/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/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 04:38:21,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:38:21,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:38:21,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:38:21,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:38:21,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:38:21,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:38:21,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:38:21,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:38:21,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:38:21,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:38:21,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:38:21,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:38:21,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:38:21,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:38:21,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:38:21,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:38:21,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:38:21,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:38:21,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 04:38:21,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 04:38:21,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:38:21,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:38:21,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:38:21,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 04:38:21,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 04:38:21,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 04:38:21,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 04:38:21,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 04:38:21,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 04:38:21,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:38:21,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:38:21,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:38:21,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:38:21,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:38:21,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:38:21,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:38:21,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:38:21,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:38:21,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:38:21,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:38:21,201 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 04:38:21,215 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:38:21,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:38:21,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:38:21,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:38:21,217 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:38:21,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:38:21,218 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:38:21,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:38:21,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:38:21,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:38:21,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:38:21,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:38:21,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:38:21,219 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:38:21,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:38:21,220 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:38:21,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:38:21,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:38:21,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:38:21,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:38:21,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:38:21,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:38:21,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:38:21,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:38:21,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:38:21,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:38:21,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:38:21,222 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:38:21,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:38:21,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:38:21,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:38:21,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:38:21,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:38:21,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:38:21,538 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:38:21,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-27 04:38:21,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea02f4526/cf0660abe15d4e86987a3e16e36f4c31/FLAG8a47c3455 [2019-12-27 04:38:22,122 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:38:22,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-27 04:38:22,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea02f4526/cf0660abe15d4e86987a3e16e36f4c31/FLAG8a47c3455 [2019-12-27 04:38:22,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea02f4526/cf0660abe15d4e86987a3e16e36f4c31 [2019-12-27 04:38:22,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:38:22,448 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:38:22,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:22,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:38:22,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:38:22,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cdc2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:22, skipping insertion in model container [2019-12-27 04:38:22,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:38:22,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:38:22,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:22,953 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:38:23,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,085 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:38:23,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23 WrapperNode [2019-12-27 04:38:23,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:23,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:38:23,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:38:23,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:38:23,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:38:23,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:38:23,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:38:23,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:38:23,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (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 04:38:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:38:23,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:38:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:38:23,229 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:38:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:38:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:38:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:38:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:38:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:38:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:38:23,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:38:23,233 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 04:38:23,595 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:38:23,595 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:38:23,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23 BoogieIcfgContainer [2019-12-27 04:38:23,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:38:23,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:38:23,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:38:23,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:38:23,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:38:22" (1/3) ... [2019-12-27 04:38:23,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb20deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (2/3) ... [2019-12-27 04:38:23,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb20deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23" (3/3) ... [2019-12-27 04:38:23,605 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2019-12-27 04:38:23,616 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:38:23,616 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:38:23,624 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:38:23,625 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:38:23,650 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,651 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,651 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,651 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,651 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,652 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,652 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,652 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,653 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,653 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,653 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,653 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,654 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,654 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,654 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,655 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,655 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,656 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,656 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,656 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,658 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,658 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,658 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,659 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,663 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,663 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,663 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,664 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,664 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,664 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,675 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,675 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,675 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,676 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,676 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,676 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:38:23,710 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:38:23,710 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:38:23,711 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:38:23,711 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:38:23,711 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:38:23,711 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:38:23,711 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:38:23,712 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:38:23,725 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 04:38:23,727 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,779 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,780 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,786 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,788 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,806 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,807 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,808 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,811 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 04:38:23,812 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:38:24,980 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 04:38:25,106 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-27 04:38:25,107 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 04:38:25,111 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:38:25,120 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:38:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:38:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:38:25,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,131 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:38:25,131 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-27 04:38:25,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966107518] [2019-12-27 04:38:25,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,351 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 04:38:25,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966107518] [2019-12-27 04:38:25,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:38:25,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186711895] [2019-12-27 04:38:25,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:38:25,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:38:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,378 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:38:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,416 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 04:38:25,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:38:25,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:38:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,432 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:38:25,432 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:38:25,433 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 04:38:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:38:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:38:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:38:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 04:38:25,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 04:38:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,504 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 04:38:25,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:38:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 04:38:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,505 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,505 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,505 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-27 04:38:25,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278921674] [2019-12-27 04:38:25,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,618 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 04:38:25,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278921674] [2019-12-27 04:38:25,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314719089] [2019-12-27 04:38:25,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,623 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 04:38:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,663 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-27 04:38:25,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,667 INFO L225 Difference]: With dead ends: 46 [2019-12-27 04:38:25,667 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 04:38:25,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 04:38:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-27 04:38:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 04:38:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-27 04:38:25,685 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-27 04:38:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,686 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-27 04:38:25,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-27 04:38:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,687 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,688 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-27 04:38:25,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166684715] [2019-12-27 04:38:25,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,761 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 04:38:25,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166684715] [2019-12-27 04:38:25,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488289528] [2019-12-27 04:38:25,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,764 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-27 04:38:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,789 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 04:38:25,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,791 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:38:25,792 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:38:25,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:38:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 04:38:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:38:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 04:38:25,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 04:38:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,800 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 04:38:25,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 04:38:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:25,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,802 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,802 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-27 04:38:25,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54082371] [2019-12-27 04:38:25,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,880 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 04:38:25,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54082371] [2019-12-27 04:38:25,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262153522] [2019-12-27 04:38:25,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:25,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:25,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:25,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:25,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,013 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 04:38:26,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204332218] [2019-12-27 04:38:26,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,016 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 04:38:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,093 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-27 04:38:26,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,095 INFO L225 Difference]: With dead ends: 60 [2019-12-27 04:38:26,095 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 04:38:26,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 04:38:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-27 04:38:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 04:38:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-27 04:38:26,112 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-27 04:38:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,112 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-27 04:38:26,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-27 04:38:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:26,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,113 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,317 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-27 04:38:26,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505684484] [2019-12-27 04:38:26,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,419 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 04:38:26,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505684484] [2019-12-27 04:38:26,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562691037] [2019-12-27 04:38:26,421 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,529 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 04:38:26,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605672240] [2019-12-27 04:38:26,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,531 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 8 states. [2019-12-27 04:38:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,585 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-27 04:38:26,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,587 INFO L225 Difference]: With dead ends: 61 [2019-12-27 04:38:26,587 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 04:38:26,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 04:38:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-27 04:38:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:38:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 04:38:26,594 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 04:38:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,594 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 04:38:26,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 04:38:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:26,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,596 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,799 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-27 04:38:26,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252153555] [2019-12-27 04:38:26,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252153555] [2019-12-27 04:38:26,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724714630] [2019-12-27 04:38:26,906 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:26,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638914849] [2019-12-27 04:38:27,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,037 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 04:38:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,115 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-27 04:38:27,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,117 INFO L225 Difference]: With dead ends: 72 [2019-12-27 04:38:27,117 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 04:38:27,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 04:38:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-27 04:38:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 04:38:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-27 04:38:27,130 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-27 04:38:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,131 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-27 04:38:27,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-27 04:38:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,132 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,336 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-27 04:38:27,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336813804] [2019-12-27 04:38:27,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,421 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 04:38:27,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336813804] [2019-12-27 04:38:27,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68403769] [2019-12-27 04:38:27,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,424 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-27 04:38:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,495 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 04:38:27,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,497 INFO L225 Difference]: With dead ends: 70 [2019-12-27 04:38:27,497 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 04:38:27,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:38:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 04:38:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-27 04:38:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 04:38:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-27 04:38:27,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-27 04:38:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,505 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-27 04:38:27,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-27 04:38:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,506 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,506 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,506 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-27 04:38:27,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835502018] [2019-12-27 04:38:27,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,561 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 04:38:27,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835502018] [2019-12-27 04:38:27,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997568023] [2019-12-27 04:38:27,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,563 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-27 04:38:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,610 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 04:38:27,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,612 INFO L225 Difference]: With dead ends: 70 [2019-12-27 04:38:27,612 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 04:38:27,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:38:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 04:38:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-27 04:38:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 04:38:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-27 04:38:27,618 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-27 04:38:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,619 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-27 04:38:27,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-27 04:38:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,619 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,620 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,620 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-27 04:38:27,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709053659] [2019-12-27 04:38:27,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709053659] [2019-12-27 04:38:27,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056929501] [2019-12-27 04:38:27,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076340358] [2019-12-27 04:38:27,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,772 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 10 states. [2019-12-27 04:38:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,857 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-27 04:38:27,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,858 INFO L225 Difference]: With dead ends: 75 [2019-12-27 04:38:27,859 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 04:38:27,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 04:38:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-27 04:38:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 04:38:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 04:38:27,874 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 04:38:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,874 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 04:38:27,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 04:38:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:27,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,875 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,077 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-27 04:38:28,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330240056] [2019-12-27 04:38:28,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,172 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 04:38:28,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330240056] [2019-12-27 04:38:28,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671686584] [2019-12-27 04:38:28,173 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:28,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:28,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,295 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 04:38:28,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:28,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458428681] [2019-12-27 04:38:28,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:28,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,297 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 04:38:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,396 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-27 04:38:28,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:28,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,397 INFO L225 Difference]: With dead ends: 86 [2019-12-27 04:38:28,398 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 04:38:28,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 04:38:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-27 04:38:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 04:38:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 04:38:28,403 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 04:38:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,404 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 04:38:28,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 04:38:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,405 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,609 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-27 04:38:28,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336767492] [2019-12-27 04:38:28,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,702 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 04:38:28,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336767492] [2019-12-27 04:38:28,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954937706] [2019-12-27 04:38:28,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:28,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,812 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 04:38:28,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:28,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497482154] [2019-12-27 04:38:28,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:28,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:28,814 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-27 04:38:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,877 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-27 04:38:28,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:28,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,878 INFO L225 Difference]: With dead ends: 90 [2019-12-27 04:38:28,879 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 04:38:28,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 04:38:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2019-12-27 04:38:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 04:38:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 04:38:28,884 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 04:38:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,884 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 04:38:28,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 04:38:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,885 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,885 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,086 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-27 04:38:29,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285978641] [2019-12-27 04:38:29,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,140 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 04:38:29,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285978641] [2019-12-27 04:38:29,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600216500] [2019-12-27 04:38:29,141 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 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 04:38:29,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:29,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,259 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 04:38:29,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468951061] [2019-12-27 04:38:29,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,262 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-27 04:38:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,340 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-27 04:38:29,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,342 INFO L225 Difference]: With dead ends: 90 [2019-12-27 04:38:29,342 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 04:38:29,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 04:38:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-12-27 04:38:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 04:38:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 04:38:29,347 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 04:38:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,348 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 04:38:29,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 04:38:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,349 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,558 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-27 04:38:29,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743131240] [2019-12-27 04:38:29,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,633 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 04:38:29,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743131240] [2019-12-27 04:38:29,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383543746] [2019-12-27 04:38:29,633 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,679 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:29,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,747 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 04:38:29,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816274816] [2019-12-27 04:38:29,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,751 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 10 states. [2019-12-27 04:38:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,871 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2019-12-27 04:38:29,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:29,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,872 INFO L225 Difference]: With dead ends: 98 [2019-12-27 04:38:29,873 INFO L226 Difference]: Without dead ends: 96 [2019-12-27 04:38:29,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-27 04:38:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2019-12-27 04:38:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 04:38:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-27 04:38:29,883 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-27 04:38:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,884 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-27 04:38:29,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-27 04:38:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,889 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,093 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 6 times [2019-12-27 04:38:30,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085189919] [2019-12-27 04:38:30,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,152 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 04:38:30,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085189919] [2019-12-27 04:38:30,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928058019] [2019-12-27 04:38:30,153 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,197 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:30,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,256 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 04:38:30,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785809912] [2019-12-27 04:38:30,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,258 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 10 states. [2019-12-27 04:38:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,374 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-27 04:38:30,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,376 INFO L225 Difference]: With dead ends: 90 [2019-12-27 04:38:30,377 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 04:38:30,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 04:38:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2019-12-27 04:38:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 04:38:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-27 04:38:30,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-27 04:38:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,382 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-27 04:38:30,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-27 04:38:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,383 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,586 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-27 04:38:30,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31417425] [2019-12-27 04:38:30,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,665 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 04:38:30,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31417425] [2019-12-27 04:38:30,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863047157] [2019-12-27 04:38:30,669 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 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 04:38:30,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:30,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,821 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 04:38:30,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:30,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757207050] [2019-12-27 04:38:30,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:30,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:30,823 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 12 states. [2019-12-27 04:38:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,934 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-27 04:38:30,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:30,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,936 INFO L225 Difference]: With dead ends: 90 [2019-12-27 04:38:30,936 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 04:38:30,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 04:38:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-27 04:38:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:38:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 04:38:30,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 04:38:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,942 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 04:38:30,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 04:38:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:30,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,943 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,152 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-27 04:38:31,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641725946] [2019-12-27 04:38:31,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641725946] [2019-12-27 04:38:31,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609841702] [2019-12-27 04:38:31,237 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 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 04:38:31,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:31,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:31,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247080958] [2019-12-27 04:38:31,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:31,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:31,411 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 04:38:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,530 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-27 04:38:31,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:31,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,537 INFO L225 Difference]: With dead ends: 101 [2019-12-27 04:38:31,537 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 04:38:31,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 04:38:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-27 04:38:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 04:38:31,544 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 04:38:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,544 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 04:38:31,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 04:38:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,545 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,545 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,746 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,746 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 7 times [2019-12-27 04:38:31,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695420560] [2019-12-27 04:38:31,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695420560] [2019-12-27 04:38:31,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527058276] [2019-12-27 04:38:31,808 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 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 04:38:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:31,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878983051] [2019-12-27 04:38:31,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:31,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:31,936 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-27 04:38:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,069 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2019-12-27 04:38:32,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:32,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,070 INFO L225 Difference]: With dead ends: 108 [2019-12-27 04:38:32,070 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 04:38:32,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 04:38:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-27 04:38:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 04:38:32,075 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 04:38:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,075 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 04:38:32,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 04:38:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,076 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,076 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,279 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 8 times [2019-12-27 04:38:32,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410127527] [2019-12-27 04:38:32,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,340 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 04:38:32,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410127527] [2019-12-27 04:38:32,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106223129] [2019-12-27 04:38:32,340 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 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 04:38:32,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:32,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:32,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,558 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 04:38:32,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732138533] [2019-12-27 04:38:32,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,561 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-27 04:38:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,677 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2019-12-27 04:38:32,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:32,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,678 INFO L225 Difference]: With dead ends: 112 [2019-12-27 04:38:32,678 INFO L226 Difference]: Without dead ends: 110 [2019-12-27 04:38:32,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-27 04:38:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2019-12-27 04:38:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 04:38:32,682 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 04:38:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,682 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 04:38:32,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 04:38:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,683 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,683 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,886 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 9 times [2019-12-27 04:38:32,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807292390] [2019-12-27 04:38:32,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807292390] [2019-12-27 04:38:32,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135342576] [2019-12-27 04:38:32,947 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:33,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583660444] [2019-12-27 04:38:33,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,198 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-27 04:38:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,386 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-27 04:38:33,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:33,386 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,387 INFO L225 Difference]: With dead ends: 113 [2019-12-27 04:38:33,387 INFO L226 Difference]: Without dead ends: 112 [2019-12-27 04:38:33,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-27 04:38:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2019-12-27 04:38:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 04:38:33,392 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 04:38:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,392 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 04:38:33,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 04:38:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,393 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,594 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,595 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 10 times [2019-12-27 04:38:33,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51737370] [2019-12-27 04:38:33,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,680 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 04:38:33,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51737370] [2019-12-27 04:38:33,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343429653] [2019-12-27 04:38:33,680 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:33,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,830 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 04:38:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079257733] [2019-12-27 04:38:33,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,832 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-27 04:38:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,997 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2019-12-27 04:38:33,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:33,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,999 INFO L225 Difference]: With dead ends: 119 [2019-12-27 04:38:33,999 INFO L226 Difference]: Without dead ends: 117 [2019-12-27 04:38:33,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-27 04:38:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2019-12-27 04:38:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 04:38:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-27 04:38:34,002 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-27 04:38:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,003 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-27 04:38:34,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-27 04:38:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,003 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,204 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 11 times [2019-12-27 04:38:34,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024141299] [2019-12-27 04:38:34,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,270 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 04:38:34,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024141299] [2019-12-27 04:38:34,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104004872] [2019-12-27 04:38:34,271 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,326 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:34,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,392 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 04:38:34,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90213902] [2019-12-27 04:38:34,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,394 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 12 states. [2019-12-27 04:38:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,576 INFO L93 Difference]: Finished difference Result 123 states and 256 transitions. [2019-12-27 04:38:34,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,578 INFO L225 Difference]: With dead ends: 123 [2019-12-27 04:38:34,578 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 04:38:34,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 04:38:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2019-12-27 04:38:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 04:38:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 04:38:34,583 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 04:38:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,583 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 04:38:34,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 04:38:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,584 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,789 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 12 times [2019-12-27 04:38:34,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718474517] [2019-12-27 04:38:34,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718474517] [2019-12-27 04:38:34,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403392393] [2019-12-27 04:38:34,846 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,902 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:34,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811269306] [2019-12-27 04:38:34,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,976 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 12 states. [2019-12-27 04:38:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,164 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2019-12-27 04:38:35,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:35,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,167 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:35,167 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:35,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:38:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2019-12-27 04:38:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 04:38:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 200 transitions. [2019-12-27 04:38:35,172 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 200 transitions. Word has length 11 [2019-12-27 04:38:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,172 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 200 transitions. [2019-12-27 04:38:35,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 200 transitions. [2019-12-27 04:38:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,173 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,377 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 13 times [2019-12-27 04:38:35,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138044398] [2019-12-27 04:38:35,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,434 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 04:38:35,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138044398] [2019-12-27 04:38:35,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142854453] [2019-12-27 04:38:35,435 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,585 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 04:38:35,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972970089] [2019-12-27 04:38:35,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,586 INFO L87 Difference]: Start difference. First operand 90 states and 200 transitions. Second operand 12 states. [2019-12-27 04:38:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,732 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-27 04:38:35,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:35,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,734 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:35,734 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 04:38:35,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 04:38:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-27 04:38:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-27 04:38:35,738 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-27 04:38:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,738 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-27 04:38:35,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-27 04:38:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,739 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,946 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-27 04:38:35,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642608210] [2019-12-27 04:38:35,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642608210] [2019-12-27 04:38:36,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363054226] [2019-12-27 04:38:36,011 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 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 04:38:36,061 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:36,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:36,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459015369] [2019-12-27 04:38:36,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:36,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:36,161 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 14 states. [2019-12-27 04:38:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,271 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-27 04:38:36,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:36,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,272 INFO L225 Difference]: With dead ends: 105 [2019-12-27 04:38:36,272 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 04:38:36,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 04:38:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-27 04:38:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 04:38:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 04:38:36,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 04:38:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,276 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 04:38:36,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 04:38:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,276 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,277 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,479 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-27 04:38:36,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473547895] [2019-12-27 04:38:36,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473547895] [2019-12-27 04:38:36,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038705984] [2019-12-27 04:38:36,580 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 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 04:38:36,636 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:36,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:36,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065406096] [2019-12-27 04:38:36,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:36,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:36,734 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-27 04:38:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,921 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-27 04:38:36,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:36,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,923 INFO L225 Difference]: With dead ends: 116 [2019-12-27 04:38:36,923 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:36,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-27 04:38:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 04:38:36,927 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 04:38:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,927 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 04:38:36,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 04:38:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,928 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,132 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 14 times [2019-12-27 04:38:37,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52379100] [2019-12-27 04:38:37,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,206 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 04:38:37,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52379100] [2019-12-27 04:38:37,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400050729] [2019-12-27 04:38:37,206 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 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 04:38:37,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:37,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,342 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 04:38:37,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:37,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877648950] [2019-12-27 04:38:37,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:37,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:37,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:37,345 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-27 04:38:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,579 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-27 04:38:37,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:37,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,581 INFO L225 Difference]: With dead ends: 125 [2019-12-27 04:38:37,581 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 04:38:37,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 04:38:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 04:38:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 04:38:37,586 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 04:38:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,586 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 04:38:37,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 04:38:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,588 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,588 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,791 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 15 times [2019-12-27 04:38:37,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555070166] [2019-12-27 04:38:37,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,867 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 04:38:37,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555070166] [2019-12-27 04:38:37,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311592137] [2019-12-27 04:38:37,868 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 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 04:38:37,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:37,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:38,016 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 04:38:38,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:38,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:38,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438553079] [2019-12-27 04:38:38,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:38,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:38,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:38,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:38,018 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-27 04:38:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,303 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2019-12-27 04:38:38,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:38,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,304 INFO L225 Difference]: With dead ends: 134 [2019-12-27 04:38:38,304 INFO L226 Difference]: Without dead ends: 133 [2019-12-27 04:38:38,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-27 04:38:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2019-12-27 04:38:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 04:38:38,310 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 04:38:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,310 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 04:38:38,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 04:38:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,311 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,515 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 16 times [2019-12-27 04:38:38,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672513854] [2019-12-27 04:38:38,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,602 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 04:38:38,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672513854] [2019-12-27 04:38:38,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541745323] [2019-12-27 04:38:38,603 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 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 04:38:38,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:38,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:39,668 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 04:38:39,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:39,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:39,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250155419] [2019-12-27 04:38:39,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:39,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:39,670 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-27 04:38:40,126 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-27 04:38:40,563 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 04:38:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:41,382 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-27 04:38:41,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:41,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:41,383 INFO L225 Difference]: With dead ends: 140 [2019-12-27 04:38:41,384 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 04:38:41,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=316, Unknown=1, NotChecked=0, Total=462 [2019-12-27 04:38:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 04:38:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2019-12-27 04:38:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 04:38:41,389 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 04:38:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:41,389 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 04:38:41,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 04:38:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:41,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:41,390 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,593 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 17 times [2019-12-27 04:38:41,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934100906] [2019-12-27 04:38:41,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,658 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 04:38:41,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934100906] [2019-12-27 04:38:41,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576930790] [2019-12-27 04:38:41,660 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 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 04:38:41,706 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:41,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:41,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,801 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 04:38:41,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941628602] [2019-12-27 04:38:41,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,803 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-27 04:38:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,030 INFO L93 Difference]: Finished difference Result 133 states and 280 transitions. [2019-12-27 04:38:42,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:42,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,032 INFO L225 Difference]: With dead ends: 133 [2019-12-27 04:38:42,033 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 04:38:42,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 04:38:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 04:38:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 04:38:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 04:38:42,037 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 04:38:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,038 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 04:38:42,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 04:38:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,039 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,242 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,243 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 18 times [2019-12-27 04:38:42,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319781359] [2019-12-27 04:38:42,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,310 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 04:38:42,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319781359] [2019-12-27 04:38:42,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864651582] [2019-12-27 04:38:42,310 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 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 04:38:42,365 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:42,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:42,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,483 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 04:38:42,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180506436] [2019-12-27 04:38:42,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,485 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,771 INFO L93 Difference]: Finished difference Result 148 states and 313 transitions. [2019-12-27 04:38:42,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:42,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,772 INFO L225 Difference]: With dead ends: 148 [2019-12-27 04:38:42,773 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:38:42,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:38:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-12-27 04:38:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 04:38:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 04:38:42,778 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 04:38:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,778 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 04:38:42,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 04:38:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,779 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,983 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 19 times [2019-12-27 04:38:42,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347886274] [2019-12-27 04:38:42,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,071 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 04:38:43,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347886274] [2019-12-27 04:38:43,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506235815] [2019-12-27 04:38:43,072 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 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 04:38:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:43,236 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 04:38:43,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:43,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:43,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019065328] [2019-12-27 04:38:43,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:43,238 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,531 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2019-12-27 04:38:43,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:43,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,533 INFO L225 Difference]: With dead ends: 142 [2019-12-27 04:38:43,534 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 04:38:43,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 04:38:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2019-12-27 04:38:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 04:38:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2019-12-27 04:38:43,539 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 12 [2019-12-27 04:38:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,540 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2019-12-27 04:38:43,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2019-12-27 04:38:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,541 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,744 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 20 times [2019-12-27 04:38:43,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170334306] [2019-12-27 04:38:43,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,815 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 04:38:43,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170334306] [2019-12-27 04:38:43,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40290485] [2019-12-27 04:38:43,815 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 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 04:38:43,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:43,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:43,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,006 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 04:38:44,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76110504] [2019-12-27 04:38:44,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,008 INFO L87 Difference]: Start difference. First operand 104 states and 237 transitions. Second operand 14 states. [2019-12-27 04:38:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,316 INFO L93 Difference]: Finished difference Result 139 states and 294 transitions. [2019-12-27 04:38:44,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:44,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,317 INFO L225 Difference]: With dead ends: 139 [2019-12-27 04:38:44,318 INFO L226 Difference]: Without dead ends: 138 [2019-12-27 04:38:44,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-27 04:38:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2019-12-27 04:38:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 04:38:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 04:38:44,322 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 04:38:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,323 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 04:38:44,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 04:38:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,323 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,324 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,527 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 21 times [2019-12-27 04:38:44,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848557044] [2019-12-27 04:38:44,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,592 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 04:38:44,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848557044] [2019-12-27 04:38:44,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198995695] [2019-12-27 04:38:44,593 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 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 04:38:44,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:44,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,754 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 04:38:44,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202333979] [2019-12-27 04:38:44,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,756 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:45,265 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2019-12-27 04:38:45,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:45,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:45,268 INFO L225 Difference]: With dead ends: 152 [2019-12-27 04:38:45,268 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 04:38:45,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 04:38:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2019-12-27 04:38:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 04:38:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 04:38:45,273 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 04:38:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:45,273 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 04:38:45,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 04:38:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:45,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:45,274 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:45,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,477 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:45,478 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 22 times [2019-12-27 04:38:45,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:45,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393238200] [2019-12-27 04:38:45,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,561 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 04:38:45,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393238200] [2019-12-27 04:38:45,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286281076] [2019-12-27 04:38:45,562 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:45,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,720 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 04:38:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234271053] [2019-12-27 04:38:45,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,722 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,048 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-27 04:38:46,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:46,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,050 INFO L225 Difference]: With dead ends: 146 [2019-12-27 04:38:46,050 INFO L226 Difference]: Without dead ends: 144 [2019-12-27 04:38:46,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-27 04:38:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2019-12-27 04:38:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 04:38:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 228 transitions. [2019-12-27 04:38:46,054 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 228 transitions. Word has length 12 [2019-12-27 04:38:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,055 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 228 transitions. [2019-12-27 04:38:46,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 228 transitions. [2019-12-27 04:38:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,056 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,259 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 23 times [2019-12-27 04:38:46,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005317443] [2019-12-27 04:38:46,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:46,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005317443] [2019-12-27 04:38:46,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581189078] [2019-12-27 04:38:46,347 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:46,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:46,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:46,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:46,488 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 04:38:46,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:46,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:46,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826802126] [2019-12-27 04:38:46,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:46,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:46,490 INFO L87 Difference]: Start difference. First operand 101 states and 228 transitions. Second operand 14 states. [2019-12-27 04:38:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,737 INFO L93 Difference]: Finished difference Result 158 states and 329 transitions. [2019-12-27 04:38:46,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:46,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,738 INFO L225 Difference]: With dead ends: 158 [2019-12-27 04:38:46,739 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 04:38:46,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 04:38:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2019-12-27 04:38:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 04:38:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-27 04:38:46,744 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-27 04:38:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,744 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-27 04:38:46,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-27 04:38:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,745 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,745 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,949 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 24 times [2019-12-27 04:38:46,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514710824] [2019-12-27 04:38:46,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,027 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 04:38:47,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514710824] [2019-12-27 04:38:47,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435380424] [2019-12-27 04:38:47,028 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,064 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:47,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,161 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 04:38:47,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913316206] [2019-12-27 04:38:47,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,163 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-27 04:38:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:47,376 INFO L93 Difference]: Finished difference Result 154 states and 328 transitions. [2019-12-27 04:38:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:47,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:47,378 INFO L225 Difference]: With dead ends: 154 [2019-12-27 04:38:47,379 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 04:38:47,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 04:38:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2019-12-27 04:38:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 04:38:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-27 04:38:47,384 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-27 04:38:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:47,384 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-27 04:38:47,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-27 04:38:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:47,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:47,385 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,587 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 25 times [2019-12-27 04:38:47,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511641240] [2019-12-27 04:38:47,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,660 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 04:38:47,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511641240] [2019-12-27 04:38:47,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510377326] [2019-12-27 04:38:47,661 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,821 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 04:38:47,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557267010] [2019-12-27 04:38:47,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,823 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-27 04:38:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,105 INFO L93 Difference]: Finished difference Result 150 states and 318 transitions. [2019-12-27 04:38:48,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:48,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,107 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:48,107 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 04:38:48,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 04:38:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2019-12-27 04:38:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 04:38:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-27 04:38:48,112 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-27 04:38:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,112 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-27 04:38:48,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-27 04:38:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,113 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,314 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 26 times [2019-12-27 04:38:48,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17212440] [2019-12-27 04:38:48,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:48,387 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 04:38:48,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17212440] [2019-12-27 04:38:48,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510520486] [2019-12-27 04:38:48,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:48,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:48,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:48,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,519 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 04:38:48,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244526191] [2019-12-27 04:38:48,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,521 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-27 04:38:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,747 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-27 04:38:48,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:48,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,748 INFO L225 Difference]: With dead ends: 133 [2019-12-27 04:38:48,748 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 04:38:48,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 04:38:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2019-12-27 04:38:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 04:38:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 04:38:48,752 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 04:38:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,752 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 04:38:48,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 04:38:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,753 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,956 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 27 times [2019-12-27 04:38:48,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412892562] [2019-12-27 04:38:48,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,038 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 04:38:49,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412892562] [2019-12-27 04:38:49,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401941901] [2019-12-27 04:38:49,039 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:49,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,169 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 04:38:49,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:49,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249652929] [2019-12-27 04:38:49,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:49,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:49,171 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,383 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-27 04:38:49,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:49,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,385 INFO L225 Difference]: With dead ends: 140 [2019-12-27 04:38:49,385 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 04:38:49,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 04:38:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2019-12-27 04:38:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 04:38:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 04:38:49,392 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 04:38:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,392 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 04:38:49,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 04:38:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:49,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,393 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,596 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 28 times [2019-12-27 04:38:49,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367993691] [2019-12-27 04:38:49,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,651 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 04:38:49,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367993691] [2019-12-27 04:38:49,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531238177] [2019-12-27 04:38:49,651 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:49,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:49,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271275179] [2019-12-27 04:38:49,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:49,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:49,817 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 14 states. [2019-12-27 04:38:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,136 INFO L93 Difference]: Finished difference Result 125 states and 256 transitions. [2019-12-27 04:38:50,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:50,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,138 INFO L225 Difference]: With dead ends: 125 [2019-12-27 04:38:50,138 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 04:38:50,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 04:38:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2019-12-27 04:38:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 04:38:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-27 04:38:50,144 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-27 04:38:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,144 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-27 04:38:50,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-27 04:38:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:50,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,146 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,350 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-27 04:38:50,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172833461] [2019-12-27 04:38:50,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172833461] [2019-12-27 04:38:50,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941150896] [2019-12-27 04:38:50,476 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 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 04:38:50,543 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:50,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:50,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:50,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:50,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468342081] [2019-12-27 04:38:50,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:50,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:50,692 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 16 states. [2019-12-27 04:38:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,842 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-27 04:38:50,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:50,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,844 INFO L225 Difference]: With dead ends: 120 [2019-12-27 04:38:50,844 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:50,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-27 04:38:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 04:38:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 04:38:50,849 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 04:38:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,850 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 04:38:50,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 04:38:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:50,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,850 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,054 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-27 04:38:51,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64467909] [2019-12-27 04:38:51,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64467909] [2019-12-27 04:38:51,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211746332] [2019-12-27 04:38:51,146 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 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 04:38:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:38:51,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696829382] [2019-12-27 04:38:51,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:38:51,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:38:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:51,326 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 18 states. [2019-12-27 04:38:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:51,503 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 04:38:51,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:51,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-27 04:38:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:51,505 INFO L225 Difference]: With dead ends: 131 [2019-12-27 04:38:51,505 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 04:38:51,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 04:38:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-27 04:38:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:38:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:38:51,509 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:38:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:51,509 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:38:51,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:38:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:38:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:51,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:51,510 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,713 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 29 times [2019-12-27 04:38:51,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477150116] [2019-12-27 04:38:51,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477150116] [2019-12-27 04:38:51,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539572846] [2019-12-27 04:38:51,802 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 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 04:38:51,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:51,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:51,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:51,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557700033] [2019-12-27 04:38:51,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:51,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:51,968 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:38:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:52,268 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-27 04:38:52,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:52,268 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:52,270 INFO L225 Difference]: With dead ends: 149 [2019-12-27 04:38:52,270 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 04:38:52,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:38:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 04:38:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 04:38:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:38:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:38:52,274 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:38:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:52,274 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:38:52,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:38:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:52,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:52,275 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:52,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:52,477 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:52,478 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 30 times [2019-12-27 04:38:52,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:52,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668930177] [2019-12-27 04:38:52,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:52,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668930177] [2019-12-27 04:38:52,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804503102] [2019-12-27 04:38:52,558 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 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 04:38:52,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:52,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:52,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:52,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:52,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:52,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:52,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058755547] [2019-12-27 04:38:52,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:52,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:52,704 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:38:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:53,033 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-27 04:38:53,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:53,034 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:53,035 INFO L225 Difference]: With dead ends: 157 [2019-12-27 04:38:53,035 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 04:38:53,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 04:38:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2019-12-27 04:38:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:38:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:38:53,039 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:38:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:53,040 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:38:53,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:38:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:53,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:53,040 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,244 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,244 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 31 times [2019-12-27 04:38:53,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701390372] [2019-12-27 04:38:53,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:53,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701390372] [2019-12-27 04:38:53,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283474080] [2019-12-27 04:38:53,324 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 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 04:38:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,374 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:53,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:54,018 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 04:38:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:54,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:54,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:54,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628248845] [2019-12-27 04:38:54,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:54,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:54,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:38:54,020 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:38:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:55,479 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2019-12-27 04:38:55,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:55,480 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:55,480 INFO L225 Difference]: With dead ends: 162 [2019-12-27 04:38:55,480 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 04:38:55,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=224, Invalid=477, Unknown=1, NotChecked=0, Total=702 [2019-12-27 04:38:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 04:38:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 111. [2019-12-27 04:38:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:38:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:38:55,485 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:38:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:55,485 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:38:55,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:38:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:55,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:55,486 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:55,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:55,690 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 32 times [2019-12-27 04:38:55,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:55,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840416212] [2019-12-27 04:38:55,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:55,779 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 04:38:55,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840416212] [2019-12-27 04:38:55,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722022268] [2019-12-27 04:38:55,780 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 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 04:38:55,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:55,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:55,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:55,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:56,025 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 04:38:56,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:56,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:56,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808096056] [2019-12-27 04:38:56,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:56,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:56,028 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:38:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:56,430 INFO L93 Difference]: Finished difference Result 165 states and 347 transitions. [2019-12-27 04:38:56,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:56,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:56,432 INFO L225 Difference]: With dead ends: 165 [2019-12-27 04:38:56,433 INFO L226 Difference]: Without dead ends: 163 [2019-12-27 04:38:56,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:38:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-27 04:38:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2019-12-27 04:38:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:38:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:38:56,437 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:38:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:56,438 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:38:56,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:38:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:56,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:56,439 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:56,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:56,642 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 33 times [2019-12-27 04:38:56,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:56,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19228938] [2019-12-27 04:38:56,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:56,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19228938] [2019-12-27 04:38:56,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872489040] [2019-12-27 04:38:56,722 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 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 04:38:56,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:56,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:56,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:56,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:57,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:57,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:57,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533009737] [2019-12-27 04:38:57,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:57,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:57,437 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:38:57,780 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:38:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:58,393 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2019-12-27 04:38:58,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:58,393 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:58,395 INFO L225 Difference]: With dead ends: 168 [2019-12-27 04:38:58,395 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 04:38:58,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-27 04:38:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 04:38:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 112. [2019-12-27 04:38:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 04:38:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 04:38:58,399 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 04:38:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:58,399 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 04:38:58,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 04:38:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:58,400 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:58,400 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:58,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:58,603 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 34 times [2019-12-27 04:38:58,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:58,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141813808] [2019-12-27 04:38:58,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:58,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141813808] [2019-12-27 04:38:58,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982936812] [2019-12-27 04:38:58,694 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 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 04:38:58,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:58,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:58,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:58,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:01,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:01,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:01,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656743591] [2019-12-27 04:39:01,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:01,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:01,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:01,710 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-27 04:39:02,122 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-27 04:39:03,652 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:03,672 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2019-12-27 04:39:03,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:03,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:03,674 INFO L225 Difference]: With dead ends: 172 [2019-12-27 04:39:03,674 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 04:39:03,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=196, Invalid=451, Unknown=3, NotChecked=0, Total=650 [2019-12-27 04:39:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 04:39:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2019-12-27 04:39:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 04:39:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 04:39:03,679 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 04:39:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:03,679 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 04:39:03,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 04:39:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:03,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:03,680 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:03,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:03,883 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 35 times [2019-12-27 04:39:03,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:03,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132996731] [2019-12-27 04:39:03,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:03,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132996731] [2019-12-27 04:39:03,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260930763] [2019-12-27 04:39:03,993 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 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 04:39:04,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:04,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:04,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:04,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:05,158 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 04:39:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:06,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:06,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:06,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807366894] [2019-12-27 04:39:06,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:06,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:06,408 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-27 04:39:07,684 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:08,208 INFO L93 Difference]: Finished difference Result 173 states and 360 transitions. [2019-12-27 04:39:08,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:08,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:08,210 INFO L225 Difference]: With dead ends: 173 [2019-12-27 04:39:08,210 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 04:39:08,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 04:39:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2019-12-27 04:39:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 04:39:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 04:39:08,214 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 04:39:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:08,214 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 04:39:08,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 04:39:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:08,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:08,215 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:08,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:08,418 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 36 times [2019-12-27 04:39:08,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:08,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714581622] [2019-12-27 04:39:08,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:08,509 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 04:39:08,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714581622] [2019-12-27 04:39:08,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325122448] [2019-12-27 04:39:08,510 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 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 04:39:08,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:08,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:08,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:08,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:08,689 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 04:39:08,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:08,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:08,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439589051] [2019-12-27 04:39:08,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:08,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:08,690 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-27 04:39:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:09,151 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2019-12-27 04:39:09,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:09,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:09,153 INFO L225 Difference]: With dead ends: 182 [2019-12-27 04:39:09,153 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 04:39:09,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:39:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 04:39:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 116. [2019-12-27 04:39:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 04:39:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-27 04:39:09,156 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-27 04:39:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:09,157 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-27 04:39:09,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-27 04:39:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:09,157 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:09,157 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:09,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:09,358 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 37 times [2019-12-27 04:39:09,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:09,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908286131] [2019-12-27 04:39:09,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:09,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908286131] [2019-12-27 04:39:09,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782037182] [2019-12-27 04:39:09,441 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 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 04:39:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:09,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:09,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:09,781 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 04:39:09,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:09,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:09,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870321594] [2019-12-27 04:39:09,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:09,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:09,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:09,783 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-27 04:39:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:10,886 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-27 04:39:10,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:10,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:10,888 INFO L225 Difference]: With dead ends: 186 [2019-12-27 04:39:10,888 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 04:39:10,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 04:39:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2019-12-27 04:39:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 04:39:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-27 04:39:10,893 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-27 04:39:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:10,894 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-27 04:39:10,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-27 04:39:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:10,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:10,895 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:11,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:11,098 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 38 times [2019-12-27 04:39:11,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:11,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147683174] [2019-12-27 04:39:11,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:11,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147683174] [2019-12-27 04:39:11,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711051891] [2019-12-27 04:39:11,194 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 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 04:39:11,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:11,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:11,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:11,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:11,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:11,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:11,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028325331] [2019-12-27 04:39:11,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:11,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:11,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:11,414 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-27 04:39:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:12,373 INFO L93 Difference]: Finished difference Result 180 states and 380 transitions. [2019-12-27 04:39:12,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:12,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:12,375 INFO L225 Difference]: With dead ends: 180 [2019-12-27 04:39:12,375 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 04:39:12,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=533, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:12,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 04:39:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2019-12-27 04:39:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 04:39:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 268 transitions. [2019-12-27 04:39:12,380 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 268 transitions. Word has length 13 [2019-12-27 04:39:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:12,381 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 268 transitions. [2019-12-27 04:39:12,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 268 transitions. [2019-12-27 04:39:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:12,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:12,382 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:12,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:12,585 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 39 times [2019-12-27 04:39:12,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:12,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254322172] [2019-12-27 04:39:12,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:12,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254322172] [2019-12-27 04:39:12,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998213717] [2019-12-27 04:39:12,659 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 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 04:39:12,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:39:12,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:12,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:12,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:12,868 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 04:39:12,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:12,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:12,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359457880] [2019-12-27 04:39:12,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:12,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:12,869 INFO L87 Difference]: Start difference. First operand 115 states and 268 transitions. Second operand 16 states. [2019-12-27 04:39:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:13,327 INFO L93 Difference]: Finished difference Result 167 states and 357 transitions. [2019-12-27 04:39:13,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:13,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:13,329 INFO L225 Difference]: With dead ends: 167 [2019-12-27 04:39:13,329 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 04:39:13,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 04:39:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 116. [2019-12-27 04:39:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 04:39:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-27 04:39:13,332 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-27 04:39:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:13,333 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-27 04:39:13,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-27 04:39:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:13,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:13,334 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:13,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:13,537 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 40 times [2019-12-27 04:39:13,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:13,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114383660] [2019-12-27 04:39:13,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:13,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114383660] [2019-12-27 04:39:13,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607084044] [2019-12-27 04:39:13,625 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 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 04:39:13,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:13,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:13,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:13,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:13,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:13,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:13,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68745659] [2019-12-27 04:39:13,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:13,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:13,882 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-27 04:39:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:14,506 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2019-12-27 04:39:14,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:14,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:14,508 INFO L225 Difference]: With dead ends: 174 [2019-12-27 04:39:14,508 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 04:39:14,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 04:39:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2019-12-27 04:39:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 04:39:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-27 04:39:14,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-27 04:39:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:14,513 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-27 04:39:14,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-27 04:39:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:14,513 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:14,513 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:14,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:14,714 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:14,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 41 times [2019-12-27 04:39:14,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:14,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170124553] [2019-12-27 04:39:14,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:14,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170124553] [2019-12-27 04:39:14,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390904675] [2019-12-27 04:39:14,803 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 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 04:39:14,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:14,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:14,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:14,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:15,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:15,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:15,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786566102] [2019-12-27 04:39:15,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:15,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:15,104 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown