:52,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:52,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137883598] [2019-12-27 04:44:52,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:52,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137883598] [2019-12-27 04:44:52,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213291851] [2019-12-27 04:44:52,292 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:52,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-27 04:44:52,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:52,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 04:44:52,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:52,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:52,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 04:44:52,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535273498] [2019-12-27 04:44:52,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 04:44:52,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:52,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 04:44:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:44:52,381 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand 29 states. [2019-12-27 04:44:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:53,111 INFO L93 Difference]: Finished difference Result 76 states and 154 transitions. [2019-12-27 04:44:53,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:44:53,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-12-27 04:44:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:53,113 INFO L225 Difference]: With dead ends: 76 [2019-12-27 04:44:53,113 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 04:44:53,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=898, Invalid=1858, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 04:44:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 04:44:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2019-12-27 04:44:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 04:44:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 04:44:53,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 32 [2019-12-27 04:44:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:53,116 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 04:44:53,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 04:44:53,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 04:44:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 04:44:53,117 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:53,117 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:53,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:53,320 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash 710257199, now seen corresponding path program 48 times [2019-12-27 04:44:53,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:53,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109677030] [2019-12-27 04:44:53,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:53,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109677030] [2019-12-27 04:44:53,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608575155] [2019-12-27 04:44:53,575 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:53,643 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-27 04:44:53,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:53,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 04:44:53,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:53,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:53,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 04:44:53,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760413640] [2019-12-27 04:44:53,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 04:44:53,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 04:44:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:44:53,670 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 29 states. [2019-12-27 04:44:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:54,354 INFO L93 Difference]: Finished difference Result 77 states and 156 transitions. [2019-12-27 04:44:54,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:44:54,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-12-27 04:44:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:54,355 INFO L225 Difference]: With dead ends: 77 [2019-12-27 04:44:54,356 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 04:44:54,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=926, Invalid=1936, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 04:44:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 04:44:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 04:44:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:44:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2019-12-27 04:44:54,359 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 32 [2019-12-27 04:44:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:54,359 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2019-12-27 04:44:54,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 04:44:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2019-12-27 04:44:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 04:44:54,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:54,360 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:54,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:54,563 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash 187347254, now seen corresponding path program 49 times [2019-12-27 04:44:54,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:54,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445211771] [2019-12-27 04:44:54,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:54,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445211771] [2019-12-27 04:44:54,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667572985] [2019-12-27 04:44:54,952 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:55,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 04:44:55,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:55,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:55,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 04:44:55,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431339657] [2019-12-27 04:44:55,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 04:44:55,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 04:44:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:44:55,057 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand 30 states. [2019-12-27 04:44:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:55,778 INFO L93 Difference]: Finished difference Result 78 states and 158 transitions. [2019-12-27 04:44:55,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 04:44:55,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-12-27 04:44:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:55,780 INFO L225 Difference]: With dead ends: 78 [2019-12-27 04:44:55,780 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 04:44:55,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=996, Invalid=2084, Unknown=0, NotChecked=0, Total=3080 [2019-12-27 04:44:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 04:44:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-12-27 04:44:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-27 04:44:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2019-12-27 04:44:55,784 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 33 [2019-12-27 04:44:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:55,784 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2019-12-27 04:44:55,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 04:44:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2019-12-27 04:44:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 04:44:55,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:55,785 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:55,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:55,988 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:55,989 INFO L82 PathProgramCache]: Analyzing trace with hash 543136746, now seen corresponding path program 50 times [2019-12-27 04:44:55,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:55,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621216608] [2019-12-27 04:44:55,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:56,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621216608] [2019-12-27 04:44:56,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647362751] [2019-12-27 04:44:56,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:56,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:44:56,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:56,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 04:44:56,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:56,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:56,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 04:44:56,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930247371] [2019-12-27 04:44:56,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 04:44:56,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 04:44:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:44:56,390 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand 30 states. [2019-12-27 04:44:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:57,108 INFO L93 Difference]: Finished difference Result 79 states and 160 transitions. [2019-12-27 04:44:57,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 04:44:57,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-12-27 04:44:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:57,110 INFO L225 Difference]: With dead ends: 79 [2019-12-27 04:44:57,110 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 04:44:57,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1019, Invalid=2061, Unknown=0, NotChecked=0, Total=3080 [2019-12-27 04:44:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 04:44:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 04:44:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 04:44:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2019-12-27 04:44:57,117 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 33 [2019-12-27 04:44:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:57,118 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2019-12-27 04:44:57,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 04:44:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2019-12-27 04:44:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 04:44:57,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:57,122 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:57,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:57,323 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797635, now seen corresponding path program 51 times [2019-12-27 04:44:57,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:57,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998504139] [2019-12-27 04:44:57,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:57,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998504139] [2019-12-27 04:44:57,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617823687] [2019-12-27 04:44:57,667 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:57,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-27 04:44:57,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:57,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 04:44:57,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:57,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:57,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 04:44:57,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790840708] [2019-12-27 04:44:57,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 04:44:57,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 04:44:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:44:57,761 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand 31 states. [2019-12-27 04:44:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:58,612 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-12-27 04:44:58,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 04:44:58,613 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-12-27 04:44:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:58,613 INFO L225 Difference]: With dead ends: 80 [2019-12-27 04:44:58,613 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 04:44:58,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=2155, Unknown=0, NotChecked=0, Total=3192 [2019-12-27 04:44:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 04:44:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2019-12-27 04:44:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 04:44:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 04:44:58,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 34 [2019-12-27 04:44:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:58,617 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 04:44:58,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 04:44:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 04:44:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 04:44:58,618 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:58,618 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:44:58,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:58,819 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:44:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:44:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash -342629753, now seen corresponding path program 52 times [2019-12-27 04:44:58,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:44:58,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746601330] [2019-12-27 04:44:58,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:44:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:44:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:59,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746601330] [2019-12-27 04:44:59,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282716681] [2019-12-27 04:44:59,141 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:44:59,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:44:59,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:44:59,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 04:44:59,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:44:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:44:59,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:44:59,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 04:44:59,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802283147] [2019-12-27 04:44:59,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 04:44:59,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:44:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 04:44:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:44:59,242 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 31 states. [2019-12-27 04:44:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:44:59,990 INFO L93 Difference]: Finished difference Result 81 states and 164 transitions. [2019-12-27 04:44:59,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 04:44:59,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-12-27 04:44:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:44:59,991 INFO L225 Difference]: With dead ends: 81 [2019-12-27 04:44:59,992 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 04:44:59,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 04:44:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 04:44:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 04:44:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 04:44:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2019-12-27 04:44:59,996 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 34 [2019-12-27 04:44:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:44:59,996 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2019-12-27 04:44:59,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 04:44:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2019-12-27 04:44:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 04:44:59,997 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:44:59,997 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:00,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:00,200 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:00,201 INFO L82 PathProgramCache]: Analyzing trace with hash -347913266, now seen corresponding path program 53 times [2019-12-27 04:45:00,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:00,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801888935] [2019-12-27 04:45:00,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:00,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801888935] [2019-12-27 04:45:00,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925521212] [2019-12-27 04:45:00,546 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:00,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 04:45:00,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:00,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 04:45:00,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:00,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:00,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 04:45:00,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771954260] [2019-12-27 04:45:00,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 04:45:00,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 04:45:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:45:00,646 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand 32 states. [2019-12-27 04:45:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:01,465 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2019-12-27 04:45:01,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:45:01,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-12-27 04:45:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:01,466 INFO L225 Difference]: With dead ends: 82 [2019-12-27 04:45:01,466 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 04:45:01,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1142, Invalid=2398, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 04:45:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 04:45:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-12-27 04:45:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:45:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 96 transitions. [2019-12-27 04:45:01,470 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 96 transitions. Word has length 35 [2019-12-27 04:45:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:01,470 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 96 transitions. [2019-12-27 04:45:01,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 04:45:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 96 transitions. [2019-12-27 04:45:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 04:45:01,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:01,471 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:01,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:01,675 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2031587694, now seen corresponding path program 54 times [2019-12-27 04:45:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:01,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312357448] [2019-12-27 04:45:01,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:02,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312357448] [2019-12-27 04:45:02,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457879010] [2019-12-27 04:45:02,149 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:02,300 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-27 04:45:02,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:02,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 04:45:02,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:02,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:02,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 04:45:02,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239975189] [2019-12-27 04:45:02,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 04:45:02,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 04:45:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:45:02,401 INFO L87 Difference]: Start difference. First operand 47 states and 96 transitions. Second operand 32 states. [2019-12-27 04:45:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:03,560 INFO L93 Difference]: Finished difference Result 83 states and 168 transitions. [2019-12-27 04:45:03,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:45:03,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-12-27 04:45:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:03,561 INFO L225 Difference]: With dead ends: 83 [2019-12-27 04:45:03,561 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 04:45:03,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1167, Invalid=2373, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 04:45:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 04:45:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 04:45:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:45:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2019-12-27 04:45:03,565 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 35 [2019-12-27 04:45:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:03,565 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2019-12-27 04:45:03,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 04:45:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2019-12-27 04:45:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 04:45:03,566 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:03,566 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:03,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:03,770 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2099590699, now seen corresponding path program 55 times [2019-12-27 04:45:03,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:03,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123875794] [2019-12-27 04:45:03,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:04,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123875794] [2019-12-27 04:45:04,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740862803] [2019-12-27 04:45:04,163 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:04,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 04:45:04,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:04,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:04,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 04:45:04,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279771910] [2019-12-27 04:45:04,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 04:45:04,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 04:45:04,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:45:04,252 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 33 states. [2019-12-27 04:45:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:05,102 INFO L93 Difference]: Finished difference Result 84 states and 170 transitions. [2019-12-27 04:45:05,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:45:05,102 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-12-27 04:45:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:05,103 INFO L225 Difference]: With dead ends: 84 [2019-12-27 04:45:05,104 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 04:45:05,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1186, Invalid=2474, Unknown=0, NotChecked=0, Total=3660 [2019-12-27 04:45:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 04:45:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2019-12-27 04:45:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 04:45:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 04:45:05,107 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 36 [2019-12-27 04:45:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:05,107 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 04:45:05,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 04:45:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 04:45:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 04:45:05,108 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:05,108 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:05,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:05,309 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1445291231, now seen corresponding path program 56 times [2019-12-27 04:45:05,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:05,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931936968] [2019-12-27 04:45:05,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:05,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931936968] [2019-12-27 04:45:05,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337258918] [2019-12-27 04:45:05,767 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:05,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:45:05,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:05,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 04:45:05,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:05,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:05,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 04:45:05,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304599829] [2019-12-27 04:45:05,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 04:45:05,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:05,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 04:45:05,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:45:05,858 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 33 states. [2019-12-27 04:45:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:06,696 INFO L93 Difference]: Finished difference Result 85 states and 172 transitions. [2019-12-27 04:45:06,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 04:45:06,697 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-12-27 04:45:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:06,698 INFO L225 Difference]: With dead ends: 85 [2019-12-27 04:45:06,698 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 04:45:06,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=2564, Unknown=0, NotChecked=0, Total=3782 [2019-12-27 04:45:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 04:45:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 04:45:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 04:45:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2019-12-27 04:45:06,703 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 36 [2019-12-27 04:45:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:06,703 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2019-12-27 04:45:06,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 04:45:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2019-12-27 04:45:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 04:45:06,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:06,704 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:06,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:06,907 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash 662802534, now seen corresponding path program 57 times [2019-12-27 04:45:06,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:06,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868492188] [2019-12-27 04:45:06,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:07,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868492188] [2019-12-27 04:45:07,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490523517] [2019-12-27 04:45:07,473 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:07,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-27 04:45:07,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:07,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 04:45:07,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:07,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:07,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 04:45:07,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599095888] [2019-12-27 04:45:07,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 04:45:07,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 04:45:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:45:07,594 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand 34 states. [2019-12-27 04:45:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:08,452 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2019-12-27 04:45:08,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 04:45:08,452 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-12-27 04:45:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:08,453 INFO L225 Difference]: With dead ends: 86 [2019-12-27 04:45:08,453 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 04:45:08,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1298, Invalid=2734, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 04:45:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 04:45:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2019-12-27 04:45:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 04:45:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-27 04:45:08,458 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 37 [2019-12-27 04:45:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:08,458 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-27 04:45:08,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 04:45:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-27 04:45:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 04:45:08,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:08,459 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:08,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:08,662 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:08,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1854355258, now seen corresponding path program 58 times [2019-12-27 04:45:08,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:08,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249719476] [2019-12-27 04:45:08,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:09,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249719476] [2019-12-27 04:45:09,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045311520] [2019-12-27 04:45:09,047 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:09,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:45:09,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:09,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 04:45:09,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:09,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:09,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 04:45:09,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063769892] [2019-12-27 04:45:09,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 04:45:09,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 04:45:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:45:09,166 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 34 states. [2019-12-27 04:45:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:10,032 INFO L93 Difference]: Finished difference Result 87 states and 176 transitions. [2019-12-27 04:45:10,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 04:45:10,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-12-27 04:45:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:10,034 INFO L225 Difference]: With dead ends: 87 [2019-12-27 04:45:10,034 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 04:45:10,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 04:45:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 04:45:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 04:45:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:45:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2019-12-27 04:45:10,038 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 37 [2019-12-27 04:45:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:10,038 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2019-12-27 04:45:10,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 04:45:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2019-12-27 04:45:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 04:45:10,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:10,039 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:10,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:10,243 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash -927957869, now seen corresponding path program 59 times [2019-12-27 04:45:10,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:10,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521418766] [2019-12-27 04:45:10,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:10,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521418766] [2019-12-27 04:45:10,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031817640] [2019-12-27 04:45:10,805 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:10,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-27 04:45:10,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:10,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 04:45:10,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:10,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:10,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 04:45:10,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561418873] [2019-12-27 04:45:10,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 04:45:10,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 04:45:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:45:10,997 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand 35 states. [2019-12-27 04:45:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:12,443 INFO L93 Difference]: Finished difference Result 88 states and 178 transitions. [2019-12-27 04:45:12,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 04:45:12,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-12-27 04:45:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:12,445 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:45:12,445 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 04:45:12,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1345, Invalid=2815, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 04:45:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 04:45:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-12-27 04:45:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:45:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 04:45:12,449 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 38 [2019-12-27 04:45:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:12,449 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 04:45:12,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 04:45:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 04:45:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 04:45:12,450 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:12,451 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:12,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:12,652 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1650438455, now seen corresponding path program 60 times [2019-12-27 04:45:12,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:12,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203365322] [2019-12-27 04:45:12,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:13,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203365322] [2019-12-27 04:45:13,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32810877] [2019-12-27 04:45:13,323 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:13,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-27 04:45:13,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:13,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 04:45:13,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:13,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 04:45:13,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609081656] [2019-12-27 04:45:13,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 04:45:13,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 04:45:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:45:13,443 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 35 states. [2019-12-27 04:45:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:14,354 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2019-12-27 04:45:14,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 04:45:14,355 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-12-27 04:45:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:14,356 INFO L225 Difference]: With dead ends: 89 [2019-12-27 04:45:14,356 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 04:45:14,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1379, Invalid=2911, Unknown=0, NotChecked=0, Total=4290 [2019-12-27 04:45:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 04:45:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 04:45:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 04:45:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2019-12-27 04:45:14,359 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 38 [2019-12-27 04:45:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:14,359 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2019-12-27 04:45:14,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 04:45:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2019-12-27 04:45:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 04:45:14,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:14,360 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:14,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:14,561 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1298077438, now seen corresponding path program 61 times [2019-12-27 04:45:14,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:14,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759824337] [2019-12-27 04:45:14,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:15,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759824337] [2019-12-27 04:45:15,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990014212] [2019-12-27 04:45:15,002 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:15,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 04:45:15,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:15,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:15,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 04:45:15,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522963969] [2019-12-27 04:45:15,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 04:45:15,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 04:45:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:45:15,115 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand 36 states. [2019-12-27 04:45:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:16,115 INFO L93 Difference]: Finished difference Result 90 states and 182 transitions. [2019-12-27 04:45:16,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 04:45:16,115 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-12-27 04:45:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:16,116 INFO L225 Difference]: With dead ends: 90 [2019-12-27 04:45:16,117 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:45:16,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 04:45:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:45:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2019-12-27 04:45:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 04:45:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 104 transitions. [2019-12-27 04:45:16,120 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 104 transitions. Word has length 39 [2019-12-27 04:45:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:16,121 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 104 transitions. [2019-12-27 04:45:16,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 04:45:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 104 transitions. [2019-12-27 04:45:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 04:45:16,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:16,121 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:16,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:16,322 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:16,322 INFO L82 PathProgramCache]: Analyzing trace with hash -376015390, now seen corresponding path program 62 times [2019-12-27 04:45:16,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:16,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197206747] [2019-12-27 04:45:16,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:16,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197206747] [2019-12-27 04:45:16,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825304395] [2019-12-27 04:45:16,727 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:16,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:45:16,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:16,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 04:45:16,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:16,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:16,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 04:45:16,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920867542] [2019-12-27 04:45:16,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 04:45:16,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 04:45:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:45:16,843 INFO L87 Difference]: Start difference. First operand 51 states and 104 transitions. Second operand 36 states. [2019-12-27 04:45:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:18,061 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2019-12-27 04:45:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 04:45:18,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-12-27 04:45:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:18,063 INFO L225 Difference]: With dead ends: 91 [2019-12-27 04:45:18,063 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 04:45:18,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1493, Invalid=3063, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 04:45:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 04:45:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 04:45:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:45:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2019-12-27 04:45:18,067 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 39 [2019-12-27 04:45:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:18,067 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2019-12-27 04:45:18,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 04:45:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2019-12-27 04:45:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 04:45:18,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:18,068 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:18,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:18,271 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1585694971, now seen corresponding path program 63 times [2019-12-27 04:45:18,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:18,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544442080] [2019-12-27 04:45:18,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:18,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544442080] [2019-12-27 04:45:18,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958649017] [2019-12-27 04:45:18,944 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:19,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-27 04:45:19,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:19,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 04:45:19,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:19,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:19,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 04:45:19,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965068836] [2019-12-27 04:45:19,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 04:45:19,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 04:45:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:45:19,068 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand 37 states. [2019-12-27 04:45:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:20,083 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2019-12-27 04:45:20,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 04:45:20,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-12-27 04:45:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:20,085 INFO L225 Difference]: With dead ends: 92 [2019-12-27 04:45:20,085 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 04:45:20,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1514, Invalid=3178, Unknown=0, NotChecked=0, Total=4692 [2019-12-27 04:45:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 04:45:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 52. [2019-12-27 04:45:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 04:45:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 04:45:20,087 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 40 [2019-12-27 04:45:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:20,088 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 04:45:20,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 04:45:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 04:45:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 04:45:20,088 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:20,088 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:20,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:20,289 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1228425103, now seen corresponding path program 64 times [2019-12-27 04:45:20,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:20,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662627885] [2019-12-27 04:45:20,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:20,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662627885] [2019-12-27 04:45:20,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997067108] [2019-12-27 04:45:20,747 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:20,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:45:20,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:20,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 04:45:20,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:20,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:20,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 04:45:20,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301705283] [2019-12-27 04:45:20,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 04:45:20,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 04:45:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:45:20,835 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 37 states. [2019-12-27 04:45:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:21,821 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2019-12-27 04:45:21,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 04:45:21,821 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-12-27 04:45:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:21,822 INFO L225 Difference]: With dead ends: 93 [2019-12-27 04:45:21,823 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 04:45:21,823 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1550, Invalid=3280, Unknown=0, NotChecked=0, Total=4830 [2019-12-27 04:45:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 04:45:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 04:45:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 04:45:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-12-27 04:45:21,826 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 40 [2019-12-27 04:45:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:21,827 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-12-27 04:45:21,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 04:45:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-12-27 04:45:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 04:45:21,827 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:21,827 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:22,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:22,028 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1911904150, now seen corresponding path program 65 times [2019-12-27 04:45:22,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:22,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694829348] [2019-12-27 04:45:22,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:22,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694829348] [2019-12-27 04:45:22,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267564794] [2019-12-27 04:45:22,460 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:22,537 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 04:45:22,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:22,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 04:45:22,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:22,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:22,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 04:45:22,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373845609] [2019-12-27 04:45:22,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 04:45:22,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 04:45:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 04:45:22,591 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 38 states. [2019-12-27 04:45:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:23,648 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2019-12-27 04:45:23,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 04:45:23,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-27 04:45:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:23,649 INFO L225 Difference]: With dead ends: 94 [2019-12-27 04:45:23,650 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 04:45:23,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1640, Invalid=3472, Unknown=0, NotChecked=0, Total=5112 [2019-12-27 04:45:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 04:45:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 53. [2019-12-27 04:45:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 04:45:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 04:45:23,654 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 41 [2019-12-27 04:45:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:23,654 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 04:45:23,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 04:45:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 04:45:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 04:45:23,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:23,655 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:23,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:23,858 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash -573527414, now seen corresponding path program 66 times [2019-12-27 04:45:23,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:23,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565952267] [2019-12-27 04:45:23,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:24,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565952267] [2019-12-27 04:45:24,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434213829] [2019-12-27 04:45:24,318 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:24,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-27 04:45:24,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:24,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 04:45:24,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:24,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:24,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 04:45:24,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846179807] [2019-12-27 04:45:24,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 04:45:24,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 04:45:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 04:45:24,434 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 38 states. [2019-12-27 04:45:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:25,483 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2019-12-27 04:45:25,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 04:45:25,484 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-27 04:45:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:25,485 INFO L225 Difference]: With dead ends: 95 [2019-12-27 04:45:25,485 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 04:45:25,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1671, Invalid=3441, Unknown=0, NotChecked=0, Total=5112 [2019-12-27 04:45:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 04:45:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-27 04:45:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 04:45:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2019-12-27 04:45:25,489 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 41 [2019-12-27 04:45:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:25,489 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2019-12-27 04:45:25,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 04:45:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2019-12-27 04:45:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 04:45:25,490 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:25,490 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:25,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:25,694 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -860513437, now seen corresponding path program 67 times [2019-12-27 04:45:25,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:25,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027489838] [2019-12-27 04:45:25,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:26,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027489838] [2019-12-27 04:45:26,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402148775] [2019-12-27 04:45:26,156 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:26,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 04:45:26,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:26,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:26,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 04:45:26,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916660575] [2019-12-27 04:45:26,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 04:45:26,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 04:45:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:45:26,252 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand 39 states. [2019-12-27 04:45:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:27,379 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-27 04:45:27,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 04:45:27,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-12-27 04:45:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:27,381 INFO L225 Difference]: With dead ends: 96 [2019-12-27 04:45:27,381 INFO L226 Difference]: Without dead ends: 93 [2019-12-27 04:45:27,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1693, Invalid=3563, Unknown=0, NotChecked=0, Total=5256 [2019-12-27 04:45:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-27 04:45:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2019-12-27 04:45:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 04:45:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 04:45:27,383 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 42 [2019-12-27 04:45:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:27,384 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 04:45:27,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 04:45:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 04:45:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 04:45:27,384 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:27,384 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:27,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:27,585 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -599480345, now seen corresponding path program 68 times [2019-12-27 04:45:27,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:27,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073425088] [2019-12-27 04:45:27,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:28,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073425088] [2019-12-27 04:45:28,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920349087] [2019-12-27 04:45:28,030 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:28,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:45:28,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:28,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 04:45:28,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:28,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:28,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 04:45:28,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060603222] [2019-12-27 04:45:28,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 04:45:28,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:28,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 04:45:28,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:45:28,125 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 39 states. [2019-12-27 04:45:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:29,200 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2019-12-27 04:45:29,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 04:45:29,201 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-12-27 04:45:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:29,202 INFO L225 Difference]: With dead ends: 97 [2019-12-27 04:45:29,202 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 04:45:29,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1731, Invalid=3671, Unknown=0, NotChecked=0, Total=5402 [2019-12-27 04:45:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 04:45:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-12-27 04:45:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 04:45:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2019-12-27 04:45:29,205 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 42 [2019-12-27 04:45:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:29,205 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2019-12-27 04:45:29,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 04:45:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2019-12-27 04:45:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 04:45:29,206 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:29,206 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:29,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:29,409 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -906112466, now seen corresponding path program 69 times [2019-12-27 04:45:29,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:29,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437057478] [2019-12-27 04:45:29,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437057478] [2019-12-27 04:45:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688990521] [2019-12-27 04:45:29,887 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:29,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-27 04:45:29,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:29,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 04:45:29,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:29,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:29,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 04:45:29,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096467018] [2019-12-27 04:45:30,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 04:45:30,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 04:45:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 04:45:30,001 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand 40 states. [2019-12-27 04:45:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:31,172 INFO L93 Difference]: Finished difference Result 98 states and 198 transitions. [2019-12-27 04:45:31,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 04:45:31,173 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-12-27 04:45:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:31,174 INFO L225 Difference]: With dead ends: 98 [2019-12-27 04:45:31,174 INFO L226 Difference]: Without dead ends: 95 [2019-12-27 04:45:31,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1826, Invalid=3874, Unknown=0, NotChecked=0, Total=5700 [2019-12-27 04:45:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-27 04:45:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2019-12-27 04:45:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:45:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2019-12-27 04:45:31,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 43 [2019-12-27 04:45:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:31,178 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2019-12-27 04:45:31,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 04:45:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2019-12-27 04:45:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 04:45:31,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:31,178 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:31,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:31,382 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1404021454, now seen corresponding path program 70 times [2019-12-27 04:45:31,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:31,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327184498] [2019-12-27 04:45:31,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:31,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327184498] [2019-12-27 04:45:31,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001172371] [2019-12-27 04:45:31,865 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:31,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:45:31,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:31,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 04:45:31,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:31,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:31,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 04:45:31,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579213245] [2019-12-27 04:45:31,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 04:45:31,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 04:45:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 04:45:31,967 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand 40 states. [2019-12-27 04:45:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:33,121 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2019-12-27 04:45:33,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 04:45:33,121 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-12-27 04:45:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:33,122 INFO L225 Difference]: With dead ends: 99 [2019-12-27 04:45:33,123 INFO L226 Difference]: Without dead ends: 96 [2019-12-27 04:45:33,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1859, Invalid=3841, Unknown=0, NotChecked=0, Total=5700 [2019-12-27 04:45:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-27 04:45:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-12-27 04:45:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:45:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 194 transitions. [2019-12-27 04:45:33,126 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 194 transitions. Word has length 43 [2019-12-27 04:45:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:33,126 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 194 transitions. [2019-12-27 04:45:33,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 04:45:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 194 transitions. [2019-12-27 04:45:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 04:45:33,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:33,127 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:33,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:33,330 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1975284683, now seen corresponding path program 71 times [2019-12-27 04:45:33,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:33,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849579400] [2019-12-27 04:45:33,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:33,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849579400] [2019-12-27 04:45:33,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425896735] [2019-12-27 04:45:33,835 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:33,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-27 04:45:33,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:33,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 04:45:33,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:33,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:33,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 04:45:33,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498119137] [2019-12-27 04:45:33,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 04:45:33,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:33,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 04:45:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:45:33,966 INFO L87 Difference]: Start difference. First operand 96 states and 194 transitions. Second operand 41 states. [2019-12-27 04:45:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:35,187 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2019-12-27 04:45:35,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 04:45:35,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-12-27 04:45:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:35,189 INFO L225 Difference]: With dead ends: 100 [2019-12-27 04:45:35,189 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 04:45:35,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1882, Invalid=3970, Unknown=0, NotChecked=0, Total=5852 [2019-12-27 04:45:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 04:45:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2019-12-27 04:45:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 04:45:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 04:45:35,193 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 44 [2019-12-27 04:45:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:35,193 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 04:45:35,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 04:45:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 04:45:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 04:45:35,194 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:35,194 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:35,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:35,398 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash -574991809, now seen corresponding path program 72 times [2019-12-27 04:45:35,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:35,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781876748] [2019-12-27 04:45:35,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:35,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781876748] [2019-12-27 04:45:35,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172389745] [2019-12-27 04:45:35,883 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:35,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-27 04:45:35,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:35,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 04:45:35,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:36,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:36,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 04:45:36,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346043606] [2019-12-27 04:45:36,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 04:45:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 04:45:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:45:36,025 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 41 states. [2019-12-27 04:45:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:37,571 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2019-12-27 04:45:37,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 04:45:37,571 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-12-27 04:45:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:37,572 INFO L225 Difference]: With dead ends: 101 [2019-12-27 04:45:37,572 INFO L226 Difference]: Without dead ends: 98 [2019-12-27 04:45:37,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1922, Invalid=4084, Unknown=0, NotChecked=0, Total=6006 [2019-12-27 04:45:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-27 04:45:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-27 04:45:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:45:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2019-12-27 04:45:37,578 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 44 [2019-12-27 04:45:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:37,578 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2019-12-27 04:45:37,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 04:45:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2019-12-27 04:45:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 04:45:37,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:37,579 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:37,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:37,783 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:37,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1104283334, now seen corresponding path program 73 times [2019-12-27 04:45:37,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:37,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314391722] [2019-12-27 04:45:37,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:38,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314391722] [2019-12-27 04:45:38,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065021730] [2019-12-27 04:45:38,289 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:38,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 04:45:38,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:38,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:38,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 04:45:38,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364433830] [2019-12-27 04:45:38,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 04:45:38,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 04:45:38,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 04:45:38,394 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand 42 states. [2019-12-27 04:45:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:39,658 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2019-12-27 04:45:39,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 04:45:39,659 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-12-27 04:45:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:39,660 INFO L225 Difference]: With dead ends: 102 [2019-12-27 04:45:39,660 INFO L226 Difference]: Without dead ends: 99 [2019-12-27 04:45:39,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2022, Invalid=4298, Unknown=0, NotChecked=0, Total=6320 [2019-12-27 04:45:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-27 04:45:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2019-12-27 04:45:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 04:45:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-27 04:45:39,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 45 [2019-12-27 04:45:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:39,663 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-27 04:45:39,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 04:45:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-27 04:45:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 04:45:39,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:39,664 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:39,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:39,866 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash -644876838, now seen corresponding path program 74 times [2019-12-27 04:45:39,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:39,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258166010] [2019-12-27 04:45:39,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:40,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258166010] [2019-12-27 04:45:40,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904256024] [2019-12-27 04:45:40,364 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:40,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:45:40,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:40,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 04:45:40,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:40,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:40,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 04:45:40,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630363861] [2019-12-27 04:45:40,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 04:45:40,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 04:45:40,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 04:45:40,487 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 42 states. [2019-12-27 04:45:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:41,605 INFO L93 Difference]: Finished difference Result 103 states and 208 transitions. [2019-12-27 04:45:41,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 04:45:41,605 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-12-27 04:45:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:41,606 INFO L225 Difference]: With dead ends: 103 [2019-12-27 04:45:41,606 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 04:45:41,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1849, Invalid=4471, Unknown=0, NotChecked=0, Total=6320 [2019-12-27 04:45:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 04:45:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-12-27 04:45:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 04:45:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 202 transitions. [2019-12-27 04:45:41,609 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 202 transitions. Word has length 45 [2019-12-27 04:45:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:41,609 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 202 transitions. [2019-12-27 04:45:41,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 04:45:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 202 transitions. [2019-12-27 04:45:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 04:45:41,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:41,610 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:41,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:41,811 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash -126954957, now seen corresponding path program 75 times [2019-12-27 04:45:41,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:41,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739130668] [2019-12-27 04:45:41,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:42,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739130668] [2019-12-27 04:45:42,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052724956] [2019-12-27 04:45:42,345 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:42,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-27 04:45:42,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:42,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 04:45:42,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:42,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:42,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 04:45:42,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666874110] [2019-12-27 04:45:42,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 04:45:42,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 04:45:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 04:45:42,471 INFO L87 Difference]: Start difference. First operand 100 states and 202 transitions. Second operand 43 states. [2019-12-27 04:45:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:43,786 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2019-12-27 04:45:43,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 04:45:43,787 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-12-27 04:45:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:43,788 INFO L225 Difference]: With dead ends: 104 [2019-12-27 04:45:43,788 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 04:45:43,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2081, Invalid=4399, Unknown=0, NotChecked=0, Total=6480 [2019-12-27 04:45:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 04:45:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2019-12-27 04:45:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:45:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 04:45:43,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 46 [2019-12-27 04:45:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:43,791 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 04:45:43,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 04:45:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 04:45:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 04:45:43,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:43,792 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:43,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:43,996 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1483654807, now seen corresponding path program 76 times [2019-12-27 04:45:43,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:43,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992339641] [2019-12-27 04:45:43,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:44,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992339641] [2019-12-27 04:45:44,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293689032] [2019-12-27 04:45:44,536 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:44,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:45:44,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:44,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 04:45:44,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:44,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:44,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 04:45:44,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709251518] [2019-12-27 04:45:44,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 04:45:44,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 04:45:44,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 04:45:44,632 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 43 states. [2019-12-27 04:45:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:45,992 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2019-12-27 04:45:45,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 04:45:45,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-12-27 04:45:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:45,994 INFO L225 Difference]: With dead ends: 105 [2019-12-27 04:45:45,994 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 04:45:45,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2123, Invalid=4519, Unknown=0, NotChecked=0, Total=6642 [2019-12-27 04:45:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 04:45:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-12-27 04:45:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 04:45:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 206 transitions. [2019-12-27 04:45:45,997 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 206 transitions. Word has length 46 [2019-12-27 04:45:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:45,997 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 206 transitions. [2019-12-27 04:45:45,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 04:45:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 206 transitions. [2019-12-27 04:45:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 04:45:45,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:45,998 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:46,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:46,202 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash 359363934, now seen corresponding path program 77 times [2019-12-27 04:45:46,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:46,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596163206] [2019-12-27 04:45:46,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:46,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596163206] [2019-12-27 04:45:46,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392287868] [2019-12-27 04:45:46,768 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:46,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 04:45:46,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:46,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 04:45:46,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:46,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:46,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 04:45:46,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32522747] [2019-12-27 04:45:46,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-27 04:45:46,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-27 04:45:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 04:45:46,877 INFO L87 Difference]: Start difference. First operand 102 states and 206 transitions. Second operand 44 states. [2019-12-27 04:45:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:48,227 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2019-12-27 04:45:48,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 04:45:48,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-27 04:45:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:48,228 INFO L225 Difference]: With dead ends: 106 [2019-12-27 04:45:48,228 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 04:45:48,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2228, Invalid=4744, Unknown=0, NotChecked=0, Total=6972 [2019-12-27 04:45:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 04:45:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2019-12-27 04:45:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 04:45:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2019-12-27 04:45:48,231 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 47 [2019-12-27 04:45:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:48,231 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2019-12-27 04:45:48,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-27 04:45:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2019-12-27 04:45:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 04:45:48,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:48,232 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:48,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:48,435 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1251341182, now seen corresponding path program 78 times [2019-12-27 04:45:48,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:48,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638721225] [2019-12-27 04:45:48,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:48,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638721225] [2019-12-27 04:45:48,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271795656] [2019-12-27 04:45:48,982 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:49,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-27 04:45:49,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:49,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-27 04:45:49,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:49,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:45:49,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 04:45:49,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731160735] [2019-12-27 04:45:49,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-27 04:45:49,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-27 04:45:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 04:45:49,113 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand 44 states. [2019-12-27 04:45:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:50,297 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2019-12-27 04:45:50,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 04:45:50,298 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-27 04:45:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:50,299 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:45:50,299 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 04:45:50,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2036, Invalid=4936, Unknown=0, NotChecked=0, Total=6972 [2019-12-27 04:45:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 04:45:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-12-27 04:45:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 04:45:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2019-12-27 04:45:50,302 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 47 [2019-12-27 04:45:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:50,302 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2019-12-27 04:45:50,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-27 04:45:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2019-12-27 04:45:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 04:45:50,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:50,303 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:50,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:50,503 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619877, now seen corresponding path program 79 times [2019-12-27 04:45:50,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:50,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011441533] [2019-12-27 04:45:50,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:50,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011441533] [2019-12-27 04:45:50,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678969618] [2019-12-27 04:45:50,821 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:50,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 04:45:50,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:50,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:45:50,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-27 04:45:50,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140348663] [2019-12-27 04:45:50,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 04:45:50,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 04:45:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:45:50,907 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand 23 states. [2019-12-27 04:45:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:50,951 INFO L93 Difference]: Finished difference Result 921 states and 1757 transitions. [2019-12-27 04:45:50,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:45:50,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 04:45:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:50,952 INFO L225 Difference]: With dead ends: 921 [2019-12-27 04:45:50,952 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 04:45:50,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:45:50,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 04:45:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 04:45:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 04:45:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 94 transitions. [2019-12-27 04:45:50,954 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 94 transitions. Word has length 48 [2019-12-27 04:45:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:50,954 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 94 transitions. [2019-12-27 04:45:50,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 04:45:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 94 transitions. [2019-12-27 04:45:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 04:45:50,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:45:50,955 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:45:51,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:51,159 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:45:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:45:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -136870673, now seen corresponding path program 80 times [2019-12-27 04:45:51,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:45:51,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302417115] [2019-12-27 04:45:51,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:45:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:45:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:52,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302417115] [2019-12-27 04:45:52,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110614843] [2019-12-27 04:45:52,153 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:52,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:45:52,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:45:52,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 04:45:52,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:45:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:45:52,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:45:52,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [42] total 65 [2019-12-27 04:45:52,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444819485] [2019-12-27 04:45:52,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 04:45:52,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:45:52,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 04:45:52,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 04:45:52,865 INFO L87 Difference]: Start difference. First operand 60 states and 94 transitions. Second operand 23 states. [2019-12-27 04:45:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:45:52,938 INFO L93 Difference]: Finished difference Result 451 states and 644 transitions. [2019-12-27 04:45:52,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:45:52,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 04:45:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:45:52,938 INFO L225 Difference]: With dead ends: 451 [2019-12-27 04:45:52,939 INFO L226 Difference]: Without dead ends: 0 [2019-12-27 04:45:52,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 04:45:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-27 04:45:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-27 04:45:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-27 04:45:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-27 04:45:52,940 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2019-12-27 04:45:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:45:52,940 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-27 04:45:52,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 04:45:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-27 04:45:52,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-27 04:45:53,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:45:53,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 04:45:53 BasicIcfg [2019-12-27 04:45:53,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 04:45:53,145 INFO L168 Benchmark]: Toolchain (without parser) took 98879.35 ms. Allocated memory was 145.2 MB in the beginning and 542.1 MB in the end (delta: 396.9 MB). Free memory was 101.7 MB in the beginning and 460.9 MB in the end (delta: -359.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,146 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 04:45:53,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 701.23 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.7 MB in the beginning and 162.1 MB in the end (delta: -60.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 202.4 MB. Free memory was 162.1 MB in the beginning and 160.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,147 INFO L168 Benchmark]: Boogie Preprocessor took 26.91 ms. Allocated memory is still 202.4 MB. Free memory was 160.2 MB in the beginning and 159.2 MB in the end (delta: 955.9 kB). Peak memory consumption was 955.9 kB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,147 INFO L168 Benchmark]: RCFGBuilder took 392.04 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 139.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,148 INFO L168 Benchmark]: TraceAbstraction took 97708.32 ms. Allocated memory was 202.4 MB in the beginning and 542.1 MB in the end (delta: 339.7 MB). Free memory was 138.7 MB in the beginning and 460.9 MB in the end (delta: -322.2 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:45:53,150 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 701.23 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.7 MB in the beginning and 162.1 MB in the end (delta: -60.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.05 ms. Allocated memory is still 202.4 MB. Free memory was 162.1 MB in the beginning and 160.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.91 ms. Allocated memory is still 202.4 MB. Free memory was 160.2 MB in the beginning and 159.2 MB in the end (delta: 955.9 kB). Peak memory consumption was 955.9 kB. Max. memory is 7.1 GB. * RCFGBuilder took 392.04 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 139.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 97708.32 ms. Allocated memory was 202.4 MB in the beginning and 542.1 MB in the end (delta: 339.7 MB). Free memory was 138.7 MB in the beginning and 460.9 MB in the end (delta: -322.2 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 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, 0 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: 97.5s, OverallIterations: 82, TraceHistogramMax: 21, AutomataDifference: 48.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1063 SDtfs, 2903 SDslu, 3730 SDs, 0 SdLazy, 5635 SolverSat, 6168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5586 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 3498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36288 ImplicationChecksByTransitivity, 60.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 82 MinimizatonAttempts, 975 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 25.2s InterpolantComputationTime, 4554 NumberOfCodeBlocks, 4554 NumberOfCodeBlocksAsserted, 579 NumberOfCheckSat, 4394 ConstructedInterpolants, 0 QuantifiedInterpolants, 446468 SizeOfPredicates, 1558 NumberOfNonLiveVariables, 13572 ConjunctsInSsa, 1990 ConjunctsInUnsatCore, 160 InterpolantComputations, 6 PerfectInterpolantSequences, 1180/22120 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...