/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:06,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:06,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:06,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:06,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:06,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:06,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:06,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:06,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:06,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:06,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:06,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:06,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:06,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:06,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:06,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:06,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:06,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:06,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:06,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:06,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:06,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:06,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:06,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:06,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:06,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:06,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:06,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:06,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:06,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:06,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:06,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:06,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:06,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:06,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:06,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:06,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:06,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:06,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:06,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:06,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:06,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf [2019-12-27 15:07:06,216 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:06,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:06,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:06,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:06,218 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:06,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:06,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:06,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:06,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:06,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:06,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:06,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:06,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:06,221 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:06,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:06,222 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:06,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:06,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:06,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:06,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:06,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:06,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:06,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:06,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:06,224 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:06,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:07:06,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:07:06,535 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:06,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:06,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:07:06,540 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:07:06,541 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 15:07:06,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7144fc984/6fc6b1abc3744e388c59485fcdb8ec31/FLAG3ac817f81 [2019-12-27 15:07:07,170 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:07,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 15:07:07,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7144fc984/6fc6b1abc3744e388c59485fcdb8ec31/FLAG3ac817f81 [2019-12-27 15:07:07,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7144fc984/6fc6b1abc3744e388c59485fcdb8ec31 [2019-12-27 15:07:07,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:07,493 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:07,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:07,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:07,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:07,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a7ff5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:07, skipping insertion in model container [2019-12-27 15:07:07,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:07,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:08,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,077 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:08,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,221 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:08,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08 WrapperNode [2019-12-27 15:07:08,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:08,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:08,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:08,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:08,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:08,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:08,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:08,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:08,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:07:08,353 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:07:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:07:08,354 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:07:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:07:08,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:08,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:08,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:07:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:08,358 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 15:07:08,687 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:08,687 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:07:08,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08 BoogieIcfgContainer [2019-12-27 15:07:08,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:08,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:08,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:08,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:08,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:07" (1/3) ... [2019-12-27 15:07:08,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22db07e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (2/3) ... [2019-12-27 15:07:08,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22db07e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08" (3/3) ... [2019-12-27 15:07:08,697 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-27 15:07:08,710 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:08,710 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:08,718 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:08,719 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:08,756 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,757 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,757 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,757 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,758 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,758 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,759 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,759 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,759 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,759 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,760 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,760 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,760 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,760 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,761 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,761 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,761 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,762 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,762 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,762 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,763 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,763 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,763 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,764 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,764 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,764 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,764 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,765 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,765 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,765 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,779 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,779 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,779 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,780 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,780 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,780 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,795 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:08,814 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:08,814 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:08,814 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:08,814 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:08,815 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:08,815 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:08,815 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:08,815 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:08,829 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 15:07:08,831 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,884 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,884 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,890 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,893 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,911 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,911 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,912 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,915 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 15:07:08,916 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:10,208 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 15:07:10,332 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 15:07:10,333 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 15:07:10,337 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:07:10,348 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:07:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:07:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:07:10,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,359 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:07:10,360 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,367 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 15:07:10,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269061319] [2019-12-27 15:07:10,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:10,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269061319] [2019-12-27 15:07:10,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:07:10,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419687795] [2019-12-27 15:07:10,670 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,678 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,698 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:07:10,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,706 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:10,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,728 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:07:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,771 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 15:07:10,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:10,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:07:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,799 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:10,800 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:07:10,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:07:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:07:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:07:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 15:07:10,861 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 15:07:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,868 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 15:07:10,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 15:07:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,870 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 15:07:10,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696697813] [2019-12-27 15:07:10,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:10,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696697813] [2019-12-27 15:07:10,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:10,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [703789196] [2019-12-27 15:07:10,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,988 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,990 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:10,990 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,990 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:10,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,993 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 15:07:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,022 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 15:07:11,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:11,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,026 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:07:11,026 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:07:11,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:07:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 15:07:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 15:07:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 15:07:11,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 15:07:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,038 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 15:07:11,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 15:07:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:11,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,039 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,040 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,040 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 15:07:11,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078993361] [2019-12-27 15:07:11,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078993361] [2019-12-27 15:07:11,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:11,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:11,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [702769698] [2019-12-27 15:07:11,153 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,153 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,160 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:07:11,160 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,168 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:11,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:11,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:11,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,169 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 15:07:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,184 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 15:07:11,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:11,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,186 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:11,186 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:11,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 15:07:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:07:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 15:07:11,194 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 15:07:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,194 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 15:07:11,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 15:07:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,195 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,196 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,196 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 15:07:11,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69187695] [2019-12-27 15:07:11,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69187695] [2019-12-27 15:07:11,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397097516] [2019-12-27 15:07:11,263 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 15:07:11,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [302430970] [2019-12-27 15:07:11,421 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,422 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,425 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:11,425 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:11,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,427 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 15:07:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,459 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 15:07:11,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,462 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:07:11,463 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:07:11,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:07:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 15:07:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:07:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 15:07:11,481 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 15:07:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,482 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 15:07:11,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 15:07:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,483 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,684 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 15:07:11,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56778179] [2019-12-27 15:07:11,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56778179] [2019-12-27 15:07:11,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757197023] [2019-12-27 15:07:11,761 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 15:07:11,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536165203] [2019-12-27 15:07:11,863 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,864 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,866 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 15:07:11,866 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,869 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:07:11,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,871 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 5 states. [2019-12-27 15:07:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,909 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 15:07:11,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,912 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:07:11,912 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:07:11,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:07:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:07:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 15:07:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 15:07:11,931 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 15:07:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,931 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 15:07:11,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 15:07:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:11,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,932 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,139 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 15:07:12,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643472407] [2019-12-27 15:07:12,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,217 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 15:07:12,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643472407] [2019-12-27 15:07:12,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705329838] [2019-12-27 15:07:12,218 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 15:07:12,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,354 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 15:07:12,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975910078] [2019-12-27 15:07:12,355 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,359 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,361 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:12,361 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,361 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,362 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 15:07:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,389 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 15:07:12,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,391 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:07:12,391 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:12,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 15:07:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:07:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 15:07:12,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 15:07:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,404 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 15:07:12,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 15:07:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,405 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,607 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 15:07:12,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074230302] [2019-12-27 15:07:12,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074230302] [2019-12-27 15:07:12,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [388424012] [2019-12-27 15:07:12,669 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,669 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,671 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:07:12,671 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,673 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 15:07:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,689 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 15:07:12,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,691 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:07:12,692 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:07:12,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:07:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 15:07:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:07:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 15:07:12,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 15:07:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,700 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 15:07:12,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 15:07:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,701 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,701 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 15:07:12,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837349106] [2019-12-27 15:07:12,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837349106] [2019-12-27 15:07:12,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [479170397] [2019-12-27 15:07:12,800 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,801 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,803 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:07:12,803 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,806 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:12,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,808 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 15:07:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,841 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-27 15:07:12,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,842 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:07:12,843 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:07:12,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:07:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:07:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-27 15:07:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:07:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 15:07:12,849 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 15:07:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,850 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 15:07:12,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 15:07:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,851 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,851 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 15:07:12,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024064926] [2019-12-27 15:07:12,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,904 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 15:07:12,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024064926] [2019-12-27 15:07:12,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052789904] [2019-12-27 15:07:12,904 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 15:07:12,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,023 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 15:07:13,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088164429] [2019-12-27 15:07:13,024 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,025 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,027 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 15:07:13,028 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,031 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:13,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:13,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,032 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 6 states. [2019-12-27 15:07:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,091 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 15:07:13,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:13,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,093 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:07:13,093 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:07:13,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:07:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 15:07:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 15:07:13,100 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 15:07:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,101 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 15:07:13,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 15:07:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,102 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,102 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,305 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 15:07:13,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038802982] [2019-12-27 15:07:13,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038802982] [2019-12-27 15:07:13,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487168707] [2019-12-27 15:07:13,381 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 15:07:13,440 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:13,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:13,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787073557] [2019-12-27 15:07:13,533 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,534 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,535 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 15:07:13,535 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,535 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:13,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,537 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 15:07:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,561 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 15:07:13,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:13,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,563 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:07:13,563 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:07:13,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:07:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 15:07:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,569 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,569 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,570 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,571 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,780 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 15:07:13,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513773655] [2019-12-27 15:07:13,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513773655] [2019-12-27 15:07:13,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013326006] [2019-12-27 15:07:13,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:13,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [946256761] [2019-12-27 15:07:13,973 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,974 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,980 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 15:07:13,981 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,981 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:13,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,982 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,004 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-27 15:07:14,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,006 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:07:14,006 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:07:14,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:07:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-27 15:07:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:14,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,018 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:14,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,019 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,227 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 15:07:14,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527439422] [2019-12-27 15:07:14,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527439422] [2019-12-27 15:07:14,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680333469] [2019-12-27 15:07:14,320 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 15:07:14,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:14,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,374 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1650149548] [2019-12-27 15:07:14,454 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,455 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,457 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,459 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,495 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:14,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,497 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:14,497 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:14,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-27 15:07:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:14,502 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,502 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:14,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,504 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,708 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,708 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 15:07:14,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196058381] [2019-12-27 15:07:14,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196058381] [2019-12-27 15:07:14,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448603444] [2019-12-27 15:07:14,766 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 15:07:14,826 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:14,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [965809452] [2019-12-27 15:07:14,890 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,892 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,893 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,893 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,894 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,895 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,932 INFO L93 Difference]: Finished difference Result 84 states and 180 transitions. [2019-12-27 15:07:14,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,938 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:07:14,938 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:07:14,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:07:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-12-27 15:07:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:14,943 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,943 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:14,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,944 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,153 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-27 15:07:15,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136011842] [2019-12-27 15:07:15,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136011842] [2019-12-27 15:07:15,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685969294] [2019-12-27 15:07:15,220 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 15:07:15,275 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:15,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:15,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087303015] [2019-12-27 15:07:15,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 15:07:15,323 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,326 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:15,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,327 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,365 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:15,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,366 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,367 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-27 15:07:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:15,372 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,372 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:15,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,373 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,579 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-27 15:07:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341521191] [2019-12-27 15:07:15,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341521191] [2019-12-27 15:07:15,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774934813] [2019-12-27 15:07:15,630 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [875408625] [2019-12-27 15:07:15,768 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,771 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,774 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:15,774 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,779 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:15,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,781 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,868 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,870 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,870 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-27 15:07:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:15,885 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,888 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:15,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,892 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,098 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-27 15:07:16,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427123526] [2019-12-27 15:07:16,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427123526] [2019-12-27 15:07:16,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534028295] [2019-12-27 15:07:16,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:16,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:16,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2027329855] [2019-12-27 15:07:16,393 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,395 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:16,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,421 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:16,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:16,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:16,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:16,423 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,518 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-27 15:07:16,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:16,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,521 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:16,521 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:16,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-27 15:07:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:07:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 15:07:16,530 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 15:07:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,530 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 15:07:16,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 15:07:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:16,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,532 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,737 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 15:07:16,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220693287] [2019-12-27 15:07:16,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220693287] [2019-12-27 15:07:16,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433404387] [2019-12-27 15:07:16,808 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,863 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:16,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:16,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [860015650] [2019-12-27 15:07:16,932 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,934 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 15:07:16,934 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,938 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 15:07:16,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:16,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:16,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,940 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 7 states. [2019-12-27 15:07:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,023 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 15:07:17,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,024 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:07:17,024 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:07:17,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:07:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 15:07:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 15:07:17,028 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 15:07:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,029 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 15:07:17,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 15:07:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,029 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,030 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,237 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 15:07:17,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096005036] [2019-12-27 15:07:17,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,337 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 15:07:17,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096005036] [2019-12-27 15:07:17,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128111852] [2019-12-27 15:07:17,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:17,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,538 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 15:07:17,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:17,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335466161] [2019-12-27 15:07:17,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,543 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,545 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:17,545 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,545 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:17,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,546 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 15:07:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,576 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 15:07:17,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:17,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,577 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:07:17,578 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:07:17,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:07:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 15:07:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,583 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,583 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,584 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,785 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-27 15:07:17,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652471616] [2019-12-27 15:07:17,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,843 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 15:07:17,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652471616] [2019-12-27 15:07:17,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038097785] [2019-12-27 15:07:17,844 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 15:07:17,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:17,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,966 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 15:07:17,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:17,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1443897248] [2019-12-27 15:07:17,967 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,968 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,970 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:17,970 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,970 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:17,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,971 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,992 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-27 15:07:17,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,994 INFO L225 Difference]: With dead ends: 98 [2019-12-27 15:07:17,994 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 15:07:17,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 15:07:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-27 15:07:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,998 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,998 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,999 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,203 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-27 15:07:18,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629324849] [2019-12-27 15:07:18,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629324849] [2019-12-27 15:07:18,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31544810] [2019-12-27 15:07:18,260 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 15:07:18,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:18,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [209555082] [2019-12-27 15:07:18,391 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,392 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,394 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,394 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,394 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,396 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,434 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,436 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,437 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,441 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,441 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,442 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,646 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-27 15:07:18,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174340284] [2019-12-27 15:07:18,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,702 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 15:07:18,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174340284] [2019-12-27 15:07:18,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467928683] [2019-12-27 15:07:18,703 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 15:07:18,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,920 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 15:07:18,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198901907] [2019-12-27 15:07:18,921 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,921 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,926 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,927 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,972 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,973 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,973 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,977 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,977 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,978 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,182 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-27 15:07:19,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608388106] [2019-12-27 15:07:19,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,244 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 15:07:19,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608388106] [2019-12-27 15:07:19,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177634090] [2019-12-27 15:07:19,245 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:19,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,358 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 15:07:19,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575095890] [2019-12-27 15:07:19,359 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,360 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,362 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,362 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,362 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,363 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,437 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-27 15:07:19,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,438 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,438 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-27 15:07:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:19,442 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,443 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:19,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,444 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,645 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-27 15:07:19,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358416014] [2019-12-27 15:07:19,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358416014] [2019-12-27 15:07:19,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896525844] [2019-12-27 15:07:19,711 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 15:07:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2131206224] [2019-12-27 15:07:19,819 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,820 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,822 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,822 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,822 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,823 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,893 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:19,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,894 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,894 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:19,898 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,898 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:19,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,899 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,100 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-27 15:07:20,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600062956] [2019-12-27 15:07:20,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600062956] [2019-12-27 15:07:20,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369058452] [2019-12-27 15:07:20,178 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:20,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [849562159] [2019-12-27 15:07:20,295 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,296 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,297 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,297 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,298 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,299 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,372 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2019-12-27 15:07:20,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,374 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:20,374 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:20,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2019-12-27 15:07:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,379 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,379 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,380 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,380 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,589 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-27 15:07:20,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697134158] [2019-12-27 15:07:20,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,672 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 15:07:20,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697134158] [2019-12-27 15:07:20,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235921691] [2019-12-27 15:07:20,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:20,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,787 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 15:07:20,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2058362833] [2019-12-27 15:07:20,789 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,790 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,791 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,791 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,792 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,792 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,852 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:20,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,854 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:20,854 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:20,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,857 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,858 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,859 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,062 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-27 15:07:21,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071468103] [2019-12-27 15:07:21,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,125 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 15:07:21,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071468103] [2019-12-27 15:07:21,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631577704] [2019-12-27 15:07:21,126 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:21,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,237 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 15:07:21,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1393245044] [2019-12-27 15:07:21,238 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,238 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,240 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:21,240 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,243 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:21,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,244 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,345 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,346 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:21,347 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:21,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:21,350 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,350 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:21,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,352 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,352 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,555 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-27 15:07:21,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168728201] [2019-12-27 15:07:21,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,623 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 15:07:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168728201] [2019-12-27 15:07:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833138871] [2019-12-27 15:07:21,624 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:21,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,734 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 15:07:21,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [8764634] [2019-12-27 15:07:21,735 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,736 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,738 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,738 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,740 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,741 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,837 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-27 15:07:21,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,840 INFO L225 Difference]: With dead ends: 109 [2019-12-27 15:07:21,840 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 15:07:21,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 15:07:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2019-12-27 15:07:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:21,844 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,844 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:21,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,845 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,049 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-27 15:07:22,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895112775] [2019-12-27 15:07:22,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895112775] [2019-12-27 15:07:22,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153515448] [2019-12-27 15:07:22,101 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,143 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:22,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [797523987] [2019-12-27 15:07:22,219 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,220 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,222 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:22,222 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,224 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:22,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,225 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,314 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:22,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,314 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,315 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:22,316 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:22,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-12-27 15:07:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 15:07:22,319 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 15:07:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,320 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 15:07:22,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 15:07:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,321 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,525 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-27 15:07:22,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566015749] [2019-12-27 15:07:22,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,605 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 15:07:22,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566015749] [2019-12-27 15:07:22,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321654355] [2019-12-27 15:07:22,605 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,718 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 15:07:22,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [398033465] [2019-12-27 15:07:22,720 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,721 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,723 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,723 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,724 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,725 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 7 states. [2019-12-27 15:07:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,808 INFO L93 Difference]: Finished difference Result 108 states and 227 transitions. [2019-12-27 15:07:22,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,810 INFO L225 Difference]: With dead ends: 108 [2019-12-27 15:07:22,810 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 15:07:22,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 15:07:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-27 15:07:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:22,815 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,815 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:22,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,816 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,020 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-27 15:07:23,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75267294] [2019-12-27 15:07:23,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75267294] [2019-12-27 15:07:23,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306371705] [2019-12-27 15:07:23,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:23,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [67872348] [2019-12-27 15:07:23,190 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,191 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,194 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,195 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,196 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,197 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,300 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-27 15:07:23,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,301 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:23,301 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:23,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:23,305 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,306 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:23,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,306 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,307 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,511 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-27 15:07:23,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013067573] [2019-12-27 15:07:23,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013067573] [2019-12-27 15:07:23,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96995578] [2019-12-27 15:07:23,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:23,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1727494561] [2019-12-27 15:07:23,688 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,689 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,690 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,691 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,692 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,693 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,784 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-27 15:07:23,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,784 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,785 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:23,785 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:23,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:23,789 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,789 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:23,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,790 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,993 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385739, now seen corresponding path program 22 times [2019-12-27 15:07:23,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142193840] [2019-12-27 15:07:23,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,052 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 15:07:24,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142193840] [2019-12-27 15:07:24,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543143853] [2019-12-27 15:07:24,052 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 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 15:07:24,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:24,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,158 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 15:07:24,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:24,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1293525851] [2019-12-27 15:07:24,159 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,160 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,161 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:24,161 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,162 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:24,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:24,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:24,163 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,251 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2019-12-27 15:07:24,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:24,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,253 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:24,253 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:24,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2019-12-27 15:07:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:07:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 15:07:24,257 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 15:07:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,257 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 15:07:24,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 15:07:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:24,258 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,258 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,462 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 15:07:24,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991730862] [2019-12-27 15:07:24,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,532 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 15:07:24,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991730862] [2019-12-27 15:07:24,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623934701] [2019-12-27 15:07:24,532 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 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 15:07:24,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:24,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,690 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 15:07:24,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:24,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [35238944] [2019-12-27 15:07:24,691 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,692 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,694 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:24,694 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,698 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 15:07:24,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:24,700 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 8 states. [2019-12-27 15:07:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,831 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 15:07:24,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,833 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:07:24,833 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 15:07:24,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 15:07:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 15:07:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:07:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 15:07:24,839 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 15:07:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,839 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 15:07:24,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 15:07:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,841 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,041 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 15:07:25,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37000646] [2019-12-27 15:07:25,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,123 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 15:07:25,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37000646] [2019-12-27 15:07:25,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165933943] [2019-12-27 15:07:25,124 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 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 15:07:25,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:25,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,272 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 15:07:25,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:25,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1733755244] [2019-12-27 15:07:25,273 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,274 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,275 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:25,275 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,275 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:25,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:25,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:25,275 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 9 states. [2019-12-27 15:07:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,300 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-27 15:07:25,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:25,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,302 INFO L225 Difference]: With dead ends: 110 [2019-12-27 15:07:25,302 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 15:07:25,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 15:07:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-27 15:07:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:25,306 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,307 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:25,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,308 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,511 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 23 times [2019-12-27 15:07:25,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651077076] [2019-12-27 15:07:25,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651077076] [2019-12-27 15:07:25,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922611439] [2019-12-27 15:07:25,577 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 15:07:25,627 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:25,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466409036] [2019-12-27 15:07:25,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,745 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 15:07:25,747 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,748 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,749 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,775 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-27 15:07:25,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,777 INFO L225 Difference]: With dead ends: 116 [2019-12-27 15:07:25,777 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 15:07:25,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 15:07:25,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-27 15:07:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:25,781 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,782 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:25,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,783 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,987 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 24 times [2019-12-27 15:07:25,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971035390] [2019-12-27 15:07:25,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971035390] [2019-12-27 15:07:26,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340129379] [2019-12-27 15:07:26,050 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 15:07:26,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:26,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:26,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:26,169 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 15:07:26,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:26,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:26,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1979865701] [2019-12-27 15:07:26,171 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:26,172 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:26,174 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:26,174 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:26,175 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:26,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:26,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:26,176 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:26,222 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-27 15:07:26,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:26,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:26,224 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:26,224 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:26,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-27 15:07:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:26,228 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:26,228 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:26,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:26,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:26,229 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,431 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 25 times [2019-12-27 15:07:26,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322931499] [2019-12-27 15:07:26,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322931499] [2019-12-27 15:07:26,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138860185] [2019-12-27 15:07:26,488 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 15:07:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:27,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [383912285] [2019-12-27 15:07:27,055 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,056 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,058 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:27,058 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,058 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:27,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:27,059 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,119 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-27 15:07:27,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:27,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,121 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:27,121 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:27,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=129, Unknown=1, NotChecked=0, Total=210 [2019-12-27 15:07:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:27,125 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,125 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:27,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:27,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,126 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,330 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 26 times [2019-12-27 15:07:27,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625774045] [2019-12-27 15:07:27,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625774045] [2019-12-27 15:07:27,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980309004] [2019-12-27 15:07:27,392 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 15:07:27,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:27,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:27,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790976307] [2019-12-27 15:07:27,508 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,509 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,511 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:27,511 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,511 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:27,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:27,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:27,512 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,577 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-27 15:07:27,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:27,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,578 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:27,578 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:27,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:27,581 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,581 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:27,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:27,582 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,582 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,786 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 27 times [2019-12-27 15:07:27,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411212513] [2019-12-27 15:07:27,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411212513] [2019-12-27 15:07:27,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473155966] [2019-12-27 15:07:27,855 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 15:07:27,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:27,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:27,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [640304579] [2019-12-27 15:07:27,997 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,998 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,000 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:28,000 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,001 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:28,002 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,076 INFO L93 Difference]: Finished difference Result 121 states and 263 transitions. [2019-12-27 15:07:28,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,078 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:28,078 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:28,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-27 15:07:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 15:07:28,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 15:07:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,083 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 15:07:28,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 15:07:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,083 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,286 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 28 times [2019-12-27 15:07:28,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744240829] [2019-12-27 15:07:28,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744240829] [2019-12-27 15:07:28,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134762739] [2019-12-27 15:07:28,343 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 15:07:28,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:28,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:28,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [421579097] [2019-12-27 15:07:28,496 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,497 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,498 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:28,498 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,498 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:28,499 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 8 states. [2019-12-27 15:07:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,583 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:28,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,585 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:28,585 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:28,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2019-12-27 15:07:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 15:07:28,589 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 15:07:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,589 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 15:07:28,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 15:07:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,590 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,795 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 29 times [2019-12-27 15:07:28,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116834502] [2019-12-27 15:07:28,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116834502] [2019-12-27 15:07:28,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697227047] [2019-12-27 15:07:28,858 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,902 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:28,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1843701182] [2019-12-27 15:07:29,399 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,400 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,401 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:29,403 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 8 states. [2019-12-27 15:07:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,480 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:29,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,481 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:29,481 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:29,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=147, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:29,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,486 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:29,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,487 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,690 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 30 times [2019-12-27 15:07:29,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770274656] [2019-12-27 15:07:29,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770274656] [2019-12-27 15:07:29,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818386463] [2019-12-27 15:07:29,777 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:29,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [74649804] [2019-12-27 15:07:29,893 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,894 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,895 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:29,895 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,896 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,896 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,979 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-27 15:07:29,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,980 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:29,980 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:29,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-27 15:07:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:29,984 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,985 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:29,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,986 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,986 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,190 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 31 times [2019-12-27 15:07:30,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715704239] [2019-12-27 15:07:30,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715704239] [2019-12-27 15:07:30,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399020271] [2019-12-27 15:07:30,253 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [610245072] [2019-12-27 15:07:30,366 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,367 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,368 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:30,368 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,369 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,463 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2019-12-27 15:07:30,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,465 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:30,465 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:30,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2019-12-27 15:07:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:30,469 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,469 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:30,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,470 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,674 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 32 times [2019-12-27 15:07:30,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66253045] [2019-12-27 15:07:30,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66253045] [2019-12-27 15:07:30,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787648027] [2019-12-27 15:07:30,734 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:30,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [186235404] [2019-12-27 15:07:30,873 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,874 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,877 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:30,877 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,878 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,880 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,019 INFO L93 Difference]: Finished difference Result 125 states and 270 transitions. [2019-12-27 15:07:31,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,021 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:31,021 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:31,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 15:07:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:31,025 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,025 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:31,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,026 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,229 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 33 times [2019-12-27 15:07:31,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318896020] [2019-12-27 15:07:31,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318896020] [2019-12-27 15:07:31,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084952901] [2019-12-27 15:07:31,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:31,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [422939038] [2019-12-27 15:07:31,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,549 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,550 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,639 INFO L93 Difference]: Finished difference Result 124 states and 269 transitions. [2019-12-27 15:07:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,640 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:31,640 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:31,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2019-12-27 15:07:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:31,644 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,644 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:31,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,645 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,848 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 34 times [2019-12-27 15:07:31,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86826553] [2019-12-27 15:07:31,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86826553] [2019-12-27 15:07:31,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911167387] [2019-12-27 15:07:31,915 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:31,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [279532077] [2019-12-27 15:07:32,043 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,044 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,046 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,047 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,137 INFO L93 Difference]: Finished difference Result 126 states and 271 transitions. [2019-12-27 15:07:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,138 INFO L225 Difference]: With dead ends: 126 [2019-12-27 15:07:32,138 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 15:07:32,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 15:07:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2019-12-27 15:07:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:32,143 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,144 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:32,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,144 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,345 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 35 times [2019-12-27 15:07:32,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942167984] [2019-12-27 15:07:32,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942167984] [2019-12-27 15:07:32,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501888555] [2019-12-27 15:07:32,405 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:32,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1899084509] [2019-12-27 15:07:32,515 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,516 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,517 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,518 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,641 INFO L93 Difference]: Finished difference Result 124 states and 269 transitions. [2019-12-27 15:07:32,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,641 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,642 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:32,642 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:32,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2019-12-27 15:07:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:32,646 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,646 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:32,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,647 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,647 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,848 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 36 times [2019-12-27 15:07:32,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187937882] [2019-12-27 15:07:32,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187937882] [2019-12-27 15:07:32,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266829927] [2019-12-27 15:07:32,907 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,959 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:32,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [100133215] [2019-12-27 15:07:33,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,033 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,034 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,035 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,035 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,035 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,129 INFO L93 Difference]: Finished difference Result 125 states and 270 transitions. [2019-12-27 15:07:33,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,131 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:33,131 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:33,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 15:07:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:33,135 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,135 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:33,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,136 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,337 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280155, now seen corresponding path program 37 times [2019-12-27 15:07:33,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277912986] [2019-12-27 15:07:33,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277912986] [2019-12-27 15:07:33,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601817210] [2019-12-27 15:07:33,416 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [366413380] [2019-12-27 15:07:33,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,550 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,550 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,550 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,551 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,640 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:33,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,642 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:33,642 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:33,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2019-12-27 15:07:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:33,646 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,647 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:33,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,647 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,647 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,851 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 38 times [2019-12-27 15:07:33,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006777627] [2019-12-27 15:07:33,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006777627] [2019-12-27 15:07:33,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069099064] [2019-12-27 15:07:33,911 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:33,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1693673649] [2019-12-27 15:07:34,048 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,049 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,052 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 15:07:34,052 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,058 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:34,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,059 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,230 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2019-12-27 15:07:34,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,232 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:34,232 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:34,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2019-12-27 15:07:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:34,235 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,236 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:34,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,236 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,236 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,437 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 39 times [2019-12-27 15:07:34,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236645202] [2019-12-27 15:07:34,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236645202] [2019-12-27 15:07:34,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678664152] [2019-12-27 15:07:34,515 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:34,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1003741953] [2019-12-27 15:07:35,243 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,244 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,246 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:35,246 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,250 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:35,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=127, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:35,251 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,413 INFO L93 Difference]: Finished difference Result 129 states and 268 transitions. [2019-12-27 15:07:35,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,415 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:35,415 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:35,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=205, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:35,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,419 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:35,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,420 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,621 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 40 times [2019-12-27 15:07:35,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604125353] [2019-12-27 15:07:35,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604125353] [2019-12-27 15:07:35,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971479494] [2019-12-27 15:07:35,683 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:35,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1631236586] [2019-12-27 15:07:35,792 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:35,794 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,796 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:35,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,797 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,928 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2019-12-27 15:07:35,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,929 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:35,929 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:35,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2019-12-27 15:07:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-27 15:07:35,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-27 15:07:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,932 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-27 15:07:35,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-27 15:07:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,933 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,133 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 41 times [2019-12-27 15:07:36,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277686943] [2019-12-27 15:07:36,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277686943] [2019-12-27 15:07:36,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819484693] [2019-12-27 15:07:36,231 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,273 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:36,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110089083] [2019-12-27 15:07:36,356 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,358 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,359 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,359 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,360 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:36,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,361 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 8 states. [2019-12-27 15:07:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,510 INFO L93 Difference]: Finished difference Result 133 states and 278 transitions. [2019-12-27 15:07:36,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:36,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,511 INFO L225 Difference]: With dead ends: 133 [2019-12-27 15:07:36,512 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 15:07:36,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 15:07:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2019-12-27 15:07:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:36,515 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,515 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:36,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,516 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,516 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,717 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 42 times [2019-12-27 15:07:36,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887602434] [2019-12-27 15:07:36,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887602434] [2019-12-27 15:07:36,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930822417] [2019-12-27 15:07:36,782 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,825 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:36,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1265567307] [2019-12-27 15:07:36,967 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,968 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,970 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,970 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,972 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:36,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,973 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,161 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 15:07:37,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:37,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,163 INFO L225 Difference]: With dead ends: 131 [2019-12-27 15:07:37,163 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 15:07:37,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 15:07:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-27 15:07:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:37,167 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,167 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:37,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,168 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,168 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,383 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 43 times [2019-12-27 15:07:37,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671921921] [2019-12-27 15:07:37,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671921921] [2019-12-27 15:07:37,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081420895] [2019-12-27 15:07:37,448 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:37,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:37,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2105103243] [2019-12-27 15:07:37,616 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:37,618 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:37,621 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:37,621 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:37,624 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:37,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:37,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:37,625 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,821 INFO L93 Difference]: Finished difference Result 130 states and 272 transitions. [2019-12-27 15:07:37,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,822 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:37,822 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:37,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2019-12-27 15:07:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:37,825 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,826 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:37,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,826 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,826 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,030 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666856, now seen corresponding path program 44 times [2019-12-27 15:07:38,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991676614] [2019-12-27 15:07:38,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991676614] [2019-12-27 15:07:38,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94754603] [2019-12-27 15:07:38,092 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:38,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347895734] [2019-12-27 15:07:38,221 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,222 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,224 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,224 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,225 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:38,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,226 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,329 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2019-12-27 15:07:38,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,331 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:38,331 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:38,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2019-12-27 15:07:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 15:07:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 209 transitions. [2019-12-27 15:07:38,335 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 209 transitions. Word has length 12 [2019-12-27 15:07:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,335 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 209 transitions. [2019-12-27 15:07:38,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 209 transitions. [2019-12-27 15:07:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,336 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,539 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 45 times [2019-12-27 15:07:38,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86327597] [2019-12-27 15:07:38,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86327597] [2019-12-27 15:07:38,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365910149] [2019-12-27 15:07:38,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:38,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1276270145] [2019-12-27 15:07:38,711 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,712 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,714 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:38,714 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,715 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:38,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,716 INFO L87 Difference]: Start difference. First operand 95 states and 209 transitions. Second operand 8 states. [2019-12-27 15:07:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,820 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-27 15:07:38,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,821 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:38,821 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:38,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:38,825 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,825 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:38,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,826 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,826 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,029 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 46 times [2019-12-27 15:07:39,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859253781] [2019-12-27 15:07:39,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859253781] [2019-12-27 15:07:39,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799685181] [2019-12-27 15:07:39,092 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,136 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:39,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1506177789] [2019-12-27 15:07:39,216 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,217 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,218 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,218 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,219 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:39,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,220 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,346 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:39,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,348 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:39,348 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:39,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2019-12-27 15:07:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:39,352 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,353 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:39,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,353 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,354 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,557 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 47 times [2019-12-27 15:07:39,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501813092] [2019-12-27 15:07:39,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501813092] [2019-12-27 15:07:39,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436593822] [2019-12-27 15:07:39,617 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,661 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:39,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562422667] [2019-12-27 15:07:39,757 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,758 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,759 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,759 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,760 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:39,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,760 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,885 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-27 15:07:39,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,887 INFO L225 Difference]: With dead ends: 128 [2019-12-27 15:07:39,887 INFO L226 Difference]: Without dead ends: 127 [2019-12-27 15:07:39,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-27 15:07:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2019-12-27 15:07:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:39,890 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,890 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:39,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,891 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,094 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 48 times [2019-12-27 15:07:40,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432613616] [2019-12-27 15:07:40,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432613616] [2019-12-27 15:07:40,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959062333] [2019-12-27 15:07:40,172 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,226 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:40,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351511233] [2019-12-27 15:07:40,315 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,316 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,318 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,318 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,319 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:40,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,320 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,432 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:40,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,433 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:40,433 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:40,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2019-12-27 15:07:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-27 15:07:40,437 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-27 15:07:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,437 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-27 15:07:40,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-27 15:07:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,438 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,641 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279501, now seen corresponding path program 49 times [2019-12-27 15:07:40,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306630218] [2019-12-27 15:07:40,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306630218] [2019-12-27 15:07:40,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556340699] [2019-12-27 15:07:40,704 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1531025165] [2019-12-27 15:07:40,830 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,831 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,833 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,833 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:40,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,835 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 8 states. [2019-12-27 15:07:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,949 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-27 15:07:40,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,949 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,950 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:40,951 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:40,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:40,953 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,954 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:40,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,954 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,155 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 50 times [2019-12-27 15:07:41,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562594242] [2019-12-27 15:07:41,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562594242] [2019-12-27 15:07:41,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220592438] [2019-12-27 15:07:41,213 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:41,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [629916240] [2019-12-27 15:07:42,005 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,007 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,008 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,008 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=124, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:42,010 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,161 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:42,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,163 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:42,163 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:42,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2019-12-27 15:07:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:42,167 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,167 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:42,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,168 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,168 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,371 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284306, now seen corresponding path program 51 times [2019-12-27 15:07:42,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235428931] [2019-12-27 15:07:42,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235428931] [2019-12-27 15:07:42,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795744124] [2019-12-27 15:07:42,441 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:42,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2074939183] [2019-12-27 15:07:42,573 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,574 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,576 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,576 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,576 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,577 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,720 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2019-12-27 15:07:42,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,721 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:42,721 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:42,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2019-12-27 15:07:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:42,724 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,724 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:42,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,725 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,725 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,926 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 52 times [2019-12-27 15:07:42,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468288320] [2019-12-27 15:07:42,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468288320] [2019-12-27 15:07:42,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039203492] [2019-12-27 15:07:42,994 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:43,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436652560] [2019-12-27 15:07:43,114 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,114 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,115 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,116 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,116 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:43,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,117 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,220 INFO L93 Difference]: Finished difference Result 117 states and 244 transitions. [2019-12-27 15:07:43,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:43,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,222 INFO L225 Difference]: With dead ends: 117 [2019-12-27 15:07:43,222 INFO L226 Difference]: Without dead ends: 116 [2019-12-27 15:07:43,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-27 15:07:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2019-12-27 15:07:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-27 15:07:43,226 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-27 15:07:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,226 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-27 15:07:43,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-27 15:07:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:43,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,227 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,431 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 15:07:43,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990891996] [2019-12-27 15:07:43,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,494 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 15:07:43,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990891996] [2019-12-27 15:07:43,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815507281] [2019-12-27 15:07:43,494 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,540 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:43,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,633 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 15:07:43,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:43,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034474994] [2019-12-27 15:07:43,634 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,635 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,637 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 15:07:43,637 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,640 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:43,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:43,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:43,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:43,641 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 9 states. [2019-12-27 15:07:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,769 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-27 15:07:43,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:43,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,771 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:43,771 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:43,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:07:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-27 15:07:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 15:07:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 15:07:43,775 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 15:07:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,776 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 15:07:43,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 15:07:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:43,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,776 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,979 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-27 15:07:43,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433845375] [2019-12-27 15:07:43,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,080 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 15:07:44,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433845375] [2019-12-27 15:07:44,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761105242] [2019-12-27 15:07:44,081 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:44,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 15:07:44,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1507180171] [2019-12-27 15:07:44,189 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,192 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 15:07:44,192 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,192 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:44,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:44,193 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-27 15:07:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,217 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-27 15:07:44,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,225 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:44,225 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:44,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-27 15:07:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:07:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 15:07:44,230 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-27 15:07:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,230 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 15:07:44,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 15:07:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,231 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,435 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 53 times [2019-12-27 15:07:44,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002235497] [2019-12-27 15:07:44,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,508 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 15:07:44,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002235497] [2019-12-27 15:07:44,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067046802] [2019-12-27 15:07:44,509 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:44,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,662 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 15:07:44,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:44,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [872584050] [2019-12-27 15:07:44,664 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,665 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,667 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 15:07:44,667 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,668 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 9 states. [2019-12-27 15:07:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,704 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-27 15:07:44,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,705 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:44,705 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:44,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-27 15:07:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:07:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-27 15:07:44,710 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-27 15:07:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,710 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-27 15:07:44,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-27 15:07:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,711 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,913 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 54 times [2019-12-27 15:07:44,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507994744] [2019-12-27 15:07:44,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507994744] [2019-12-27 15:07:44,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468882861] [2019-12-27 15:07:44,978 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,027 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:45,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:45,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,128 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 15:07:45,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99288372] [2019-12-27 15:07:45,129 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,130 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,132 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:45,132 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,132 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:45,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,133 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 9 states. [2019-12-27 15:07:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,184 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-27 15:07:45,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,185 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:07:45,185 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:07:45,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:07:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-27 15:07:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:07:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-27 15:07:45,188 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-27 15:07:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,188 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-27 15:07:45,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-27 15:07:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,189 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,390 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 55 times [2019-12-27 15:07:45,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240499773] [2019-12-27 15:07:45,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,455 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 15:07:45,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240499773] [2019-12-27 15:07:45,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038276589] [2019-12-27 15:07:45,456 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,127 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 15:07:46,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:46,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769035112] [2019-12-27 15:07:46,128 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,128 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,130 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:46,130 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,130 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:46,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:46,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:46,131 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 9 states. [2019-12-27 15:07:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:46,184 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-27 15:07:46,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:46,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:46,186 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:07:46,186 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:07:46,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:07:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2019-12-27 15:07:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 15:07:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-27 15:07:46,190 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-27 15:07:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:46,190 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-27 15:07:46,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-27 15:07:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:46,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:46,191 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:46,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,392 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 56 times [2019-12-27 15:07:46,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:46,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920045677] [2019-12-27 15:07:46,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920045677] [2019-12-27 15:07:46,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113923996] [2019-12-27 15:07:46,470 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:46,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:46,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:46,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [352593695] [2019-12-27 15:07:46,617 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,618 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,620 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:46,620 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,620 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:46,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:46,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:46,621 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 9 states. [2019-12-27 15:07:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:46,696 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 15:07:46,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:46,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:46,697 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:07:46,697 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:07:46,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:07:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-27 15:07:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 15:07:46,700 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 15:07:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:46,700 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 15:07:46,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 15:07:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:46,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:46,701 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:46,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,905 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 57 times [2019-12-27 15:07:46,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:46,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704657671] [2019-12-27 15:07:46,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:46,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704657671] [2019-12-27 15:07:46,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469793183] [2019-12-27 15:07:46,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:47,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:47,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:47,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,023 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 15:07:49,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:49,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057526355] [2019-12-27 15:07:49,024 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,025 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,027 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:49,027 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,027 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:49,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=157, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:49,028 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 9 states. [2019-12-27 15:07:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:49,107 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:07:49,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:49,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:49,110 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:07:49,110 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:07:49,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=194, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:07:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2019-12-27 15:07:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:07:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-27 15:07:49,114 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-27 15:07:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:49,114 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-27 15:07:49,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-27 15:07:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:49,115 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:49,115 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:49,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,319 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 58 times [2019-12-27 15:07:49,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:49,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323393690] [2019-12-27 15:07:49,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:49,383 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 15:07:49,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323393690] [2019-12-27 15:07:49,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122449934] [2019-12-27 15:07:49,384 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:49,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:50,210 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 15:07:50,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:50,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:50,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978352] [2019-12-27 15:07:50,211 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:50,212 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:50,213 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:50,214 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:50,214 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:50,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:50,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=156, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:50,214 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 9 states. [2019-12-27 15:07:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,301 INFO L93 Difference]: Finished difference Result 182 states and 419 transitions. [2019-12-27 15:07:50,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:50,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,303 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:07:50,303 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:07:50,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=193, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:07:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2019-12-27 15:07:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 15:07:50,307 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 15:07:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,307 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 15:07:50,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 15:07:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:50,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,308 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,509 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 59 times [2019-12-27 15:07:50,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019426575] [2019-12-27 15:07:50,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,576 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 15:07:50,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019426575] [2019-12-27 15:07:50,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122193334] [2019-12-27 15:07:50,577 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:50,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:50,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,144 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 15:07:51,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:51,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662189341] [2019-12-27 15:07:51,145 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,146 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,147 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:51,147 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,147 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:51,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:51,148 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 9 states. [2019-12-27 15:07:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,795 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-27 15:07:51,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,797 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:51,798 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:51,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=188, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2019-12-27 15:07:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-27 15:07:51,802 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-27 15:07:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,802 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-27 15:07:51,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-27 15:07:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:51,803 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,803 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,006 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 60 times [2019-12-27 15:07:52,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871021623] [2019-12-27 15:07:52,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,067 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 15:07:52,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871021623] [2019-12-27 15:07:52,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124469337] [2019-12-27 15:07:52,067 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,113 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:52,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,193 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 15:07:52,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393878422] [2019-12-27 15:07:52,194 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,195 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,197 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:52,197 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,197 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,198 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 9 states. [2019-12-27 15:07:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,286 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-27 15:07:52,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:52,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,288 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:52,288 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:52,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-27 15:07:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:52,293 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,293 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:52,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,294 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,494 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 61 times [2019-12-27 15:07:52,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823594107] [2019-12-27 15:07:52,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823594107] [2019-12-27 15:07:52,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219322710] [2019-12-27 15:07:52,565 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1680750821] [2019-12-27 15:07:52,713 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,714 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,715 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:52,715 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,716 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,716 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,831 INFO L93 Difference]: Finished difference Result 191 states and 446 transitions. [2019-12-27 15:07:52,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:52,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,833 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:07:52,834 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:07:52,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:07:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2019-12-27 15:07:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-27 15:07:52,837 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-27 15:07:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,837 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-27 15:07:52,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-27 15:07:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,838 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,041 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 62 times [2019-12-27 15:07:53,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134902108] [2019-12-27 15:07:53,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134902108] [2019-12-27 15:07:53,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536160283] [2019-12-27 15:07:53,112 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:53,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1627207647] [2019-12-27 15:07:53,272 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,272 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,274 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,274 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,274 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,275 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 9 states. [2019-12-27 15:07:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,420 INFO L93 Difference]: Finished difference Result 193 states and 448 transitions. [2019-12-27 15:07:53,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,422 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:07:53,422 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:07:53,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:07:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2019-12-27 15:07:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:53,427 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,427 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:53,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,428 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,632 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 63 times [2019-12-27 15:07:53,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746323337] [2019-12-27 15:07:53,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,699 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 15:07:53,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746323337] [2019-12-27 15:07:53,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113298870] [2019-12-27 15:07:53,700 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:53,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,819 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 15:07:53,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1750221408] [2019-12-27 15:07:53,820 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,822 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,824 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,824 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,824 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,825 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,917 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2019-12-27 15:07:53,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,919 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:07:53,919 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:07:53,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:07:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2019-12-27 15:07:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:07:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 352 transitions. [2019-12-27 15:07:53,924 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 352 transitions. Word has length 13 [2019-12-27 15:07:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,924 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 352 transitions. [2019-12-27 15:07:53,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 352 transitions. [2019-12-27 15:07:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,925 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,925 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,126 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 64 times [2019-12-27 15:07:54,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926629423] [2019-12-27 15:07:54,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926629423] [2019-12-27 15:07:54,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049223722] [2019-12-27 15:07:54,195 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:54,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1538243139] [2019-12-27 15:07:54,356 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,357 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,359 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,359 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,359 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,359 INFO L87 Difference]: Start difference. First operand 146 states and 352 transitions. Second operand 9 states. [2019-12-27 15:07:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,472 INFO L93 Difference]: Finished difference Result 189 states and 438 transitions. [2019-12-27 15:07:54,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,474 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:07:54,474 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:07:54,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:07:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 148. [2019-12-27 15:07:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:54,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,478 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:54,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,479 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,683 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 65 times [2019-12-27 15:07:54,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328674898] [2019-12-27 15:07:54,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,752 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 15:07:54,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328674898] [2019-12-27 15:07:54,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644672873] [2019-12-27 15:07:54,752 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,798 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:54,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,945 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 15:07:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [493276019] [2019-12-27 15:07:54,946 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,948 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,950 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,951 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,079 INFO L93 Difference]: Finished difference Result 188 states and 437 transitions. [2019-12-27 15:07:55,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,081 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:07:55,081 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:07:55,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:07:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 147. [2019-12-27 15:07:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-27 15:07:55,084 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-27 15:07:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,085 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-27 15:07:55,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-27 15:07:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,085 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,085 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,286 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 66 times [2019-12-27 15:07:55,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456277560] [2019-12-27 15:07:55,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,359 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 15:07:55,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456277560] [2019-12-27 15:07:55,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333875869] [2019-12-27 15:07:55,360 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,402 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:55,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:55,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,581 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 15:07:55,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356801362] [2019-12-27 15:07:55,581 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,582 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,584 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:55,584 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,584 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,585 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 9 states. [2019-12-27 15:07:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,708 INFO L93 Difference]: Finished difference Result 187 states and 433 transitions. [2019-12-27 15:07:55,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,710 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:07:55,710 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:07:55,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:07:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2019-12-27 15:07:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:55,715 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,715 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:55,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,716 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,920 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675061, now seen corresponding path program 67 times [2019-12-27 15:07:55,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83366556] [2019-12-27 15:07:55,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,982 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 15:07:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83366556] [2019-12-27 15:07:55,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238200842] [2019-12-27 15:07:55,983 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,183 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 15:07:56,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1914355428] [2019-12-27 15:07:56,184 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,185 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,186 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:56,186 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,186 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,187 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,300 INFO L93 Difference]: Finished difference Result 177 states and 411 transitions. [2019-12-27 15:07:56,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,302 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:07:56,303 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:07:56,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:07:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2019-12-27 15:07:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 353 transitions. [2019-12-27 15:07:56,306 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 353 transitions. Word has length 13 [2019-12-27 15:07:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,306 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 353 transitions. [2019-12-27 15:07:56,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 353 transitions. [2019-12-27 15:07:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,307 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,509 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 68 times [2019-12-27 15:07:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348312968] [2019-12-27 15:07:56,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,582 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 15:07:56,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348312968] [2019-12-27 15:07:56,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518796690] [2019-12-27 15:07:56,582 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:56,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,704 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 15:07:56,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [437207305] [2019-12-27 15:07:56,705 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,706 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,707 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:56,707 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,708 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,708 INFO L87 Difference]: Start difference. First operand 147 states and 353 transitions. Second operand 9 states. [2019-12-27 15:07:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,824 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-27 15:07:56,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,825 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:07:56,825 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:07:56,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:07:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2019-12-27 15:07:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:07:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:07:56,829 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:07:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,829 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:07:56,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:07:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,830 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,034 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 69 times [2019-12-27 15:07:57,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329538785] [2019-12-27 15:07:57,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,106 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 15:07:57,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329538785] [2019-12-27 15:07:57,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835810405] [2019-12-27 15:07:57,107 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:57,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,270 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 15:07:57,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:57,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155040901] [2019-12-27 15:07:57,271 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,272 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,275 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:57,276 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,276 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:57,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:57,277 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:07:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,429 INFO L93 Difference]: Finished difference Result 188 states and 437 transitions. [2019-12-27 15:07:57,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,431 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:07:57,431 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:07:57,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:07:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2019-12-27 15:07:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:07:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:07:57,435 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:07:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,435 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:07:57,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:07:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,436 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,639 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 70 times [2019-12-27 15:07:57,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213307953] [2019-12-27 15:07:57,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,708 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 15:07:57,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213307953] [2019-12-27 15:07:57,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747841200] [2019-12-27 15:07:57,709 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:57,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:58,393 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:07:58,395 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 15:07:58,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:58,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:58,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [787548866] [2019-12-27 15:07:58,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:58,397 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:58,398 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:58,399 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:58,399 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:58,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:58,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:58,399 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:07:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:58,676 INFO L93 Difference]: Finished difference Result 193 states and 448 transitions. [2019-12-27 15:07:58,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:58,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:58,678 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:07:58,679 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:07:58,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=252, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:07:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:07:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 152. [2019-12-27 15:07:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:07:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:07:58,684 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:07:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:58,684 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:07:58,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:07:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:58,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:58,685 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:58,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,888 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 71 times [2019-12-27 15:07:58,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:58,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964953755] [2019-12-27 15:07:58,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:58,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964953755] [2019-12-27 15:07:58,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450787541] [2019-12-27 15:07:58,956 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:59,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:59,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:59,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:59,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1531206307] [2019-12-27 15:07:59,102 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,103 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,105 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:59,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,105 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:59,106 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:07:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:59,236 INFO L93 Difference]: Finished difference Result 192 states and 447 transitions. [2019-12-27 15:07:59,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:59,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:59,238 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:07:59,238 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:07:59,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:07:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-27 15:07:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:07:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 362 transitions. [2019-12-27 15:07:59,242 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 362 transitions. Word has length 13 [2019-12-27 15:07:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:59,242 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 362 transitions. [2019-12-27 15:07:59,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 362 transitions. [2019-12-27 15:07:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:59,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:59,243 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:59,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,446 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 72 times [2019-12-27 15:07:59,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:59,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835792433] [2019-12-27 15:07:59,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,513 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 15:07:59,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835792433] [2019-12-27 15:07:59,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371670038] [2019-12-27 15:07:59,514 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,559 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:59,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:59,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:59,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,652 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 15:07:59,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2103469822] [2019-12-27 15:07:59,653 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,655 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,657 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:59,657 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,657 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:59,658 INFO L87 Difference]: Start difference. First operand 150 states and 362 transitions. Second operand 9 states. [2019-12-27 15:08:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,219 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2019-12-27 15:08:00,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,221 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:00,221 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:00,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=251, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:08:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:00,226 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,226 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:00,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,227 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,428 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 73 times [2019-12-27 15:08:00,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371134743] [2019-12-27 15:08:00,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371134743] [2019-12-27 15:08:00,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576034592] [2019-12-27 15:08:00,506 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:00,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:00,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:00,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [300152245] [2019-12-27 15:08:00,665 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:00,666 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:00,667 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:00,667 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:00,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:00,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:00,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:00,668 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,817 INFO L93 Difference]: Finished difference Result 196 states and 457 transitions. [2019-12-27 15:08:00,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,819 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:00,819 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:00,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:08:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:08:00,823 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:08:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,824 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:08:00,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:08:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,825 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:01,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,028 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 74 times [2019-12-27 15:08:01,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:01,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837538532] [2019-12-27 15:08:01,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:01,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837538532] [2019-12-27 15:08:01,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109483992] [2019-12-27 15:08:01,112 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:01,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,699 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536823765] [2019-12-27 15:08:01,700 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,701 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,703 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,703 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,704 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:02,216 INFO L93 Difference]: Finished difference Result 199 states and 463 transitions. [2019-12-27 15:08:02,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:02,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:02,218 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:02,219 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:02,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=250, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 152. [2019-12-27 15:08:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:02,222 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:02,222 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:02,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:02,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:02,223 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,424 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271950, now seen corresponding path program 75 times [2019-12-27 15:08:02,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352128388] [2019-12-27 15:08:02,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,495 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 15:08:02,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352128388] [2019-12-27 15:08:02,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018064816] [2019-12-27 15:08:02,496 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:02,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,627 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 15:08:02,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1608799847] [2019-12-27 15:08:02,628 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,629 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,631 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,631 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,631 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,632 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:02,752 INFO L93 Difference]: Finished difference Result 191 states and 446 transitions. [2019-12-27 15:08:02,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:02,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:02,754 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:08:02,754 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:08:02,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:08:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2019-12-27 15:08:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 358 transitions. [2019-12-27 15:08:02,759 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 358 transitions. Word has length 13 [2019-12-27 15:08:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:02,759 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 358 transitions. [2019-12-27 15:08:02,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 358 transitions. [2019-12-27 15:08:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:02,760 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:02,760 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,963 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 76 times [2019-12-27 15:08:02,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868912333] [2019-12-27 15:08:02,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,041 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 15:08:03,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868912333] [2019-12-27 15:08:03,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329325143] [2019-12-27 15:08:03,042 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,085 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:03,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,153 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 15:08:03,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1728638009] [2019-12-27 15:08:03,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,155 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,157 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,157 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,157 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,158 INFO L87 Difference]: Start difference. First operand 149 states and 358 transitions. Second operand 9 states. [2019-12-27 15:08:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,276 INFO L93 Difference]: Finished difference Result 195 states and 450 transitions. [2019-12-27 15:08:03,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,278 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:03,278 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:03,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2019-12-27 15:08:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:03,282 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,282 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:03,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,283 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,283 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,484 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 77 times [2019-12-27 15:08:03,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459633161] [2019-12-27 15:08:03,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459633161] [2019-12-27 15:08:03,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701173458] [2019-12-27 15:08:03,565 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,638 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:03,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410042984] [2019-12-27 15:08:03,729 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,730 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,732 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,732 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,733 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,733 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,871 INFO L93 Difference]: Finished difference Result 198 states and 462 transitions. [2019-12-27 15:08:03,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,873 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:03,873 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:03,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2019-12-27 15:08:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:08:03,878 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:08:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,878 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:08:03,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:08:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,878 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,080 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 78 times [2019-12-27 15:08:04,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974163090] [2019-12-27 15:08:04,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974163090] [2019-12-27 15:08:04,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121536260] [2019-12-27 15:08:04,147 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,191 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:04,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:04,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [830522849] [2019-12-27 15:08:04,280 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,281 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,283 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,283 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,284 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,284 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,421 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2019-12-27 15:08:04,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,423 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:04,423 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:04,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2019-12-27 15:08:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:04,428 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,428 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:04,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,428 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,629 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 79 times [2019-12-27 15:08:04,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399241070] [2019-12-27 15:08:04,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,694 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 15:08:04,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399241070] [2019-12-27 15:08:04,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304336756] [2019-12-27 15:08:04,695 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,811 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 15:08:04,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822733097] [2019-12-27 15:08:04,813 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,814 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,816 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,816 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,816 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,817 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,966 INFO L93 Difference]: Finished difference Result 197 states and 461 transitions. [2019-12-27 15:08:04,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,968 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:04,968 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:04,968 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 150. [2019-12-27 15:08:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 362 transitions. [2019-12-27 15:08:04,972 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 362 transitions. Word has length 13 [2019-12-27 15:08:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,972 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 362 transitions. [2019-12-27 15:08:04,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 362 transitions. [2019-12-27 15:08:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,973 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,973 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,174 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 80 times [2019-12-27 15:08:05,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099299454] [2019-12-27 15:08:05,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099299454] [2019-12-27 15:08:05,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900092890] [2019-12-27 15:08:05,237 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:05,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1889703800] [2019-12-27 15:08:05,400 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,401 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,403 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,403 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,403 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,404 INFO L87 Difference]: Start difference. First operand 150 states and 362 transitions. Second operand 9 states. [2019-12-27 15:08:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,546 INFO L93 Difference]: Finished difference Result 200 states and 464 transitions. [2019-12-27 15:08:05,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,548 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:05,548 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:05,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2019-12-27 15:08:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:05,552 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,552 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:05,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,552 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,758 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884750, now seen corresponding path program 81 times [2019-12-27 15:08:05,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150025840] [2019-12-27 15:08:05,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,828 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 15:08:05,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150025840] [2019-12-27 15:08:05,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933564579] [2019-12-27 15:08:05,828 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:05,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,958 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 15:08:05,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1205845585] [2019-12-27 15:08:05,959 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,960 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,961 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,961 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,962 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,962 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,121 INFO L93 Difference]: Finished difference Result 200 states and 467 transitions. [2019-12-27 15:08:06,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,123 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:06,124 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:06,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 151. [2019-12-27 15:08:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:08:06,128 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:08:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,128 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:08:06,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:08:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,129 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,329 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889400, now seen corresponding path program 82 times [2019-12-27 15:08:06,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119638797] [2019-12-27 15:08:06,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,409 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 15:08:06,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119638797] [2019-12-27 15:08:06,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145144387] [2019-12-27 15:08:06,409 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,452 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:06,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,546 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 15:08:06,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [590831676] [2019-12-27 15:08:06,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,550 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,550 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,550 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,550 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,702 INFO L93 Difference]: Finished difference Result 192 states and 447 transitions. [2019-12-27 15:08:06,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,704 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:06,704 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:06,704 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2019-12-27 15:08:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:06,707 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,707 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:06,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,708 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,708 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,910 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889555, now seen corresponding path program 83 times [2019-12-27 15:08:06,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327893644] [2019-12-27 15:08:06,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,984 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 15:08:06,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327893644] [2019-12-27 15:08:06,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671545600] [2019-12-27 15:08:06,984 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:07,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,119 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 15:08:07,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [532724417] [2019-12-27 15:08:07,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,123 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:07,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,123 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:07,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,124 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,243 INFO L93 Difference]: Finished difference Result 174 states and 408 transitions. [2019-12-27 15:08:07,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,245 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:08:07,245 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:08:07,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:08:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2019-12-27 15:08:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:07,249 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,249 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:07,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,250 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,250 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,452 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 84 times [2019-12-27 15:08:07,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429401459] [2019-12-27 15:08:07,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,524 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 15:08:07,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429401459] [2019-12-27 15:08:07,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513653870] [2019-12-27 15:08:07,524 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,568 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:07,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,669 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 15:08:07,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [46167446] [2019-12-27 15:08:07,670 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,671 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,674 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 15:08:07,675 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,678 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:08:07,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,679 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,839 INFO L93 Difference]: Finished difference Result 181 states and 412 transitions. [2019-12-27 15:08:07,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,841 INFO L225 Difference]: With dead ends: 181 [2019-12-27 15:08:07,841 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 15:08:07,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 15:08:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 150. [2019-12-27 15:08:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:07,845 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,845 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:07,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,846 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,846 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,047 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 85 times [2019-12-27 15:08:08,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305464885] [2019-12-27 15:08:08,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,129 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 15:08:08,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305464885] [2019-12-27 15:08:08,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046863261] [2019-12-27 15:08:08,129 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:08,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:09,077 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 15:08:09,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:09,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:09,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [703641002] [2019-12-27 15:08:09,078 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:09,079 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:09,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:09,082 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:09,083 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:09,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:09,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=172, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:09,084 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:09,965 INFO L93 Difference]: Finished difference Result 189 states and 429 transitions. [2019-12-27 15:08:09,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:09,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:09,967 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:09,967 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:09,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=286, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2019-12-27 15:08:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:09,971 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:09,971 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:09,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:09,971 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:09,972 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:10,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,172 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 86 times [2019-12-27 15:08:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:10,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135559016] [2019-12-27 15:08:10,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:10,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135559016] [2019-12-27 15:08:10,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303046351] [2019-12-27 15:08:10,245 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:10,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:10,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:10,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:10,375 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 15:08:10,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:10,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:10,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867294802] [2019-12-27 15:08:10,376 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:10,378 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:10,380 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:10,380 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:10,382 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:10,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:10,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:10,383 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:10,574 INFO L93 Difference]: Finished difference Result 188 states and 428 transitions. [2019-12-27 15:08:10,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:10,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:10,575 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:08:10,575 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:08:10,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:08:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 150. [2019-12-27 15:08:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:10,579 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:10,580 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:10,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:10,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:10,581 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:10,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,785 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 87 times [2019-12-27 15:08:10,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:10,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504833428] [2019-12-27 15:08:10,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:10,870 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 15:08:10,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504833428] [2019-12-27 15:08:10,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892990961] [2019-12-27 15:08:10,871 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:10,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:10,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:10,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:11,378 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 15:08:11,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:11,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:11,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1817673774] [2019-12-27 15:08:11,379 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:11,381 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:11,384 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:11,384 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:11,386 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:11,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:11,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:11,387 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:11,970 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-27 15:08:11,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:11,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:11,972 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:11,973 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:11,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=285, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2019-12-27 15:08:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:11,977 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:11,977 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:11,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:11,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:11,978 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,181 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,182 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 88 times [2019-12-27 15:08:12,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680920091] [2019-12-27 15:08:12,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,268 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 15:08:12,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680920091] [2019-12-27 15:08:12,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888599980] [2019-12-27 15:08:12,269 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:12,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:14,510 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 15:08:14,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:14,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:14,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270373280] [2019-12-27 15:08:14,511 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:14,512 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:14,514 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:14,514 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:14,516 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:14,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:14,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:14,517 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:15,480 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2019-12-27 15:08:15,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:15,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:15,482 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:15,482 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:15,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=132, Invalid=285, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:08:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:15,487 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:15,487 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:15,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:15,488 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:15,488 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:15,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,691 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 89 times [2019-12-27 15:08:15,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:15,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323306034] [2019-12-27 15:08:15,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:15,772 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 15:08:15,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323306034] [2019-12-27 15:08:15,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387607095] [2019-12-27 15:08:15,773 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,815 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:15,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:15,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:15,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:16,289 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:16,290 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 15:08:16,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:16,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [129012787] [2019-12-27 15:08:16,290 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:16,291 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:16,293 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:16,293 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:16,295 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:16,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:16,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:16,295 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:16,479 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-27 15:08:16,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:16,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:16,481 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:16,481 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:16,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 152. [2019-12-27 15:08:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:16,486 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:16,486 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:16,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:16,495 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:16,495 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:16,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,698 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 90 times [2019-12-27 15:08:16,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:16,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749486824] [2019-12-27 15:08:16,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749486824] [2019-12-27 15:08:16,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129603379] [2019-12-27 15:08:16,777 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:16,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:16,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:16,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:16,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:16,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1036500490] [2019-12-27 15:08:16,923 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:16,924 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:16,926 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:16,927 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:16,929 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:16,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:16,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:16,930 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:17,092 INFO L93 Difference]: Finished difference Result 192 states and 438 transitions. [2019-12-27 15:08:17,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:17,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:17,093 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:17,093 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:17,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-27 15:08:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:17,099 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:17,099 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:17,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:17,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:17,100 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:17,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,300 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 91 times [2019-12-27 15:08:17,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:17,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30427601] [2019-12-27 15:08:17,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,374 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 15:08:17,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30427601] [2019-12-27 15:08:17,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833550923] [2019-12-27 15:08:17,375 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:17,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:17,527 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 15:08:17,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:17,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:17,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1334389960] [2019-12-27 15:08:17,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:17,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:17,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:17,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:17,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:17,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:17,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:17,534 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:17,732 INFO L93 Difference]: Finished difference Result 195 states and 441 transitions. [2019-12-27 15:08:17,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:17,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:17,734 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:17,734 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:17,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2019-12-27 15:08:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:17,738 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:17,739 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:17,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:17,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:17,739 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:17,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,943 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 92 times [2019-12-27 15:08:17,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:17,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927484550] [2019-12-27 15:08:17,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:18,034 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 15:08:18,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927484550] [2019-12-27 15:08:18,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554877783] [2019-12-27 15:08:18,035 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:18,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:18,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:18,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:18,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:20,262 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 15:08:20,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:20,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [103853512] [2019-12-27 15:08:20,263 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:20,263 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:20,265 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:20,265 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:20,266 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:20,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:20,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:20,267 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:22,539 INFO L93 Difference]: Finished difference Result 198 states and 453 transitions. [2019-12-27 15:08:22,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:22,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:22,540 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:22,540 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:22,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=148, Invalid=313, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:08:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:22,543 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:22,543 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:22,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:22,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:22,544 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,745 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 93 times [2019-12-27 15:08:22,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53615040] [2019-12-27 15:08:22,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:22,829 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 15:08:22,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53615040] [2019-12-27 15:08:22,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375497937] [2019-12-27 15:08:22,830 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:22,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:22,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:22,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,003 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 15:08:23,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340706249] [2019-12-27 15:08:23,004 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,005 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,007 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:23,007 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,008 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:23,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,009 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,250 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-27 15:08:23,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,251 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:23,251 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:23,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:08:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:23,256 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,256 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:23,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,263 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,264 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,465 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 94 times [2019-12-27 15:08:23,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668701993] [2019-12-27 15:08:23,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668701993] [2019-12-27 15:08:23,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421805824] [2019-12-27 15:08:23,541 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:23,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451350817] [2019-12-27 15:08:23,747 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,748 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,750 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:23,750 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:23,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,752 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,995 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2019-12-27 15:08:23,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,996 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:23,996 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:23,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:23,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:08:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:24,000 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,000 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:24,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,000 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,001 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,201 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash -578026832, now seen corresponding path program 95 times [2019-12-27 15:08:24,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644375438] [2019-12-27 15:08:24,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,273 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 15:08:24,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644375438] [2019-12-27 15:08:24,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956882169] [2019-12-27 15:08:24,273 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:24,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,420 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 15:08:24,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2099700078] [2019-12-27 15:08:24,421 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,422 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,424 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:24,424 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:24,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,425 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,617 INFO L93 Difference]: Finished difference Result 199 states and 451 transitions. [2019-12-27 15:08:24,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,618 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:24,618 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:24,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2019-12-27 15:08:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:24,623 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,623 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:24,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,624 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,827 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 96 times [2019-12-27 15:08:24,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870503048] [2019-12-27 15:08:24,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870503048] [2019-12-27 15:08:24,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117105688] [2019-12-27 15:08:24,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,959 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:24,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [826008364] [2019-12-27 15:08:25,119 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:25,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,126 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:25,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,127 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,477 INFO L93 Difference]: Finished difference Result 200 states and 455 transitions. [2019-12-27 15:08:25,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:08:25,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,478 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:25,478 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:25,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2019-12-27 15:08:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:25,482 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,482 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:25,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,483 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,684 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash -578031637, now seen corresponding path program 97 times [2019-12-27 15:08:25,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380551028] [2019-12-27 15:08:25,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380551028] [2019-12-27 15:08:25,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887845291] [2019-12-27 15:08:25,762 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [186999328] [2019-12-27 15:08:25,922 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,923 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,924 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:25,924 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:25,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,927 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,118 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2019-12-27 15:08:26,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,119 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:26,119 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:26,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2019-12-27 15:08:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:26,123 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,124 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:26,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,124 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,325 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,326 INFO L82 PathProgramCache]: Analyzing trace with hash -578031792, now seen corresponding path program 98 times [2019-12-27 15:08:26,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023563385] [2019-12-27 15:08:26,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023563385] [2019-12-27 15:08:26,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108049700] [2019-12-27 15:08:26,392 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:26,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:26,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,548 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 15:08:26,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1551240206] [2019-12-27 15:08:26,549 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,550 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:26,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,553 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:26,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,554 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,707 INFO L93 Difference]: Finished difference Result 182 states and 416 transitions. [2019-12-27 15:08:26,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,707 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:26,708 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:26,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2019-12-27 15:08:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:26,711 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,711 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:26,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,711 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,915 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 99 times [2019-12-27 15:08:26,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229080348] [2019-12-27 15:08:26,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,989 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 15:08:26,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229080348] [2019-12-27 15:08:26,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531945114] [2019-12-27 15:08:26,990 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:27,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,119 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 15:08:27,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [218552549] [2019-12-27 15:08:27,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,123 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,124 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,278 INFO L93 Difference]: Finished difference Result 192 states and 438 transitions. [2019-12-27 15:08:27,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,279 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:27,279 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:27,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:08:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:27,283 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,283 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:27,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,284 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,485 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 100 times [2019-12-27 15:08:27,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829302647] [2019-12-27 15:08:27,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,553 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 15:08:27,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829302647] [2019-12-27 15:08:27,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840228002] [2019-12-27 15:08:27,554 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,596 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:27,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,687 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 15:08:27,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1692843239] [2019-12-27 15:08:27,688 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,689 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,691 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,691 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,692 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,692 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,862 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2019-12-27 15:08:27,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,863 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:27,863 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:27,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2019-12-27 15:08:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:27,867 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,867 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:27,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,868 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,868 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:28,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,071 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:28,072 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 101 times [2019-12-27 15:08:28,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:28,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174677304] [2019-12-27 15:08:28,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,155 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 15:08:28,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174677304] [2019-12-27 15:08:28,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355490916] [2019-12-27 15:08:28,156 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,206 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:28,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:28,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:28,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:28,299 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 15:08:28,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:28,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:28,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152998947] [2019-12-27 15:08:28,299 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:28,300 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:28,302 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:28,302 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:28,302 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:28,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:28,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:28,303 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:28,825 INFO L93 Difference]: Finished difference Result 197 states and 452 transitions. [2019-12-27 15:08:28,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:28,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:28,827 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:28,827 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:28,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 154. [2019-12-27 15:08:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:28,831 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:28,831 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:28,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:28,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:28,832 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,035 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 102 times [2019-12-27 15:08:29,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699020142] [2019-12-27 15:08:29,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699020142] [2019-12-27 15:08:29,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62783232] [2019-12-27 15:08:29,112 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:29,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:29,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2000535139] [2019-12-27 15:08:29,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,247 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,249 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,249 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,250 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,250 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,419 INFO L93 Difference]: Finished difference Result 205 states and 475 transitions. [2019-12-27 15:08:29,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,421 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:08:29,421 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 15:08:29,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 15:08:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2019-12-27 15:08:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:29,425 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,425 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:29,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,426 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,627 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,628 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 103 times [2019-12-27 15:08:29,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80614857] [2019-12-27 15:08:29,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,710 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 15:08:29,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80614857] [2019-12-27 15:08:29,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217147740] [2019-12-27 15:08:29,711 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,840 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 15:08:29,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1235203932] [2019-12-27 15:08:29,841 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,842 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,844 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,845 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,845 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,010 INFO L93 Difference]: Finished difference Result 198 states and 453 transitions. [2019-12-27 15:08:30,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,011 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:30,011 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:30,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2019-12-27 15:08:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:30,016 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,016 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:30,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,017 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,220 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 104 times [2019-12-27 15:08:30,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10748036] [2019-12-27 15:08:30,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10748036] [2019-12-27 15:08:30,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488837079] [2019-12-27 15:08:30,294 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:30,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:30,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:30,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946495838] [2019-12-27 15:08:30,417 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:30,418 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:30,420 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:30,420 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:30,421 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:30,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:30,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:30,421 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,588 INFO L93 Difference]: Finished difference Result 202 states and 466 transitions. [2019-12-27 15:08:30,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,589 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:08:30,589 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:08:30,590 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:08:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:08:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:30,593 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,593 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:30,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,593 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,794 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 105 times [2019-12-27 15:08:30,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440715627] [2019-12-27 15:08:30,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440715627] [2019-12-27 15:08:30,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891069357] [2019-12-27 15:08:30,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:30,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:31,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809646920] [2019-12-27 15:08:31,009 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,010 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,012 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:31,012 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,013 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:31,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,014 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,204 INFO L93 Difference]: Finished difference Result 199 states and 457 transitions. [2019-12-27 15:08:31,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,205 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:31,205 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:31,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:08:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:31,210 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,210 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:31,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,211 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:31,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,414 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash -716559942, now seen corresponding path program 106 times [2019-12-27 15:08:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:31,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203086208] [2019-12-27 15:08:31,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,491 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 15:08:31,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203086208] [2019-12-27 15:08:31,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042984611] [2019-12-27 15:08:31,492 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:31,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:31,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:31,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,621 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 15:08:31,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1709515165] [2019-12-27 15:08:31,622 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,623 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,625 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:31,625 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,625 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:31,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,626 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,780 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2019-12-27 15:08:31,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,781 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:31,782 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:31,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2019-12-27 15:08:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:31,786 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,786 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:31,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,787 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:31,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,990 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:31,991 INFO L82 PathProgramCache]: Analyzing trace with hash -721023632, now seen corresponding path program 107 times [2019-12-27 15:08:31,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:31,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936419446] [2019-12-27 15:08:31,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,062 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 15:08:32,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936419446] [2019-12-27 15:08:32,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895579913] [2019-12-27 15:08:32,063 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:32,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,194 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 15:08:32,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [828259183] [2019-12-27 15:08:32,195 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,195 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,197 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,197 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,198 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,198 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,356 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-27 15:08:32,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,358 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:32,358 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:32,358 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2019-12-27 15:08:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:32,361 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,361 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:32,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,362 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,362 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:32,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,563 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 108 times [2019-12-27 15:08:32,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:32,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860588431] [2019-12-27 15:08:32,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860588431] [2019-12-27 15:08:32,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861923745] [2019-12-27 15:08:32,641 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,683 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:32,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605310645] [2019-12-27 15:08:32,808 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,810 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,811 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,812 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,994 INFO L93 Difference]: Finished difference Result 206 states and 476 transitions. [2019-12-27 15:08:32,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,995 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:08:32,995 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:08:32,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:08:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2019-12-27 15:08:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:32,999 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,999 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:32,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:33,000 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:33,000 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,201 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 109 times [2019-12-27 15:08:33,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88651299] [2019-12-27 15:08:33,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:33,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88651299] [2019-12-27 15:08:33,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968884041] [2019-12-27 15:08:33,271 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:34,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834271067] [2019-12-27 15:08:34,238 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,239 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,240 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,240 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,241 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=167, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:34,242 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,438 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2019-12-27 15:08:34,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,439 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:34,439 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:34,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=284, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2019-12-27 15:08:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:34,443 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,444 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:34,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,444 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:34,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,645 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash -721028592, now seen corresponding path program 110 times [2019-12-27 15:08:34,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:34,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32235963] [2019-12-27 15:08:34,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:34,719 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 15:08:34,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32235963] [2019-12-27 15:08:34,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921658546] [2019-12-27 15:08:34,720 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:34,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:34,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:34,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,517 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 15:08:36,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:36,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807683879] [2019-12-27 15:08:36,518 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,519 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,521 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:36,521 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,522 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:36,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:36,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=167, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:36,522 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,061 INFO L93 Difference]: Finished difference Result 202 states and 466 transitions. [2019-12-27 15:08:37,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:37,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,062 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:08:37,063 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:08:37,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=282, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:08:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2019-12-27 15:08:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:37,066 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,066 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:37,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:37,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,067 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,268 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -721172587, now seen corresponding path program 111 times [2019-12-27 15:08:37,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014948419] [2019-12-27 15:08:37,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014948419] [2019-12-27 15:08:37,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118253912] [2019-12-27 15:08:37,339 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:37,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:37,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636286308] [2019-12-27 15:08:37,466 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,467 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,469 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:37,469 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,469 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:37,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:37,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:37,470 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,626 INFO L93 Difference]: Finished difference Result 200 states and 458 transitions. [2019-12-27 15:08:37,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:37,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,627 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:37,627 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:37,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2019-12-27 15:08:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:37,632 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,632 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:37,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:37,633 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,633 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,836 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash -721172742, now seen corresponding path program 112 times [2019-12-27 15:08:37,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248646093] [2019-12-27 15:08:37,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,913 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 15:08:37,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248646093] [2019-12-27 15:08:37,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66568980] [2019-12-27 15:08:37,914 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,970 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:37,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,452 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 15:08:39,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:39,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1890377464] [2019-12-27 15:08:39,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,455 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:39,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,458 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:39,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:39,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:39,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=168, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:39,459 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,675 INFO L93 Difference]: Finished difference Result 200 states and 461 transitions. [2019-12-27 15:08:39,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:39,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,677 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:39,677 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:39,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=136, Invalid=283, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2019-12-27 15:08:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:39,680 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,681 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:39,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:39,681 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,681 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,882 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -721177392, now seen corresponding path program 113 times [2019-12-27 15:08:39,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119525142] [2019-12-27 15:08:39,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:39,952 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 15:08:39,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119525142] [2019-12-27 15:08:39,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115027075] [2019-12-27 15:08:39,953 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,995 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:39,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:39,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:39,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:40,092 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 15:08:40,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:40,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:40,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [47293199] [2019-12-27 15:08:40,093 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:40,094 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:40,095 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:40,096 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:40,096 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:40,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:40,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:40,097 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:40,276 INFO L93 Difference]: Finished difference Result 189 states and 435 transitions. [2019-12-27 15:08:40,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:40,277 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:40,277 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:40,277 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:40,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 154. [2019-12-27 15:08:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:40,280 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:40,280 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:40,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:40,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:40,282 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:40,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,484 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 114 times [2019-12-27 15:08:40,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:40,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407282838] [2019-12-27 15:08:40,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:40,552 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 15:08:40,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407282838] [2019-12-27 15:08:40,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154191895] [2019-12-27 15:08:40,553 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,597 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:40,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:40,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:40,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:40,716 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 15:08:40,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:40,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:40,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982624162] [2019-12-27 15:08:40,717 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:40,718 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:40,720 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:40,720 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:40,720 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:40,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:40,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:40,721 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:40,881 INFO L93 Difference]: Finished difference Result 171 states and 396 transitions. [2019-12-27 15:08:40,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:40,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:40,882 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:08:40,883 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:08:40,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:08:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2019-12-27 15:08:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 363 transitions. [2019-12-27 15:08:40,888 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 363 transitions. Word has length 13 [2019-12-27 15:08:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:40,888 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 363 transitions. [2019-12-27 15:08:40,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 363 transitions. [2019-12-27 15:08:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:40,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:40,889 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:41,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,090 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 15:08:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:41,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830641318] [2019-12-27 15:08:41,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,184 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 15:08:41,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830641318] [2019-12-27 15:08:41,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033999345] [2019-12-27 15:08:41,185 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:08:41,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:41,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:08:41,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 15:08:41,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [596382682] [2019-12-27 15:08:41,306 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:41,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:41,309 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 15:08:41,310 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:41,312 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 16 times. [2019-12-27 15:08:41,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:41,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:08:41,313 INFO L87 Difference]: Start difference. First operand 154 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:41,336 INFO L93 Difference]: Finished difference Result 203 states and 483 transitions. [2019-12-27 15:08:41,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:41,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:41,338 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:08:41,338 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:41,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:08:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-12-27 15:08:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-12-27 15:08:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 468 transitions. [2019-12-27 15:08:41,341 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 468 transitions. Word has length 13 [2019-12-27 15:08:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:41,341 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 468 transitions. [2019-12-27 15:08:41,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 468 transitions. [2019-12-27 15:08:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:41,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:41,342 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:41,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,543 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 115 times [2019-12-27 15:08:41,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:41,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871474334] [2019-12-27 15:08:41,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,629 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 15:08:41,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871474334] [2019-12-27 15:08:41,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823319994] [2019-12-27 15:08:41,630 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:41,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:41,787 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 15:08:41,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:41,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:41,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2083328972] [2019-12-27 15:08:41,788 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:41,789 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:41,791 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:08:41,792 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:41,792 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:41,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:41,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:41,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:41,792 INFO L87 Difference]: Start difference. First operand 195 states and 468 transitions. Second operand 10 states. [2019-12-27 15:08:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:41,827 INFO L93 Difference]: Finished difference Result 214 states and 504 transitions. [2019-12-27 15:08:41,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:41,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:41,828 INFO L225 Difference]: With dead ends: 214 [2019-12-27 15:08:41,828 INFO L226 Difference]: Without dead ends: 212 [2019-12-27 15:08:41,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-27 15:08:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2019-12-27 15:08:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-27 15:08:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2019-12-27 15:08:41,833 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 14 [2019-12-27 15:08:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:41,833 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2019-12-27 15:08:41,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2019-12-27 15:08:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:41,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:41,834 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:42,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,036 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 116 times [2019-12-27 15:08:42,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:42,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128911697] [2019-12-27 15:08:42,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:42,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128911697] [2019-12-27 15:08:42,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859545434] [2019-12-27 15:08:42,116 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:42,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:42,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:42,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:42,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:42,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:42,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1878264490] [2019-12-27 15:08:42,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:42,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:42,323 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:42,323 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:42,323 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:42,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:42,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:42,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:42,324 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand 10 states. [2019-12-27 15:08:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:42,393 INFO L93 Difference]: Finished difference Result 227 states and 532 transitions. [2019-12-27 15:08:42,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:42,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:42,395 INFO L225 Difference]: With dead ends: 227 [2019-12-27 15:08:42,395 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 15:08:42,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:08:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 15:08:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 196. [2019-12-27 15:08:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 15:08:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 476 transitions. [2019-12-27 15:08:42,401 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 476 transitions. Word has length 14 [2019-12-27 15:08:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:42,402 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 476 transitions. [2019-12-27 15:08:42,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 476 transitions. [2019-12-27 15:08:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:42,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:42,403 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:42,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,607 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:42,608 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 117 times [2019-12-27 15:08:42,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:42,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259067971] [2019-12-27 15:08:42,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:42,737 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 15:08:42,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259067971] [2019-12-27 15:08:42,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823165289] [2019-12-27 15:08:42,738 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:42,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:42,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:42,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,687 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 15:08:43,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [404798840] [2019-12-27 15:08:43,687 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,688 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,690 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:43,690 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,690 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:43,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:43,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=198, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:43,691 INFO L87 Difference]: Start difference. First operand 196 states and 476 transitions. Second operand 10 states. [2019-12-27 15:08:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:43,749 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-27 15:08:43,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:43,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:43,751 INFO L225 Difference]: With dead ends: 227 [2019-12-27 15:08:43,751 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 15:08:43,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=217, Unknown=1, NotChecked=0, Total=342 [2019-12-27 15:08:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 15:08:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 196. [2019-12-27 15:08:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 15:08:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 475 transitions. [2019-12-27 15:08:43,754 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 475 transitions. Word has length 14 [2019-12-27 15:08:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:43,754 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 475 transitions. [2019-12-27 15:08:43,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 475 transitions. [2019-12-27 15:08:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:43,755 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:43,755 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:43,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:43,955 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 118 times [2019-12-27 15:08:43,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:43,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671649467] [2019-12-27 15:08:43,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:44,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671649467] [2019-12-27 15:08:44,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117175717] [2019-12-27 15:08:44,032 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:44,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:44,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:44,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:44,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:44,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:44,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1176253367] [2019-12-27 15:08:44,193 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:44,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:44,196 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:44,196 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:44,196 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:44,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:44,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:44,196 INFO L87 Difference]: Start difference. First operand 196 states and 475 transitions. Second operand 10 states. [2019-12-27 15:08:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:44,292 INFO L93 Difference]: Finished difference Result 235 states and 551 transitions. [2019-12-27 15:08:44,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:44,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:44,293 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:08:44,293 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 15:08:44,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 15:08:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2019-12-27 15:08:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 15:08:44,299 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 15:08:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:44,299 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 15:08:44,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 15:08:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:44,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:44,300 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:44,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,503 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:44,503 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 119 times [2019-12-27 15:08:44,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:44,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762802414] [2019-12-27 15:08:44,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:44,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762802414] [2019-12-27 15:08:44,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389421193] [2019-12-27 15:08:44,579 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:44,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:44,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:44,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:45,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:45,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:45,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [964816019] [2019-12-27 15:08:45,240 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:45,241 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:45,243 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:45,244 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:45,244 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:45,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:45,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:45,244 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 10 states. [2019-12-27 15:08:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:45,330 INFO L93 Difference]: Finished difference Result 251 states and 586 transitions. [2019-12-27 15:08:45,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:45,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:45,332 INFO L225 Difference]: With dead ends: 251 [2019-12-27 15:08:45,332 INFO L226 Difference]: Without dead ends: 250 [2019-12-27 15:08:45,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=243, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-27 15:08:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 199. [2019-12-27 15:08:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 15:08:45,337 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 15:08:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:45,337 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 15:08:45,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 15:08:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:45,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:45,338 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:45,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:45,541 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 120 times [2019-12-27 15:08:45,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:45,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354600730] [2019-12-27 15:08:45,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:45,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354600730] [2019-12-27 15:08:45,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174138647] [2019-12-27 15:08:45,620 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:45,662 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:45,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:45,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:45,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:46,543 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_390 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_390) 1)) (<= c_~i~0 (+ v_~j~0_390 c_~j~0 1)) (<= (div (+ (* v_~j~0_390 (- 1)) 1) (- 4)) 1))) is different from true [2019-12-27 15:08:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:46,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:46,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:46,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574913886] [2019-12-27 15:08:46,544 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:46,545 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:46,547 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:46,547 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:46,547 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:46,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:46,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=173, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:46,548 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 10 states. [2019-12-27 15:08:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:46,641 INFO L93 Difference]: Finished difference Result 243 states and 569 transitions. [2019-12-27 15:08:46,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:46,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:46,642 INFO L225 Difference]: With dead ends: 243 [2019-12-27 15:08:46,642 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 15:08:46,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=210, Unknown=1, NotChecked=34, Total=380 [2019-12-27 15:08:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 15:08:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 200. [2019-12-27 15:08:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 15:08:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 491 transitions. [2019-12-27 15:08:46,646 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 491 transitions. Word has length 14 [2019-12-27 15:08:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:46,646 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 491 transitions. [2019-12-27 15:08:46,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 491 transitions. [2019-12-27 15:08:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:46,647 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:46,647 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:46,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,850 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:46,851 INFO L82 PathProgramCache]: Analyzing trace with hash 802742867, now seen corresponding path program 121 times [2019-12-27 15:08:46,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:46,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224452174] [2019-12-27 15:08:46,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:46,926 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 15:08:46,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224452174] [2019-12-27 15:08:46,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499655657] [2019-12-27 15:08:46,927 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:46,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:46,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,145 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 15:08:47,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:47,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:47,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1715690059] [2019-12-27 15:08:47,145 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:47,146 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:47,148 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:47,148 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:47,148 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:47,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:47,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:47,149 INFO L87 Difference]: Start difference. First operand 200 states and 491 transitions. Second operand 10 states. [2019-12-27 15:08:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:47,795 INFO L93 Difference]: Finished difference Result 235 states and 555 transitions. [2019-12-27 15:08:47,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:47,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:47,796 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:08:47,797 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 15:08:47,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=235, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 15:08:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 199. [2019-12-27 15:08:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-27 15:08:47,801 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-27 15:08:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:47,802 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-27 15:08:47,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-27 15:08:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:47,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:47,802 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:48,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,003 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 122 times [2019-12-27 15:08:48,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:48,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281196951] [2019-12-27 15:08:48,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281196951] [2019-12-27 15:08:48,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664416092] [2019-12-27 15:08:48,081 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:48,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:48,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:48,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:48,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:48,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357625436] [2019-12-27 15:08:48,255 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:48,256 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:48,259 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:48,259 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:48,259 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:48,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:48,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:48,260 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 10 states. [2019-12-27 15:08:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:48,405 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-27 15:08:48,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:48,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:48,407 INFO L225 Difference]: With dead ends: 238 [2019-12-27 15:08:48,407 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 15:08:48,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 15:08:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-27 15:08:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:48,413 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:48,413 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:48,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:48,414 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:48,415 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:48,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,615 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 123 times [2019-12-27 15:08:48,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:48,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143786822] [2019-12-27 15:08:48,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143786822] [2019-12-27 15:08:48,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167517650] [2019-12-27 15:08:48,744 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:48,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:48,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:48,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:49,570 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:49,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:49,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1557777166] [2019-12-27 15:08:49,571 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:49,572 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:49,574 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:49,574 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:49,574 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:49,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:49,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:49,575 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:50,016 INFO L93 Difference]: Finished difference Result 266 states and 622 transitions. [2019-12-27 15:08:50,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:50,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:50,018 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:08:50,018 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:08:50,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:08:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-27 15:08:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:50,022 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:50,022 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:50,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:50,023 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:50,023 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:50,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,224 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 124 times [2019-12-27 15:08:50,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:50,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986418453] [2019-12-27 15:08:50,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:50,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986418453] [2019-12-27 15:08:50,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065678793] [2019-12-27 15:08:50,305 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:50,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:50,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:50,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:51,158 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:08:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:51,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:51,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:51,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403099017] [2019-12-27 15:08:51,160 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:51,161 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:51,162 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:51,163 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:51,163 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:51,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:51,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:51,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=205, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:51,163 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:52,609 INFO L93 Difference]: Finished difference Result 268 states and 627 transitions. [2019-12-27 15:08:52,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:52,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:52,611 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:08:52,611 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:08:52,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=148, Invalid=269, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:08:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 204. [2019-12-27 15:08:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:08:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-27 15:08:52,617 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-27 15:08:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:52,617 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-27 15:08:52,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-27 15:08:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:52,618 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:52,618 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:52,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,821 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 125 times [2019-12-27 15:08:52,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:52,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977800647] [2019-12-27 15:08:52,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977800647] [2019-12-27 15:08:52,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420877314] [2019-12-27 15:08:52,899 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,945 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:52,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:52,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:52,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:55,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:55,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331314924] [2019-12-27 15:08:55,308 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:55,309 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:55,311 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:55,311 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:55,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:55,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:55,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:55,312 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 10 states. [2019-12-27 15:08:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:56,447 INFO L93 Difference]: Finished difference Result 264 states and 621 transitions. [2019-12-27 15:08:56,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:56,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:56,449 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:08:56,449 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:08:56,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=152, Invalid=265, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:08:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 203. [2019-12-27 15:08:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:56,454 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:56,454 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:56,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:56,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:56,454 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:56,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,655 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 126 times [2019-12-27 15:08:56,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:56,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786504029] [2019-12-27 15:08:56,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786504029] [2019-12-27 15:08:56,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141749595] [2019-12-27 15:08:56,746 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:56,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:56,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:56,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:57,310 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_416 Int)) (and (<= c_~i~0 (+ v_~j~0_416 c_~j~0 1)) (<= c_~j~0 (+ (* 2 v_~j~0_416) 1)) (<= (div (+ (* v_~j~0_416 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 15:08:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-27 15:08:57,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:57,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:57,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [840252326] [2019-12-27 15:08:57,328 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:57,329 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:57,332 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:57,332 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:57,332 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:57,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:57,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:57,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=179, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:57,332 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:57,868 INFO L93 Difference]: Finished difference Result 257 states and 604 transitions. [2019-12-27 15:08:57,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:57,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:57,869 INFO L225 Difference]: With dead ends: 257 [2019-12-27 15:08:57,869 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 15:08:57,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=239, Unknown=2, NotChecked=36, Total=420 [2019-12-27 15:08:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 15:08:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 205. [2019-12-27 15:08:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:08:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 510 transitions. [2019-12-27 15:08:57,874 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 510 transitions. Word has length 14 [2019-12-27 15:08:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:57,874 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 510 transitions. [2019-12-27 15:08:57,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 510 transitions. [2019-12-27 15:08:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:57,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:57,874 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:58,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,075 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 127 times [2019-12-27 15:08:58,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:58,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740139299] [2019-12-27 15:08:58,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740139299] [2019-12-27 15:08:58,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996133171] [2019-12-27 15:08:58,161 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,667 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_420 Int)) (and (<= (div (+ (* v_~j~0_420 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 3 v_~j~0_420) 2)) (<= c_~j~0 (+ c_~i~0 (* 2 v_~j~0_420) 1)))) is different from true [2019-12-27 15:08:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [654971040] [2019-12-27 15:08:59,668 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,669 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,671 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:59,671 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=177, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:59,672 INFO L87 Difference]: Start difference. First operand 205 states and 510 transitions. Second operand 10 states. [2019-12-27 15:09:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:00,657 INFO L93 Difference]: Finished difference Result 259 states and 613 transitions. [2019-12-27 15:09:00,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:00,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:00,659 INFO L225 Difference]: With dead ends: 259 [2019-12-27 15:09:00,659 INFO L226 Difference]: Without dead ends: 258 [2019-12-27 15:09:00,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=146, Invalid=236, Unknown=2, NotChecked=36, Total=420 [2019-12-27 15:09:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-12-27 15:09:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2019-12-27 15:09:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:09:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-27 15:09:00,663 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-27 15:09:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:00,664 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-27 15:09:00,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-27 15:09:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:00,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:00,664 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:00,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,868 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 128 times [2019-12-27 15:09:00,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:00,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581603632] [2019-12-27 15:09:00,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581603632] [2019-12-27 15:09:00,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352118768] [2019-12-27 15:09:00,946 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:00,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:00,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:00,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:02,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:02,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:02,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1047346699] [2019-12-27 15:09:02,365 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:02,365 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:02,368 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:09:02,368 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:02,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:02,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:02,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=199, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:02,368 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 10 states. [2019-12-27 15:09:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:04,523 INFO L93 Difference]: Finished difference Result 253 states and 598 transitions. [2019-12-27 15:09:04,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:04,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:04,525 INFO L225 Difference]: With dead ends: 253 [2019-12-27 15:09:04,525 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 15:09:04,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=153, Invalid=264, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:09:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 15:09:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 205. [2019-12-27 15:09:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:09:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 510 transitions. [2019-12-27 15:09:04,530 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 510 transitions. Word has length 14 [2019-12-27 15:09:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:04,531 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 510 transitions. [2019-12-27 15:09:04,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 510 transitions. [2019-12-27 15:09:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:04,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:04,531 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,735 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 834917147, now seen corresponding path program 129 times [2019-12-27 15:09:04,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486732864] [2019-12-27 15:09:04,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,820 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 15:09:04,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486732864] [2019-12-27 15:09:04,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951915968] [2019-12-27 15:09:04,821 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:04,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:04,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:07,224 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 15:09:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:07,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:07,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80735828] [2019-12-27 15:09:07,225 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:07,227 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:07,229 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:09:07,230 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:07,230 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:07,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=195, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:09:07,231 INFO L87 Difference]: Start difference. First operand 205 states and 510 transitions. Second operand 10 states. [2019-12-27 15:09:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:07,623 INFO L93 Difference]: Finished difference Result 240 states and 571 transitions. [2019-12-27 15:09:07,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:07,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:07,624 INFO L225 Difference]: With dead ends: 240 [2019-12-27 15:09:07,625 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 15:09:07,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=157, Invalid=261, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:09:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 15:09:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2019-12-27 15:09:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:09:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-27 15:09:07,629 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-27 15:09:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:07,629 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-27 15:09:07,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-27 15:09:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:07,630 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:07,630 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:07,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:07,830 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 130 times [2019-12-27 15:09:07,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:07,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788699206] [2019-12-27 15:09:07,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:07,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788699206] [2019-12-27 15:09:07,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86114573] [2019-12-27 15:09:07,913 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:07,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:07,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:07,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:07,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:08,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:08,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:08,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [784183437] [2019-12-27 15:09:08,082 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:08,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:08,086 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:08,086 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:08,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:08,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:08,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:08,087 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 10 states. [2019-12-27 15:09:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:08,210 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-27 15:09:08,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:08,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:08,212 INFO L225 Difference]: With dead ends: 236 [2019-12-27 15:09:08,212 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 15:09:08,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 15:09:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-27 15:09:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:09:08,216 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:09:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:08,216 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:09:08,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:09:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:08,216 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:08,216 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:08,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:08,417 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 131 times [2019-12-27 15:09:08,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:08,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791111648] [2019-12-27 15:09:08,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:08,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791111648] [2019-12-27 15:09:08,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556728343] [2019-12-27 15:09:08,498 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:08,542 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:08,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:08,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:08,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:08,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:08,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:08,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [921364828] [2019-12-27 15:09:08,674 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:08,675 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:08,677 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:08,678 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:08,678 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:08,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:08,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:08,679 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:09:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:08,864 INFO L93 Difference]: Finished difference Result 266 states and 630 transitions. [2019-12-27 15:09:08,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:08,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:08,865 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:09:08,865 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:09:08,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:09:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2019-12-27 15:09:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:09:08,869 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:09:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:08,869 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:09:08,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:09:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:08,869 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:08,869 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:09,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,070 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 132 times [2019-12-27 15:09:09,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:09,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740742276] [2019-12-27 15:09:09,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:09,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740742276] [2019-12-27 15:09:09,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14545968] [2019-12-27 15:09:09,158 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:09,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:09,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:09,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:09,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:09,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:09,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1480461942] [2019-12-27 15:09:09,332 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:09,334 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:09,336 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:09,336 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:09,336 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:09,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:09,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:09,337 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:09:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:09,559 INFO L93 Difference]: Finished difference Result 282 states and 664 transitions. [2019-12-27 15:09:09,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:09,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:09,560 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:09:09,560 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:09:09,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:09:09,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 209. [2019-12-27 15:09:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:09:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:09:09,564 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:09:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:09,565 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:09:09,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:09:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:09,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:09,565 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:09,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,769 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 133 times [2019-12-27 15:09:09,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:09,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573080665] [2019-12-27 15:09:09,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:09,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573080665] [2019-12-27 15:09:09,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609591892] [2019-12-27 15:09:09,856 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:09,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:09,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:10,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:10,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:10,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431631577] [2019-12-27 15:09:10,051 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:10,052 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:10,054 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:10,054 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:10,055 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:10,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:10,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:10,056 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:09:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:10,220 INFO L93 Difference]: Finished difference Result 279 states and 660 transitions. [2019-12-27 15:09:10,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:10,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:10,222 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:10,222 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:10,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 208. [2019-12-27 15:09:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:09:10,228 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:09:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:10,228 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:09:10,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:09:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:10,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:10,229 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:10,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,432 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 134 times [2019-12-27 15:09:10,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:10,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752964028] [2019-12-27 15:09:10,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:10,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752964028] [2019-12-27 15:09:10,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865820039] [2019-12-27 15:09:10,508 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:10,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:10,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:10,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:11,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:11,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:11,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521901028] [2019-12-27 15:09:11,167 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:11,167 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:11,169 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:11,169 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:11,170 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:11,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:11,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=210, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:11,171 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:09:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:11,349 INFO L93 Difference]: Finished difference Result 280 states and 662 transitions. [2019-12-27 15:09:11,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:11,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:11,350 INFO L225 Difference]: With dead ends: 280 [2019-12-27 15:09:11,351 INFO L226 Difference]: Without dead ends: 279 [2019-12-27 15:09:11,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=304, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-12-27 15:09:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 210. [2019-12-27 15:09:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:11,355 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:11,356 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:11,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:11,356 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:11,356 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:11,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:11,557 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 135 times [2019-12-27 15:09:11,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:11,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757377332] [2019-12-27 15:09:11,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:11,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757377332] [2019-12-27 15:09:11,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999100806] [2019-12-27 15:09:11,643 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:11,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:11,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:11,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:09:11,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:11,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [846685645] [2019-12-27 15:09:11,790 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:11,792 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:11,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:11,794 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:11,794 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:11,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:11,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:11,795 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:11,943 INFO L93 Difference]: Finished difference Result 279 states and 663 transitions. [2019-12-27 15:09:11,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:11,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:11,945 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:11,945 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:11,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2019-12-27 15:09:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:09:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:09:11,949 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:09:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:11,949 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:09:11,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:09:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:11,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:11,949 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:12,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:12,150 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 136 times [2019-12-27 15:09:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:12,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263351220] [2019-12-27 15:09:12,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:12,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263351220] [2019-12-27 15:09:12,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226597336] [2019-12-27 15:09:12,228 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:12,272 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:12,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:12,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:12,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:12,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:12,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:12,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [241929469] [2019-12-27 15:09:12,454 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:12,455 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:12,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:12,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:12,457 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:12,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:12,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:12,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:12,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:12,458 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:09:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:17,207 INFO L93 Difference]: Finished difference Result 281 states and 667 transitions. [2019-12-27 15:09:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:17,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:17,209 INFO L225 Difference]: With dead ends: 281 [2019-12-27 15:09:17,209 INFO L226 Difference]: Without dead ends: 280 [2019-12-27 15:09:17,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=160, Invalid=300, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-12-27 15:09:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2019-12-27 15:09:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:17,213 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:17,214 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:17,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:17,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:17,214 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:17,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,415 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937432, now seen corresponding path program 137 times [2019-12-27 15:09:17,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:17,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596362398] [2019-12-27 15:09:17,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596362398] [2019-12-27 15:09:17,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745924517] [2019-12-27 15:09:17,540 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:17,608 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:17,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:17,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:17,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:17,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:17,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:17,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1734604934] [2019-12-27 15:09:17,934 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:17,936 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:17,940 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:17,940 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:17,940 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:17,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:17,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:17,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:17,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:17,942 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:18,130 INFO L93 Difference]: Finished difference Result 268 states and 638 transitions. [2019-12-27 15:09:18,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:18,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:18,131 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:09:18,131 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:09:18,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:09:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 208. [2019-12-27 15:09:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:09:18,135 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:09:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:18,136 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:09:18,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:09:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:18,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:18,137 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:18,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,337 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 138 times [2019-12-27 15:09:18,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:18,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809809050] [2019-12-27 15:09:18,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:18,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809809050] [2019-12-27 15:09:18,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807889035] [2019-12-27 15:09:18,414 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,460 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:09:18,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:18,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:18,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:18,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:18,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:18,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1433749383] [2019-12-27 15:09:18,687 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:18,688 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:18,691 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:18,691 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:18,691 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:18,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:18,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:18,692 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:09:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:18,880 INFO L93 Difference]: Finished difference Result 266 states and 630 transitions. [2019-12-27 15:09:18,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:18,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:18,881 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:09:18,881 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:09:18,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:09:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2019-12-27 15:09:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:18,886 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:18,886 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:18,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:18,886 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:18,886 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:19,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,087 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 139 times [2019-12-27 15:09:19,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:19,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902700225] [2019-12-27 15:09:19,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:19,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902700225] [2019-12-27 15:09:19,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041127274] [2019-12-27 15:09:19,173 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:19,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:21,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:21,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [118077376] [2019-12-27 15:09:21,430 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:21,431 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:21,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:21,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:21,433 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:21,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:21,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:21,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:21,434 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:21,706 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:09:21,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:21,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:21,709 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:21,709 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:21,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 210. [2019-12-27 15:09:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:21,714 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:21,714 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:21,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:21,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:21,715 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:21,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,919 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 140 times [2019-12-27 15:09:21,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:21,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893006227] [2019-12-27 15:09:21,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893006227] [2019-12-27 15:09:22,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460103800] [2019-12-27 15:09:22,001 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:22,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:22,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:22,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1251699894] [2019-12-27 15:09:22,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,232 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:22,232 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:22,232 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:22,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:22,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:22,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:22,232 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:22,407 INFO L93 Difference]: Finished difference Result 269 states and 638 transitions. [2019-12-27 15:09:22,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:22,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:22,408 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:09:22,409 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:09:22,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:09:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 211. [2019-12-27 15:09:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:22,413 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:22,413 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:22,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:22,414 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:22,414 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:22,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,615 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 141 times [2019-12-27 15:09:22,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:22,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215481771] [2019-12-27 15:09:22,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215481771] [2019-12-27 15:09:22,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188347657] [2019-12-27 15:09:22,693 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:22,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:22,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:22,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [448758839] [2019-12-27 15:09:22,944 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,945 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:22,947 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:22,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:22,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:22,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:22,947 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:23,123 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2019-12-27 15:09:23,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:23,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:23,125 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:23,125 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:23,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 209. [2019-12-27 15:09:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:09:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:09:23,130 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:09:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:23,130 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:09:23,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:09:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:23,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:23,130 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:23,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:23,331 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 142 times [2019-12-27 15:09:23,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:23,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468952951] [2019-12-27 15:09:23,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:23,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468952951] [2019-12-27 15:09:23,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202350006] [2019-12-27 15:09:23,438 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:23,483 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:23,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:23,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:23,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:23,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:23,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:23,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [513719478] [2019-12-27 15:09:23,669 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:23,670 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:23,672 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:23,672 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:23,672 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:23,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:23,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:23,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:23,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:23,673 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:09:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:25,980 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2019-12-27 15:09:25,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:25,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:25,981 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:25,981 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:25,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=159, Invalid=302, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 211. [2019-12-27 15:09:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:25,987 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:25,987 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:25,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:25,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:25,989 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:26,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:26,192 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324632, now seen corresponding path program 143 times [2019-12-27 15:09:26,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:26,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484080833] [2019-12-27 15:09:26,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:26,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484080833] [2019-12-27 15:09:26,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459514092] [2019-12-27 15:09:26,272 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:26,312 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:26,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:26,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:26,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:29,735 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-27 15:09:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:29,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:29,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:29,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1953571392] [2019-12-27 15:09:29,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:29,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:29,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:29,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:29,739 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:29,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:29,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:29,739 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:30,012 INFO L93 Difference]: Finished difference Result 267 states and 642 transitions. [2019-12-27 15:09:30,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:30,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:30,013 INFO L225 Difference]: With dead ends: 267 [2019-12-27 15:09:30,013 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 15:09:30,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=165, Invalid=296, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 15:09:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2019-12-27 15:09:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:30,018 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:30,018 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:30,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:30,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:30,019 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:30,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,219 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319982, now seen corresponding path program 144 times [2019-12-27 15:09:30,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:30,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230074235] [2019-12-27 15:09:30,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230074235] [2019-12-27 15:09:30,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529108886] [2019-12-27 15:09:30,298 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:30,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:30,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:30,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:30,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:30,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [770203777] [2019-12-27 15:09:30,541 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:30,542 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:30,544 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:30,544 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:30,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:30,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:30,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:30,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:30,545 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:32,899 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2019-12-27 15:09:32,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:32,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:32,900 INFO L225 Difference]: With dead ends: 260 [2019-12-27 15:09:32,900 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 15:09:32,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=162, Invalid=299, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 15:09:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2019-12-27 15:09:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:32,904 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:32,904 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:32,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:32,905 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:32,905 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:33,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,106 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319827, now seen corresponding path program 145 times [2019-12-27 15:09:33,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:33,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888517277] [2019-12-27 15:09:33,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,191 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 15:09:33,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888517277] [2019-12-27 15:09:33,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182244762] [2019-12-27 15:09:33,191 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:33,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:33,502 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 15:09:33,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:33,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:33,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741264930] [2019-12-27 15:09:33,503 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:33,504 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:33,506 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:33,506 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:33,506 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:33,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:33,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:33,507 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:33,683 INFO L93 Difference]: Finished difference Result 242 states and 581 transitions. [2019-12-27 15:09:33,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:33,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:33,685 INFO L225 Difference]: With dead ends: 242 [2019-12-27 15:09:33,685 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 15:09:33,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 15:09:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2019-12-27 15:09:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 520 transitions. [2019-12-27 15:09:33,688 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 520 transitions. Word has length 14 [2019-12-27 15:09:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:33,688 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 520 transitions. [2019-12-27 15:09:33,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 520 transitions. [2019-12-27 15:09:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:33,688 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:33,688 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:33,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,889 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018186, now seen corresponding path program 146 times [2019-12-27 15:09:33,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:33,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882491510] [2019-12-27 15:09:33,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,973 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 15:09:33,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882491510] [2019-12-27 15:09:33,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132931565] [2019-12-27 15:09:33,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:34,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:34,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:34,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:34,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:34,121 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 15:09:34,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:34,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:34,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [311812763] [2019-12-27 15:09:34,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:34,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:34,126 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:34,126 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:34,126 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:34,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:34,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:34,126 INFO L87 Difference]: Start difference. First operand 208 states and 520 transitions. Second operand 10 states. [2019-12-27 15:09:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:34,286 INFO L93 Difference]: Finished difference Result 229 states and 558 transitions. [2019-12-27 15:09:34,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:34,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:34,287 INFO L225 Difference]: With dead ends: 229 [2019-12-27 15:09:34,287 INFO L226 Difference]: Without dead ends: 220 [2019-12-27 15:09:34,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-27 15:09:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2019-12-27 15:09:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:34,293 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:34,293 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:34,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:34,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:34,294 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:34,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:34,498 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 147 times [2019-12-27 15:09:34,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:34,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250517957] [2019-12-27 15:09:34,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:34,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250517957] [2019-12-27 15:09:34,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515349297] [2019-12-27 15:09:34,627 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:34,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:34,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:34,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:34,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:34,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:34,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:34,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [286184404] [2019-12-27 15:09:34,907 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:34,909 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:34,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:34,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:34,913 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:34,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:34,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:34,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:34,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:34,915 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:35,221 INFO L93 Difference]: Finished difference Result 257 states and 614 transitions. [2019-12-27 15:09:35,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:35,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:35,223 INFO L225 Difference]: With dead ends: 257 [2019-12-27 15:09:35,223 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 15:09:35,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 15:09:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 214. [2019-12-27 15:09:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:35,230 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:35,230 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:35,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:35,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:35,232 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:35,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:35,436 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 148 times [2019-12-27 15:09:35,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:35,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690527459] [2019-12-27 15:09:35,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:35,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690527459] [2019-12-27 15:09:35,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486285287] [2019-12-27 15:09:35,545 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:35,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:35,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:35,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:35,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:37,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:37,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:37,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1060402599] [2019-12-27 15:09:37,112 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:37,113 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:37,114 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:37,114 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:37,114 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:37,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:37,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=217, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:09:37,115 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:38,276 INFO L93 Difference]: Finished difference Result 272 states and 647 transitions. [2019-12-27 15:09:38,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:38,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:38,277 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:09:38,278 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:09:38,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=161, Invalid=340, Unknown=5, NotChecked=0, Total=506 [2019-12-27 15:09:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:09:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 215. [2019-12-27 15:09:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:38,281 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:38,282 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:38,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:38,282 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:38,282 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:38,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,483 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 149 times [2019-12-27 15:09:38,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:38,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543194870] [2019-12-27 15:09:38,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:38,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543194870] [2019-12-27 15:09:38,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669755157] [2019-12-27 15:09:38,636 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:38,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:38,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:38,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:38,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:38,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:38,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351960626] [2019-12-27 15:09:38,853 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:38,854 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:38,856 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:38,857 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:38,857 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:38,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:38,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:38,858 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:39,114 INFO L93 Difference]: Finished difference Result 270 states and 644 transitions. [2019-12-27 15:09:39,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:39,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:39,116 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:39,116 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:39,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 214. [2019-12-27 15:09:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:39,123 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:39,124 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:39,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:39,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:39,125 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:39,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:39,330 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 150 times [2019-12-27 15:09:39,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:39,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247369671] [2019-12-27 15:09:39,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:39,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247369671] [2019-12-27 15:09:39,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191611480] [2019-12-27 15:09:39,431 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:39,476 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:39,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:39,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:39,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:39,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:39,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:39,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261383993] [2019-12-27 15:09:39,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:39,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:39,698 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:39,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:39,699 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:39,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:39,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:39,699 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:40,845 INFO L93 Difference]: Finished difference Result 275 states and 653 transitions. [2019-12-27 15:09:40,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:40,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:40,847 INFO L225 Difference]: With dead ends: 275 [2019-12-27 15:09:40,847 INFO L226 Difference]: Without dead ends: 274 [2019-12-27 15:09:40,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-27 15:09:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 216. [2019-12-27 15:09:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:40,852 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:40,852 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:40,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:40,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:40,853 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:41,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:41,055 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:41,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 151 times [2019-12-27 15:09:41,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:41,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213954665] [2019-12-27 15:09:41,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:41,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213954665] [2019-12-27 15:09:41,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800436599] [2019-12-27 15:09:41,150 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:41,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:41,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:45,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:45,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:45,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [430666574] [2019-12-27 15:09:45,880 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:45,881 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:45,883 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:45,883 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:45,883 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:45,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:45,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:45,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:45,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=211, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:09:45,884 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,844 INFO L93 Difference]: Finished difference Result 277 states and 660 transitions. [2019-12-27 15:09:46,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,845 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:09:46,845 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:09:46,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=165, Invalid=337, Unknown=4, NotChecked=0, Total=506 [2019-12-27 15:09:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:09:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 215. [2019-12-27 15:09:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:46,850 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,850 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:46,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,851 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:47,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,052 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 152 times [2019-12-27 15:09:47,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:47,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267091009] [2019-12-27 15:09:47,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:47,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267091009] [2019-12-27 15:09:47,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215978799] [2019-12-27 15:09:47,143 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:47,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:47,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:47,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:47,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:47,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:47,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [33005932] [2019-12-27 15:09:47,331 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:47,331 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:47,333 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:47,333 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:47,333 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:47,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:47,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:47,334 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,094 INFO L93 Difference]: Finished difference Result 283 states and 674 transitions. [2019-12-27 15:09:48,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:48,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,096 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:09:48,096 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:09:48,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:09:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2019-12-27 15:09:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:48,101 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,101 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:48,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,101 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,302 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 153 times [2019-12-27 15:09:48,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040906606] [2019-12-27 15:09:48,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040906606] [2019-12-27 15:09:48,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589085485] [2019-12-27 15:09:48,388 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:48,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:48,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:48,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319963778] [2019-12-27 15:09:48,584 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,585 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,587 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:48,587 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,587 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:48,588 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,764 INFO L93 Difference]: Finished difference Result 269 states and 642 transitions. [2019-12-27 15:09:48,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:48,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,765 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:09:48,766 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:09:48,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:48,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:09:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 214. [2019-12-27 15:09:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:48,770 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,771 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:48,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,771 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,974 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 154 times [2019-12-27 15:09:48,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148056446] [2019-12-27 15:09:48,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148056446] [2019-12-27 15:09:49,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297023342] [2019-12-27 15:09:49,095 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,138 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:49,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:49,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:49,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528298406] [2019-12-27 15:09:49,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,377 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,380 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,435 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:09:50,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,435 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:50,436 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:50,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=163, Invalid=342, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 217. [2019-12-27 15:09:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:50,439 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,440 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:50,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,440 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,641 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 155 times [2019-12-27 15:09:50,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291951478] [2019-12-27 15:09:50,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291951478] [2019-12-27 15:09:50,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098313324] [2019-12-27 15:09:50,744 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,788 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:50,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:53,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:53,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:53,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996308456] [2019-12-27 15:09:53,368 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:53,369 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:53,370 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:53,371 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:53,371 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:53,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:53,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:53,371 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:53,933 INFO L93 Difference]: Finished difference Result 286 states and 681 transitions. [2019-12-27 15:09:53,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:53,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:53,935 INFO L225 Difference]: With dead ends: 286 [2019-12-27 15:09:53,935 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 15:09:53,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 15:09:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 216. [2019-12-27 15:09:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:53,939 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:53,940 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:53,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:53,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:53,940 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,141 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 156 times [2019-12-27 15:09:54,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303222717] [2019-12-27 15:09:54,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303222717] [2019-12-27 15:09:54,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050389687] [2019-12-27 15:09:54,278 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,352 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:54,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:54,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:54,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:55,371 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_498 Int)) (and (<= (div (+ (* v_~i~0_498 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_498 2)) (<= c_~i~0 (+ v_~i~0_498 c_~j~0)))) is different from true [2019-12-27 15:09:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-27 15:09:55,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:55,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:55,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1824873694] [2019-12-27 15:09:55,972 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:55,973 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:55,975 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:55,975 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:55,976 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:55,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:55,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=186, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:09:55,976 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:57,176 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2019-12-27 15:09:57,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:57,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:57,177 INFO L225 Difference]: With dead ends: 288 [2019-12-27 15:09:57,178 INFO L226 Difference]: Without dead ends: 287 [2019-12-27 15:09:57,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=306, Unknown=3, NotChecked=40, Total=506 [2019-12-27 15:09:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-27 15:09:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 217. [2019-12-27 15:09:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:57,182 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:57,182 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:57,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:57,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:57,183 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:57,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:57,384 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 157 times [2019-12-27 15:09:57,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:57,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125731959] [2019-12-27 15:09:57,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:57,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125731959] [2019-12-27 15:09:57,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329238884] [2019-12-27 15:09:57,478 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:57,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:57,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:58,128 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_502 Int)) (and (<= (div (+ (* v_~i~0_502 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~i~0_502 c_~j~0)) (<= c_~j~0 (+ v_~i~0_502 2)))) is different from true [2019-12-27 15:09:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 15:09:59,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:59,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:59,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [452765607] [2019-12-27 15:09:59,136 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:59,136 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:59,138 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:59,138 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:59,138 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:59,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:59,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=187, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:09:59,139 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:59,350 INFO L93 Difference]: Finished difference Result 278 states and 663 transitions. [2019-12-27 15:09:59,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:59,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:59,351 INFO L225 Difference]: With dead ends: 278 [2019-12-27 15:09:59,351 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 15:09:59,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=306, Unknown=1, NotChecked=40, Total=506 [2019-12-27 15:09:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 15:09:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 215. [2019-12-27 15:09:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:59,356 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:59,357 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:59,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:59,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:59,358 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:59,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:59,561 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 158 times [2019-12-27 15:09:59,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:59,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460672602] [2019-12-27 15:09:59,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:59,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460672602] [2019-12-27 15:09:59,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96973415] [2019-12-27 15:09:59,656 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:59,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:59,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:59,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:59,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:59,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:59,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:59,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [366064881] [2019-12-27 15:09:59,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:59,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:59,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:59,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:59,852 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:59,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:59,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:59,852 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:10:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:00,058 INFO L93 Difference]: Finished difference Result 292 states and 698 transitions. [2019-12-27 15:10:00,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:00,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:00,059 INFO L225 Difference]: With dead ends: 292 [2019-12-27 15:10:00,060 INFO L226 Difference]: Without dead ends: 291 [2019-12-27 15:10:00,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-27 15:10:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 217. [2019-12-27 15:10:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:00,065 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:00,065 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:00,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:00,065 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:00,065 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:00,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:00,266 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:00,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 159 times [2019-12-27 15:10:00,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:00,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534469342] [2019-12-27 15:10:00,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:00,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534469342] [2019-12-27 15:10:00,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008821712] [2019-12-27 15:10:00,356 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:00,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:00,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:00,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:10:00,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:00,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:00,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:00,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [280488564] [2019-12-27 15:10:00,568 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:00,568 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:00,570 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:00,570 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:00,570 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:00,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:00,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:00,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:00,571 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:00,834 INFO L93 Difference]: Finished difference Result 277 states and 658 transitions. [2019-12-27 15:10:00,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:00,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:00,835 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:10:00,836 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:10:00,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:10:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 216. [2019-12-27 15:10:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:10:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:10:00,840 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:10:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:00,840 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:10:00,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:10:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:00,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:00,841 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:01,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,042 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789551, now seen corresponding path program 160 times [2019-12-27 15:10:01,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:01,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126678424] [2019-12-27 15:10:01,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126678424] [2019-12-27 15:10:01,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257712770] [2019-12-27 15:10:01,138 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:01,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:01,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:01,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:01,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:01,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809754502] [2019-12-27 15:10:01,402 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:01,402 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:01,404 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:01,404 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:01,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:01,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:01,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:01,405 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:10:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:01,615 INFO L93 Difference]: Finished difference Result 283 states and 678 transitions. [2019-12-27 15:10:01,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:01,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:01,617 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:10:01,617 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:10:01,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:10:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2019-12-27 15:10:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:01,620 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:01,621 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:01,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:01,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:01,621 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:01,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,825 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789706, now seen corresponding path program 161 times [2019-12-27 15:10:01,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:01,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930472014] [2019-12-27 15:10:01,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930472014] [2019-12-27 15:10:01,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635317441] [2019-12-27 15:10:01,911 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,955 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:01,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:01,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:01,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:02,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:02,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [138429029] [2019-12-27 15:10:02,089 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:02,090 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:02,093 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:02,094 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:02,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:02,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:02,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:02,095 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,273 INFO L93 Difference]: Finished difference Result 261 states and 626 transitions. [2019-12-27 15:10:02,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,274 INFO L225 Difference]: With dead ends: 261 [2019-12-27 15:10:02,274 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 15:10:02,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 15:10:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2019-12-27 15:10:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:10:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:10:02,278 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:10:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,278 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:10:02,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:10:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,279 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,279 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:02,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,480 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 162 times [2019-12-27 15:10:02,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:02,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30381351] [2019-12-27 15:10:02,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30381351] [2019-12-27 15:10:02,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963729045] [2019-12-27 15:10:02,588 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:02,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:02,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:02,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:02,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:02,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1915489060] [2019-12-27 15:10:02,748 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:02,748 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:02,751 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:02,751 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:02,751 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:02,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:02,752 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:10:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,923 INFO L93 Difference]: Finished difference Result 268 states and 637 transitions. [2019-12-27 15:10:02,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,924 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:10:02,925 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:10:02,925 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:02,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:10:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 218. [2019-12-27 15:10:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:02,929 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,929 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:02,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,930 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,930 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,131 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 163 times [2019-12-27 15:10:03,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605952843] [2019-12-27 15:10:03,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605952843] [2019-12-27 15:10:03,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345417693] [2019-12-27 15:10:03,246 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1297515263] [2019-12-27 15:10:03,492 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,493 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,495 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:03,495 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,496 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:03,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,497 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:03,741 INFO L93 Difference]: Finished difference Result 287 states and 691 transitions. [2019-12-27 15:10:03,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:03,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:03,742 INFO L225 Difference]: With dead ends: 287 [2019-12-27 15:10:03,742 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 15:10:03,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 15:10:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 217. [2019-12-27 15:10:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:03,747 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:03,747 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:03,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:03,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:03,748 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,952 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168746, now seen corresponding path program 164 times [2019-12-27 15:10:03,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557387034] [2019-12-27 15:10:03,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557387034] [2019-12-27 15:10:04,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343154132] [2019-12-27 15:10:04,044 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:04,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:04,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:04,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:04,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:04,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2026018323] [2019-12-27 15:10:04,217 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:04,218 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:04,220 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:04,220 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:04,220 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:04,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:04,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:04,221 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,986 INFO L93 Difference]: Finished difference Result 279 states and 663 transitions. [2019-12-27 15:10:04,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:04,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,986 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:10:04,986 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:10:04,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=372, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:10:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2019-12-27 15:10:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:04,990 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,990 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:04,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:04,990 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,191 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 165 times [2019-12-27 15:10:05,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233073541] [2019-12-27 15:10:05,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233073541] [2019-12-27 15:10:05,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619292833] [2019-12-27 15:10:05,283 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:05,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:05,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:05,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:05,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1219031298] [2019-12-27 15:10:05,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:05,458 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:05,460 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:05,461 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:05,461 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:05,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:05,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:05,461 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:05,668 INFO L93 Difference]: Finished difference Result 291 states and 702 transitions. [2019-12-27 15:10:05,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:05,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:05,670 INFO L225 Difference]: With dead ends: 291 [2019-12-27 15:10:05,670 INFO L226 Difference]: Without dead ends: 290 [2019-12-27 15:10:05,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-12-27 15:10:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 216. [2019-12-27 15:10:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:10:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:10:05,674 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:10:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:05,674 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:10:05,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:10:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:05,675 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,675 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,876 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 166 times [2019-12-27 15:10:05,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50306194] [2019-12-27 15:10:05,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50306194] [2019-12-27 15:10:05,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654323702] [2019-12-27 15:10:05,990 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:06,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:06,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:06,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:06,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1779466525] [2019-12-27 15:10:06,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:06,213 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:06,215 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:06,215 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:06,216 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:06,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:06,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:06,216 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:10:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:06,459 INFO L93 Difference]: Finished difference Result 279 states and 662 transitions. [2019-12-27 15:10:06,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:06,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:06,460 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:10:06,460 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:10:06,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:10:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2019-12-27 15:10:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:06,465 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:06,465 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:06,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:06,466 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:06,466 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:06,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,669 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 167 times [2019-12-27 15:10:06,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:06,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154817152] [2019-12-27 15:10:06,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154817152] [2019-12-27 15:10:06,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766251774] [2019-12-27 15:10:06,762 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:06,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:06,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:06,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:06,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:06,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:06,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:06,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [90041437] [2019-12-27 15:10:06,916 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:06,916 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:06,918 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:06,918 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:06,918 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:06,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:06,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:06,921 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:07,111 INFO L93 Difference]: Finished difference Result 286 states and 685 transitions. [2019-12-27 15:10:07,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:07,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:07,112 INFO L225 Difference]: With dead ends: 286 [2019-12-27 15:10:07,112 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 15:10:07,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 15:10:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 217. [2019-12-27 15:10:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:07,117 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:07,117 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:07,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:07,118 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:07,118 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:07,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:07,321 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 168 times [2019-12-27 15:10:07,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:07,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265411085] [2019-12-27 15:10:07,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:07,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265411085] [2019-12-27 15:10:07,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438205676] [2019-12-27 15:10:07,416 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:07,458 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:07,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:07,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:07,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:07,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:07,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:07,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257471251] [2019-12-27 15:10:07,579 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:07,580 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:07,583 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:07,583 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:07,583 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:07,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:07,584 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:07,869 INFO L93 Difference]: Finished difference Result 283 states and 676 transitions. [2019-12-27 15:10:07,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:07,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:07,871 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:10:07,871 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:10:07,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:10:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 218. [2019-12-27 15:10:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:07,877 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:07,878 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:07,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:07,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:07,879 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:08,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,083 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:08,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317856, now seen corresponding path program 169 times [2019-12-27 15:10:08,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:08,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171288636] [2019-12-27 15:10:08,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:08,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171288636] [2019-12-27 15:10:08,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622473326] [2019-12-27 15:10:08,176 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:08,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:08,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:08,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:08,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1565287464] [2019-12-27 15:10:08,333 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:08,333 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:08,336 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:08,336 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:08,336 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:08,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:08,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:08,336 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:08,523 INFO L93 Difference]: Finished difference Result 273 states and 657 transitions. [2019-12-27 15:10:08,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:08,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:08,524 INFO L225 Difference]: With dead ends: 273 [2019-12-27 15:10:08,524 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 15:10:08,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 15:10:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2019-12-27 15:10:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:10:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:10:08,533 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:10:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:08,534 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:10:08,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:10:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:08,534 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:08,534 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:08,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,738 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:08,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781546, now seen corresponding path program 170 times [2019-12-27 15:10:08,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:08,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792412274] [2019-12-27 15:10:08,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:08,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792412274] [2019-12-27 15:10:08,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419322604] [2019-12-27 15:10:08,833 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:08,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:08,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:08,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:08,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:08,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:08,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157829941] [2019-12-27 15:10:08,997 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:08,998 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:09,000 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:09,000 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:09,001 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:09,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:09,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:09,001 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:10:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:09,177 INFO L93 Difference]: Finished difference Result 282 states and 668 transitions. [2019-12-27 15:10:09,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:09,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:09,178 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:10:09,178 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:10:09,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:10:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2019-12-27 15:10:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:09,183 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:09,183 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:09,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:09,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:09,183 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:09,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:09,384 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 171 times [2019-12-27 15:10:09,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:09,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878905149] [2019-12-27 15:10:09,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:09,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878905149] [2019-12-27 15:10:09,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142900507] [2019-12-27 15:10:09,475 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:09,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:09,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:09,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:10:09,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:09,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:09,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:09,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [769081566] [2019-12-27 15:10:09,633 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:09,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:09,636 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:09,636 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:09,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:09,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:09,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:09,637 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:09,863 INFO L93 Difference]: Finished difference Result 292 states and 700 transitions. [2019-12-27 15:10:09,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:09,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:09,864 INFO L225 Difference]: With dead ends: 292 [2019-12-27 15:10:09,864 INFO L226 Difference]: Without dead ends: 291 [2019-12-27 15:10:09,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-27 15:10:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 217. [2019-12-27 15:10:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:09,869 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:09,869 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:09,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:09,870 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:09,870 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:10,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,070 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786351, now seen corresponding path program 172 times [2019-12-27 15:10:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:10,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285390082] [2019-12-27 15:10:10,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:10,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285390082] [2019-12-27 15:10:10,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708230540] [2019-12-27 15:10:10,162 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:10,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:10,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:10,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:10,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:10,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:10,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1981809710] [2019-12-27 15:10:10,793 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:10,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:10,795 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:10,795 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:10,795 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:10,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:10,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:10,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:10,796 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:11,026 INFO L93 Difference]: Finished difference Result 282 states and 672 transitions. [2019-12-27 15:10:11,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:11,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:11,027 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:10:11,027 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:10:11,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:10:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2019-12-27 15:10:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:11,032 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:11,032 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:11,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:11,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:11,032 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:11,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:11,233 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786506, now seen corresponding path program 173 times [2019-12-27 15:10:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:11,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069780497] [2019-12-27 15:10:11,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:11,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069780497] [2019-12-27 15:10:11,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304721651] [2019-12-27 15:10:11,363 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:11,429 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:11,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:11,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:11,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:12,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:12,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:12,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [823717270] [2019-12-27 15:10:12,435 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:12,436 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:12,438 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:12,438 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:12,438 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:12,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:12,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:12,439 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:12,932 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:10:12,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:12,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:12,934 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:10:12,934 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:10:12,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:10:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 216. [2019-12-27 15:10:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:10:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:10:12,938 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:10:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:12,938 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:10:12,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:10:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:12,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:12,939 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:13,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,140 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930501, now seen corresponding path program 174 times [2019-12-27 15:10:13,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:13,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893512331] [2019-12-27 15:10:13,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:13,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893512331] [2019-12-27 15:10:13,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184806430] [2019-12-27 15:10:13,223 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,265 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:13,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:13,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:13,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:13,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:13,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:13,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1175567766] [2019-12-27 15:10:13,375 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:13,376 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:13,378 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:13,378 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:13,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:13,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:13,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:13,379 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:10:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:13,577 INFO L93 Difference]: Finished difference Result 280 states and 665 transitions. [2019-12-27 15:10:13,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:13,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:13,578 INFO L225 Difference]: With dead ends: 280 [2019-12-27 15:10:13,578 INFO L226 Difference]: Without dead ends: 279 [2019-12-27 15:10:13,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-12-27 15:10:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 218. [2019-12-27 15:10:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:13,583 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:13,583 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:13,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:13,583 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:13,583 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:13,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,784 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930656, now seen corresponding path program 175 times [2019-12-27 15:10:13,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:13,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039223665] [2019-12-27 15:10:13,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:13,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039223665] [2019-12-27 15:10:13,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842710737] [2019-12-27 15:10:13,875 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:13,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:13,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:14,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:14,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:14,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1415382103] [2019-12-27 15:10:14,969 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:14,970 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:14,972 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:14,972 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:14,972 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:14,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:14,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=209, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:14,972 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:15,431 INFO L93 Difference]: Finished difference Result 277 states and 661 transitions. [2019-12-27 15:10:15,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:15,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:15,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:15,432 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:10:15,432 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:10:15,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=334, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:10:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:10:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2019-12-27 15:10:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:15,436 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:15,436 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:15,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:15,437 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:15,437 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:15,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:15,638 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935306, now seen corresponding path program 176 times [2019-12-27 15:10:15,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:15,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346156631] [2019-12-27 15:10:15,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:15,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346156631] [2019-12-27 15:10:15,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427803844] [2019-12-27 15:10:15,726 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:15,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:15,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:15,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:15,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:15,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:15,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:15,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1121273571] [2019-12-27 15:10:15,891 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:15,891 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:15,893 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:15,893 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:15,894 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:15,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:15,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:15,894 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:16,089 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2019-12-27 15:10:16,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:16,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:16,090 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:16,091 INFO L226 Difference]: Without dead ends: 261 [2019-12-27 15:10:16,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-12-27 15:10:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 218. [2019-12-27 15:10:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:16,095 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:16,095 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:16,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:16,096 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:16,096 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:16,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:16,299 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 177 times [2019-12-27 15:10:16,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:16,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115533324] [2019-12-27 15:10:16,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:16,383 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 15:10:16,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115533324] [2019-12-27 15:10:16,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159356103] [2019-12-27 15:10:16,384 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:16,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:16,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:16,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:16,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:16,562 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 15:10:16,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:16,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:16,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [932427991] [2019-12-27 15:10:16,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:16,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:16,565 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:16,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:16,566 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:16,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:16,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:16,566 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:16,731 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-27 15:10:16,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:16,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:16,733 INFO L225 Difference]: With dead ends: 237 [2019-12-27 15:10:16,733 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 15:10:16,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 15:10:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-27 15:10:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:10:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-27 15:10:16,738 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-27 15:10:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:16,738 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-27 15:10:16,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-27 15:10:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:16,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:16,739 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:16,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:16,941 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:16,942 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 178 times [2019-12-27 15:10:16,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:16,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377647117] [2019-12-27 15:10:16,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:17,051 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 15:10:17,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377647117] [2019-12-27 15:10:17,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017274605] [2019-12-27 15:10:17,051 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:17,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:17,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:17,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:17,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:17,342 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 15:10:17,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:17,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:17,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [570988563] [2019-12-27 15:10:17,343 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:17,345 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:17,351 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 56 transitions. [2019-12-27 15:10:17,351 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:17,356 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 15:10:17,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:17,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:17,357 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 10 states. [2019-12-27 15:10:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:17,684 INFO L93 Difference]: Finished difference Result 235 states and 574 transitions. [2019-12-27 15:10:17,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:17,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:17,685 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:10:17,685 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 15:10:17,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 15:10:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2019-12-27 15:10:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:17,690 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:17,691 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:17,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:17,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:17,691 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:17,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:17,895 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 179 times [2019-12-27 15:10:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:17,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124488363] [2019-12-27 15:10:17,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:18,043 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 15:10:18,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124488363] [2019-12-27 15:10:18,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506308931] [2019-12-27 15:10:18,044 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:18,144 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:18,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:18,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:18,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:19,954 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 15:10:19,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:19,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:19,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1570266957] [2019-12-27 15:10:19,955 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:19,956 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:19,958 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:19,958 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:19,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:19,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:19,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:19,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=224, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:19,964 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:21,201 INFO L93 Difference]: Finished difference Result 249 states and 603 transitions. [2019-12-27 15:10:21,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:21,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:21,202 INFO L225 Difference]: With dead ends: 249 [2019-12-27 15:10:21,202 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 15:10:21,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=167, Invalid=382, Unknown=3, NotChecked=0, Total=552 [2019-12-27 15:10:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 15:10:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 211. [2019-12-27 15:10:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:21,207 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:21,207 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:21,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:21,207 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:21,208 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:21,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:21,411 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 180 times [2019-12-27 15:10:21,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:21,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189857779] [2019-12-27 15:10:21,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:21,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189857779] [2019-12-27 15:10:21,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097748393] [2019-12-27 15:10:21,503 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:21,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:21,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:21,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:21,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:21,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:21,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:21,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926401594] [2019-12-27 15:10:21,675 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:21,676 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:21,678 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:21,678 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:21,680 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:21,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:21,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:21,681 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:10:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:21,909 INFO L93 Difference]: Finished difference Result 248 states and 602 transitions. [2019-12-27 15:10:21,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:21,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:21,910 INFO L225 Difference]: With dead ends: 248 [2019-12-27 15:10:21,910 INFO L226 Difference]: Without dead ends: 247 [2019-12-27 15:10:21,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-27 15:10:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2019-12-27 15:10:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:21,915 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:21,915 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:21,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:21,916 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:21,916 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:22,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:22,117 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 181 times [2019-12-27 15:10:22,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:22,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253037163] [2019-12-27 15:10:22,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:22,206 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 15:10:22,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253037163] [2019-12-27 15:10:22,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943297202] [2019-12-27 15:10:22,207 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:22,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:22,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:23,285 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 15:10:23,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:23,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:23,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723794184] [2019-12-27 15:10:23,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:23,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:23,289 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:23,289 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:23,291 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:23,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:23,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:23,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:23,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=222, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:23,291 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:24,126 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2019-12-27 15:10:24,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:24,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:24,127 INFO L225 Difference]: With dead ends: 256 [2019-12-27 15:10:24,128 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 15:10:24,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=169, Invalid=380, Unknown=3, NotChecked=0, Total=552 [2019-12-27 15:10:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 15:10:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 212. [2019-12-27 15:10:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:10:24,132 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:10:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:24,132 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:10:24,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:10:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:24,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:24,133 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:24,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:24,334 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 182 times [2019-12-27 15:10:24,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:24,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919798052] [2019-12-27 15:10:24,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:24,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919798052] [2019-12-27 15:10:24,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375696472] [2019-12-27 15:10:24,428 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:24,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:24,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:24,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:24,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:25,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:25,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:25,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [465610676] [2019-12-27 15:10:25,100 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:25,101 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:25,104 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:25,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:25,108 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:25,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:25,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:25,109 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:10:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:25,628 INFO L93 Difference]: Finished difference Result 255 states and 614 transitions. [2019-12-27 15:10:25,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:25,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:25,630 INFO L225 Difference]: With dead ends: 255 [2019-12-27 15:10:25,630 INFO L226 Difference]: Without dead ends: 254 [2019-12-27 15:10:25,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-27 15:10:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 211. [2019-12-27 15:10:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:25,634 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:25,634 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:25,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:25,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:25,635 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:25,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,835 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 183 times [2019-12-27 15:10:25,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:25,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770235256] [2019-12-27 15:10:25,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:25,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770235256] [2019-12-27 15:10:25,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293079349] [2019-12-27 15:10:25,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:25,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:25,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:25,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:26,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:26,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:26,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1388516696] [2019-12-27 15:10:26,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:26,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:26,126 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:26,126 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:26,127 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:26,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:26,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:26,128 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:10:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:26,887 INFO L93 Difference]: Finished difference Result 265 states and 635 transitions. [2019-12-27 15:10:26,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:26,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:26,889 INFO L225 Difference]: With dead ends: 265 [2019-12-27 15:10:26,889 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 15:10:26,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=382, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 15:10:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2019-12-27 15:10:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:10:26,893 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:10:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:26,893 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:10:26,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:10:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:26,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:26,893 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:27,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:27,094 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash -591352520, now seen corresponding path program 184 times [2019-12-27 15:10:27,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:27,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432337092] [2019-12-27 15:10:27,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:27,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432337092] [2019-12-27 15:10:27,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903187307] [2019-12-27 15:10:27,190 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:27,233 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:27,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:27,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:27,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:27,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:27,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:27,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440694964] [2019-12-27 15:10:27,371 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:27,372 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:27,375 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:27,376 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:27,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:27,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:27,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:27,378 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:10:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:27,603 INFO L93 Difference]: Finished difference Result 250 states and 603 transitions. [2019-12-27 15:10:27,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:27,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:27,605 INFO L225 Difference]: With dead ends: 250 [2019-12-27 15:10:27,605 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:27,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2019-12-27 15:10:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:27,609 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:27,609 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:27,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:27,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:27,610 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:27,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:27,811 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 185 times [2019-12-27 15:10:27,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:27,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586546999] [2019-12-27 15:10:27,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:27,898 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 15:10:27,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586546999] [2019-12-27 15:10:27,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84950126] [2019-12-27 15:10:27,898 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:27,942 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:27,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:27,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:27,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:28,551 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 15:10:28,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:28,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:28,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1783342312] [2019-12-27 15:10:28,552 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:28,552 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:28,555 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:28,556 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:28,557 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:28,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:28,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:28,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:28,558 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:29,411 INFO L93 Difference]: Finished difference Result 262 states and 624 transitions. [2019-12-27 15:10:29,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:29,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:29,412 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:29,412 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 15:10:29,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=382, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 15:10:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 213. [2019-12-27 15:10:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-27 15:10:29,417 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-27 15:10:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:29,417 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-27 15:10:29,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-27 15:10:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:29,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:29,418 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:29,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:29,619 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 186 times [2019-12-27 15:10:29,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:29,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974791923] [2019-12-27 15:10:29,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:29,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974791923] [2019-12-27 15:10:29,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605104864] [2019-12-27 15:10:29,706 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:29,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:29,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:29,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:29,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:30,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:30,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:30,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [655759783] [2019-12-27 15:10:30,967 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:30,968 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:30,970 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:30,970 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:30,971 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:30,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:30,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:30,972 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 10 states. [2019-12-27 15:10:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:37,479 INFO L93 Difference]: Finished difference Result 262 states and 629 transitions. [2019-12-27 15:10:37,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:10:37,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:37,480 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:37,480 INFO L226 Difference]: Without dead ends: 261 [2019-12-27 15:10:37,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=200, Invalid=447, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:10:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-12-27 15:10:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 212. [2019-12-27 15:10:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:10:37,485 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:10:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:37,485 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:10:37,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:10:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:37,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:37,486 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:37,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:37,686 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 187 times [2019-12-27 15:10:37,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:37,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108618023] [2019-12-27 15:10:37,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:37,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108618023] [2019-12-27 15:10:37,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949391458] [2019-12-27 15:10:37,778 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:37,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:37,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:39,083 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_614 Int)) (and (<= c_~j~0 (+ (* 3 v_~i~0_614) 2)) (<= c_~i~0 (+ c_~j~0 (* 2 v_~i~0_614) 1)) (<= (div (+ (* v_~i~0_614 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 15:10:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:39,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:39,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:39,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [219309092] [2019-12-27 15:10:39,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:39,085 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:39,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:39,088 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:39,089 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:39,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:39,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:39,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=193, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:10:39,090 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:10:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:40,466 INFO L93 Difference]: Finished difference Result 270 states and 646 transitions. [2019-12-27 15:10:40,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:40,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:40,466 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:10:40,467 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:10:40,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=4, NotChecked=42, Total=552 [2019-12-27 15:10:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:10:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2019-12-27 15:10:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 540 transitions. [2019-12-27 15:10:40,470 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 540 transitions. Word has length 14 [2019-12-27 15:10:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:40,470 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 540 transitions. [2019-12-27 15:10:40,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 540 transitions. [2019-12-27 15:10:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:40,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:40,471 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:40,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:40,671 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 188 times [2019-12-27 15:10:40,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:40,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171175390] [2019-12-27 15:10:40,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:40,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171175390] [2019-12-27 15:10:40,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12454443] [2019-12-27 15:10:40,773 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:40,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:40,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:40,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:40,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:41,949 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:42,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:42,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:42,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2060353258] [2019-12-27 15:10:42,001 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:42,002 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:42,005 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:42,005 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:42,006 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:42,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:42,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:42,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:42,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:42,007 INFO L87 Difference]: Start difference. First operand 213 states and 540 transitions. Second operand 10 states. [2019-12-27 15:10:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:46,300 INFO L93 Difference]: Finished difference Result 260 states and 624 transitions. [2019-12-27 15:10:46,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:46,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:46,301 INFO L225 Difference]: With dead ends: 260 [2019-12-27 15:10:46,301 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 15:10:46,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=167, Invalid=378, Unknown=7, NotChecked=0, Total=552 [2019-12-27 15:10:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 15:10:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2019-12-27 15:10:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:46,306 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:46,306 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:46,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:46,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:46,307 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:46,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:46,508 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash -595965165, now seen corresponding path program 189 times [2019-12-27 15:10:46,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:46,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039419203] [2019-12-27 15:10:46,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:46,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039419203] [2019-12-27 15:10:46,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952381122] [2019-12-27 15:10:46,597 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:46,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:46,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:46,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:46,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:46,916 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:46,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:46,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:46,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [124691378] [2019-12-27 15:10:46,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:46,942 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:46,945 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:46,945 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:46,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:46,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:46,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:46,947 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:10:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:47,708 INFO L93 Difference]: Finished difference Result 278 states and 662 transitions. [2019-12-27 15:10:47,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:47,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:47,709 INFO L225 Difference]: With dead ends: 278 [2019-12-27 15:10:47,709 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 15:10:47,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=381, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 15:10:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 213. [2019-12-27 15:10:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:10:47,719 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:10:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:47,719 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:10:47,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:10:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:47,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:47,719 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:47,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:47,920 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 190 times [2019-12-27 15:10:47,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:47,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046015288] [2019-12-27 15:10:47,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:48,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046015288] [2019-12-27 15:10:48,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416484507] [2019-12-27 15:10:48,012 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:48,058 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:48,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:48,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:48,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:48,612 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_628 Int)) (and (<= (div (+ (* v_~i~0_628 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ c_~i~0 (* 2 v_~i~0_628) 1)) (<= c_~i~0 (+ (* 3 v_~i~0_628) 1)))) is different from true [2019-12-27 15:10:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:48,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:48,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:48,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1287736247] [2019-12-27 15:10:48,614 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:48,614 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:48,617 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:48,617 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:48,618 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:48,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:48,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:48,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=195, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:10:48,619 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:10:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:49,420 INFO L93 Difference]: Finished difference Result 270 states and 640 transitions. [2019-12-27 15:10:49,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:49,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:49,428 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:10:49,428 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:10:49,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=376, Unknown=2, NotChecked=44, Total=600 [2019-12-27 15:10:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:10:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2019-12-27 15:10:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:10:49,431 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:10:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:49,431 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:10:49,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:10:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:49,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:49,432 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:49,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:49,633 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 191 times [2019-12-27 15:10:49,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:49,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509969693] [2019-12-27 15:10:49,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:49,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509969693] [2019-12-27 15:10:49,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640114072] [2019-12-27 15:10:49,758 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:49,800 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:49,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:49,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:49,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:49,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:49,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:49,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2066645996] [2019-12-27 15:10:49,941 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:49,942 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:49,944 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:49,944 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:49,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:49,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:49,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:49,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:49,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:49,947 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:10:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:50,222 INFO L93 Difference]: Finished difference Result 274 states and 654 transitions. [2019-12-27 15:10:50,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:50,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:50,223 INFO L225 Difference]: With dead ends: 274 [2019-12-27 15:10:50,224 INFO L226 Difference]: Without dead ends: 273 [2019-12-27 15:10:50,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-12-27 15:10:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2019-12-27 15:10:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:10:50,227 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:10:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:50,228 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:10:50,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:10:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:50,228 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:50,228 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:50,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:50,429 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash -595970125, now seen corresponding path program 192 times [2019-12-27 15:10:50,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:50,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413822773] [2019-12-27 15:10:50,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:50,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413822773] [2019-12-27 15:10:50,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547923526] [2019-12-27 15:10:50,518 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:50,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:50,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:50,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:50,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:50,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:50,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:50,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336350455] [2019-12-27 15:10:50,706 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:50,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:50,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:50,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:50,710 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:50,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:50,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:50,711 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:10:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:50,926 INFO L93 Difference]: Finished difference Result 250 states and 602 transitions. [2019-12-27 15:10:50,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:50,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:50,927 INFO L225 Difference]: With dead ends: 250 [2019-12-27 15:10:50,927 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:50,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2019-12-27 15:10:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:50,930 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:50,930 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:50,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:50,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:50,931 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:51,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:51,132 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -734344360, now seen corresponding path program 193 times [2019-12-27 15:10:51,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:51,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517412351] [2019-12-27 15:10:51,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:51,217 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 15:10:51,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517412351] [2019-12-27 15:10:51,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161311505] [2019-12-27 15:10:51,218 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:51,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:51,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:51,409 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 15:10:51,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:51,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:51,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118152811] [2019-12-27 15:10:51,410 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:51,411 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:51,413 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:51,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:51,414 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:51,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:51,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:51,415 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:51,701 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2019-12-27 15:10:51,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:51,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:51,708 INFO L225 Difference]: With dead ends: 255 [2019-12-27 15:10:51,708 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:51,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 214. [2019-12-27 15:10:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:10:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 542 transitions. [2019-12-27 15:10:51,710 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 542 transitions. Word has length 14 [2019-12-27 15:10:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:51,710 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 542 transitions. [2019-12-27 15:10:51,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 542 transitions. [2019-12-27 15:10:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:51,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:51,711 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:51,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:51,912 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 194 times [2019-12-27 15:10:51,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:51,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449665065] [2019-12-27 15:10:51,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:52,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449665065] [2019-12-27 15:10:52,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434008565] [2019-12-27 15:10:52,003 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:52,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:52,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:52,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:52,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:56,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:56,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:56,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1669776933] [2019-12-27 15:10:56,284 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:56,285 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:56,287 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:56,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:56,288 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:56,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:56,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:56,289 INFO L87 Difference]: Start difference. First operand 214 states and 542 transitions. Second operand 10 states. [2019-12-27 15:11:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:00,707 INFO L93 Difference]: Finished difference Result 266 states and 633 transitions. [2019-12-27 15:11:00,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:00,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:00,709 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:11:00,709 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:11:00,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=185, Invalid=413, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:11:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:11:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 213. [2019-12-27 15:11:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-27 15:11:00,713 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-27 15:11:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:00,713 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-27 15:11:00,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-27 15:11:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:00,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:00,714 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:00,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,914 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 195 times [2019-12-27 15:11:00,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:00,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497922776] [2019-12-27 15:11:00,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:01,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497922776] [2019-12-27 15:11:01,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980071767] [2019-12-27 15:11:01,010 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:01,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:01,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:01,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:01,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:05,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:05,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:05,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1645922425] [2019-12-27 15:11:05,380 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:05,381 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:05,383 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:05,383 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:05,384 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:05,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:05,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:05,385 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 10 states. [2019-12-27 15:11:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:09,931 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2019-12-27 15:11:09,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:09,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:09,932 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:11:09,932 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:11:09,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=201, Invalid=447, Unknown=2, NotChecked=0, Total=650 [2019-12-27 15:11:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:11:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 214. [2019-12-27 15:11:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 543 transitions. [2019-12-27 15:11:09,936 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 543 transitions. Word has length 14 [2019-12-27 15:11:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:09,936 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 543 transitions. [2019-12-27 15:11:09,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 543 transitions. [2019-12-27 15:11:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:09,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:09,937 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:10,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:10,138 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 196 times [2019-12-27 15:11:10,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:10,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897329737] [2019-12-27 15:11:10,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:10,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897329737] [2019-12-27 15:11:10,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653298792] [2019-12-27 15:11:10,299 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:10,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:10,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:10,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:10,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:16,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:16,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:16,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [963734595] [2019-12-27 15:11:16,805 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:16,806 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:16,808 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:16,809 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:16,809 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:16,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:16,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:16,810 INFO L87 Difference]: Start difference. First operand 214 states and 543 transitions. Second operand 10 states. [2019-12-27 15:11:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:19,294 INFO L93 Difference]: Finished difference Result 271 states and 644 transitions. [2019-12-27 15:11:19,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:19,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:19,295 INFO L225 Difference]: With dead ends: 271 [2019-12-27 15:11:19,295 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 15:11:19,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=186, Invalid=413, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:11:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 15:11:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 212. [2019-12-27 15:11:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:11:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:11:19,299 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:11:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:19,300 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:11:19,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:11:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:19,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:19,300 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:19,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:19,504 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash -734493315, now seen corresponding path program 197 times [2019-12-27 15:11:19,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:19,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797771888] [2019-12-27 15:11:19,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:19,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797771888] [2019-12-27 15:11:19,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297061534] [2019-12-27 15:11:19,595 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:19,644 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:19,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:19,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:19,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:19,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:19,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:19,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1771607498] [2019-12-27 15:11:19,832 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:19,833 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:19,835 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:19,835 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:19,837 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:19,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:19,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:19,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:19,838 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:11:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:20,164 INFO L93 Difference]: Finished difference Result 265 states and 630 transitions. [2019-12-27 15:11:20,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:20,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:20,166 INFO L225 Difference]: With dead ends: 265 [2019-12-27 15:11:20,166 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 15:11:20,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 15:11:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 214. [2019-12-27 15:11:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 544 transitions. [2019-12-27 15:11:20,170 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 544 transitions. Word has length 14 [2019-12-27 15:11:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:20,170 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 544 transitions. [2019-12-27 15:11:20,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 544 transitions. [2019-12-27 15:11:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:20,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:20,171 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:20,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:20,371 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash -734493470, now seen corresponding path program 198 times [2019-12-27 15:11:20,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:20,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822536838] [2019-12-27 15:11:20,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:20,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822536838] [2019-12-27 15:11:20,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831453372] [2019-12-27 15:11:20,481 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:20,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:20,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:20,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:20,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:20,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:20,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1277257868] [2019-12-27 15:11:20,728 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:20,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:20,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:20,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:20,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:20,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:20,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:20,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:20,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:20,733 INFO L87 Difference]: Start difference. First operand 214 states and 544 transitions. Second operand 10 states. [2019-12-27 15:11:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:21,073 INFO L93 Difference]: Finished difference Result 266 states and 635 transitions. [2019-12-27 15:11:21,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:21,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:21,074 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:11:21,074 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:11:21,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:11:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 213. [2019-12-27 15:11:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 540 transitions. [2019-12-27 15:11:21,078 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 540 transitions. Word has length 14 [2019-12-27 15:11:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:21,079 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 540 transitions. [2019-12-27 15:11:21,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 540 transitions. [2019-12-27 15:11:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:21,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:21,079 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:21,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,280 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -734498120, now seen corresponding path program 199 times [2019-12-27 15:11:21,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:21,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784123814] [2019-12-27 15:11:21,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:21,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784123814] [2019-12-27 15:11:21,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103139517] [2019-12-27 15:11:21,381 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:21,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:21,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:21,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:21,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:21,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [587959579] [2019-12-27 15:11:21,707 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:21,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:21,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:21,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:21,718 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:21,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:21,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:21,719 INFO L87 Difference]: Start difference. First operand 213 states and 540 transitions. Second operand 10 states. [2019-12-27 15:11:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:28,120 INFO L93 Difference]: Finished difference Result 271 states and 642 transitions. [2019-12-27 15:11:28,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:28,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:28,121 INFO L225 Difference]: With dead ends: 271 [2019-12-27 15:11:28,121 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 15:11:28,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=186, Invalid=411, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 15:11:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2019-12-27 15:11:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 544 transitions. [2019-12-27 15:11:28,126 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 544 transitions. Word has length 14 [2019-12-27 15:11:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:28,126 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 544 transitions. [2019-12-27 15:11:28,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 544 transitions. [2019-12-27 15:11:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:28,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:28,126 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:28,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:28,327 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 200 times [2019-12-27 15:11:28,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:28,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067890377] [2019-12-27 15:11:28,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:28,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067890377] [2019-12-27 15:11:28,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858231432] [2019-12-27 15:11:28,417 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:28,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:28,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:28,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:28,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:29,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:29,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1704923101] [2019-12-27 15:11:29,249 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:29,250 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:29,253 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:29,253 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:29,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:29,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:29,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:29,255 INFO L87 Difference]: Start difference. First operand 214 states and 544 transitions. Second operand 10 states. [2019-12-27 15:11:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:29,656 INFO L93 Difference]: Finished difference Result 256 states and 611 transitions. [2019-12-27 15:11:29,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:29,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:29,657 INFO L225 Difference]: With dead ends: 256 [2019-12-27 15:11:29,657 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 15:11:29,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=413, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:11:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 15:11:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 211. [2019-12-27 15:11:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:11:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:11:29,667 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:11:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:29,667 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:11:29,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:11:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:29,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:29,668 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:29,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:29,869 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash -738961965, now seen corresponding path program 201 times [2019-12-27 15:11:29,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:29,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814611105] [2019-12-27 15:11:29,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814611105] [2019-12-27 15:11:29,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825701938] [2019-12-27 15:11:29,957 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:30,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:30,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:30,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:30,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:30,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372804993] [2019-12-27 15:11:30,171 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:30,172 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:30,174 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:30,174 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:30,175 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:30,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:30,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:30,176 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:11:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:30,453 INFO L93 Difference]: Finished difference Result 269 states and 637 transitions. [2019-12-27 15:11:30,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:30,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:30,454 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:11:30,454 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:11:30,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:11:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 214. [2019-12-27 15:11:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:30,459 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:30,459 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:30,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:30,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:30,460 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:30,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,660 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash -738962120, now seen corresponding path program 202 times [2019-12-27 15:11:30,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:30,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521758446] [2019-12-27 15:11:30,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521758446] [2019-12-27 15:11:30,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14869011] [2019-12-27 15:11:30,753 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:30,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:30,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:30,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:33,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:33,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:33,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [939179983] [2019-12-27 15:11:33,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:33,098 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:33,100 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:33,100 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:33,101 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:33,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:33,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:33,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:33,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:33,102 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,690 INFO L93 Difference]: Finished difference Result 281 states and 661 transitions. [2019-12-27 15:11:37,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:37,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,692 INFO L225 Difference]: With dead ends: 281 [2019-12-27 15:11:37,692 INFO L226 Difference]: Without dead ends: 280 [2019-12-27 15:11:37,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=201, Invalid=446, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:11:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-12-27 15:11:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 213. [2019-12-27 15:11:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:11:37,696 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:11:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,697 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:11:37,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:11:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,697 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,697 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:37,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,898 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash -738966770, now seen corresponding path program 203 times [2019-12-27 15:11:37,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:37,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747184080] [2019-12-27 15:11:37,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747184080] [2019-12-27 15:11:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512078287] [2019-12-27 15:11:37,999 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,044 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:38,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:38,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:38,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1795529350] [2019-12-27 15:11:38,224 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:38,224 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:38,226 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:38,226 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:38,227 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:38,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:38,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:38,228 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:11:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:38,625 INFO L93 Difference]: Finished difference Result 272 states and 641 transitions. [2019-12-27 15:11:38,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:38,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:38,626 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:11:38,626 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:11:38,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:11:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 214. [2019-12-27 15:11:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:38,631 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:38,631 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:38,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:38,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:38,632 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:38,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,832 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -738966925, now seen corresponding path program 204 times [2019-12-27 15:11:38,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:38,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334468091] [2019-12-27 15:11:38,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:38,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334468091] [2019-12-27 15:11:38,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255157557] [2019-12-27 15:11:38,925 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:38,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:38,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:39,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:39,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:39,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2062347144] [2019-12-27 15:11:39,189 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:39,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:39,192 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:39,192 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:39,193 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:39,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:39,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:39,194 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:39,584 INFO L93 Difference]: Finished difference Result 263 states and 622 transitions. [2019-12-27 15:11:39,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:39,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:39,585 INFO L225 Difference]: With dead ends: 263 [2019-12-27 15:11:39,585 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 15:11:39,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 15:11:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2019-12-27 15:11:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:11:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:11:39,590 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:11:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:39,590 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:11:39,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:11:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:39,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:39,591 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:39,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,791 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -739110920, now seen corresponding path program 205 times [2019-12-27 15:11:39,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:39,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453595213] [2019-12-27 15:11:39,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:39,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453595213] [2019-12-27 15:11:39,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389017174] [2019-12-27 15:11:39,895 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:39,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:39,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:40,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:40,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1515414066] [2019-12-27 15:11:40,088 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:40,089 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:40,091 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:40,092 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:40,093 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:40,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:40,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:40,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:40,093 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:11:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:40,367 INFO L93 Difference]: Finished difference Result 272 states and 644 transitions. [2019-12-27 15:11:40,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:40,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:40,368 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:11:40,369 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:11:40,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:11:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 214. [2019-12-27 15:11:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:40,373 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:40,373 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:40,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:40,374 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:40,374 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:40,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,575 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash -739111075, now seen corresponding path program 206 times [2019-12-27 15:11:40,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:40,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405825369] [2019-12-27 15:11:40,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405825369] [2019-12-27 15:11:40,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072538255] [2019-12-27 15:11:40,664 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:40,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:40,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:40,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:40,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:40,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1134386337] [2019-12-27 15:11:40,877 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:40,877 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:40,879 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:40,880 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:40,880 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:40,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:40,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:40,881 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:41,318 INFO L93 Difference]: Finished difference Result 264 states and 623 transitions. [2019-12-27 15:11:41,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:11:41,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:41,320 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:11:41,320 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:11:41,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:11:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:11:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 213. [2019-12-27 15:11:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:11:41,324 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:11:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:41,324 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:11:41,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:11:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:41,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:41,325 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:41,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,526 INFO L410 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:41,526 INFO L82 PathProgramCache]: Analyzing trace with hash -739115725, now seen corresponding path program 207 times [2019-12-27 15:11:41,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:41,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630439482] [2019-12-27 15:11:41,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630439482] [2019-12-27 15:11:41,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787467561] [2019-12-27 15:11:41,618 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:41,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:41,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:41,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:41,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:41,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [685819053] [2019-12-27 15:11:41,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:41,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:41,820 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:41,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:41,821 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:41,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:41,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:41,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:41,822 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:11:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,077 INFO L93 Difference]: Finished difference Result 261 states and 621 transitions. [2019-12-27 15:11:42,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,078 INFO L225 Difference]: With dead ends: 261 [2019-12-27 15:11:42,079 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 15:11:42,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 15:11:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2019-12-27 15:11:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:42,083 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,083 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:42,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,083 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,284 INFO L410 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -739115880, now seen corresponding path program 208 times [2019-12-27 15:11:42,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300871714] [2019-12-27 15:11:42,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300871714] [2019-12-27 15:11:42,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911699261] [2019-12-27 15:11:42,370 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,416 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:42,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:42,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:42,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:42,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:42,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1968464699] [2019-12-27 15:11:42,565 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:42,566 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:42,569 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:42,569 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:42,570 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:42,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:42,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:42,571 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,789 INFO L93 Difference]: Finished difference Result 239 states and 574 transitions. [2019-12-27 15:11:42,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,790 INFO L225 Difference]: With dead ends: 239 [2019-12-27 15:11:42,790 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 15:11:42,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 15:11:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 210. [2019-12-27 15:11:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:11:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:11:42,794 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:11:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,795 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:11:42,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:11:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,795 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,999 INFO L410 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -733749714, now seen corresponding path program 209 times [2019-12-27 15:11:43,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119264466] [2019-12-27 15:11:43,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,087 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 15:11:43,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119264466] [2019-12-27 15:11:43,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143572964] [2019-12-27 15:11:43,087 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,132 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:43,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,249 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 15:11:43,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1754339734] [2019-12-27 15:11:43,250 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,251 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,253 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:43,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:43,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,255 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:11:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,453 INFO L93 Difference]: Finished difference Result 246 states and 582 transitions. [2019-12-27 15:11:43,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:43,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,455 INFO L225 Difference]: With dead ends: 246 [2019-12-27 15:11:43,455 INFO L226 Difference]: Without dead ends: 239 [2019-12-27 15:11:43,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-27 15:11:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 206. [2019-12-27 15:11:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 513 transitions. [2019-12-27 15:11:43,459 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 513 transitions. Word has length 14 [2019-12-27 15:11:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,459 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 513 transitions. [2019-12-27 15:11:43,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 513 transitions. [2019-12-27 15:11:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,460 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,660 INFO L410 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash -733749869, now seen corresponding path program 210 times [2019-12-27 15:11:43,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716999601] [2019-12-27 15:11:43,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716999601] [2019-12-27 15:11:43,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635173747] [2019-12-27 15:11:43,786 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,831 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:43,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562175930] [2019-12-27 15:11:43,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,948 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,958 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:43,959 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,959 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:43,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,960 INFO L87 Difference]: Start difference. First operand 206 states and 513 transitions. Second operand 10 states. [2019-12-27 15:11:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:44,208 INFO L93 Difference]: Finished difference Result 266 states and 629 transitions. [2019-12-27 15:11:44,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:44,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:44,209 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:11:44,210 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:11:44,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:11:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 205. [2019-12-27 15:11:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:11:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 510 transitions. [2019-12-27 15:11:44,214 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 510 transitions. Word has length 14 [2019-12-27 15:11:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:44,214 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 510 transitions. [2019-12-27 15:11:44,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 510 transitions. [2019-12-27 15:11:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:44,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:44,215 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:44,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,415 INFO L410 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 211 times [2019-12-27 15:11:44,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:44,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115857071] [2019-12-27 15:11:44,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115857071] [2019-12-27 15:11:44,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661226069] [2019-12-27 15:11:44,508 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:45,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:45,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:45,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2142170619] [2019-12-27 15:11:45,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:45,097 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:45,099 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:45,099 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:45,100 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:45,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:45,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:45,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:45,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:45,101 INFO L87 Difference]: Start difference. First operand 205 states and 510 transitions. Second operand 10 states. [2019-12-27 15:11:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:46,849 INFO L93 Difference]: Finished difference Result 261 states and 614 transitions. [2019-12-27 15:11:46,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:46,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:46,850 INFO L225 Difference]: With dead ends: 261 [2019-12-27 15:11:46,850 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 15:11:46,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=192, Invalid=454, Unknown=4, NotChecked=0, Total=650 [2019-12-27 15:11:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 15:11:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 206. [2019-12-27 15:11:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2019-12-27 15:11:46,854 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 14 [2019-12-27 15:11:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:46,855 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2019-12-27 15:11:46,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2019-12-27 15:11:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:46,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:46,855 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,056 INFO L410 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -733754674, now seen corresponding path program 212 times [2019-12-27 15:11:47,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107121538] [2019-12-27 15:11:47,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107121538] [2019-12-27 15:11:47,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705794406] [2019-12-27 15:11:47,146 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:47,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:47,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:47,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:47,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:47,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1471736294] [2019-12-27 15:11:47,316 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:47,317 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:47,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:47,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:47,319 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:47,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:47,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:47,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:47,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:47,320 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand 10 states. [2019-12-27 15:11:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:47,565 INFO L93 Difference]: Finished difference Result 281 states and 660 transitions. [2019-12-27 15:11:47,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:47,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:47,567 INFO L225 Difference]: With dead ends: 281 [2019-12-27 15:11:47,567 INFO L226 Difference]: Without dead ends: 280 [2019-12-27 15:11:47,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:47,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-12-27 15:11:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 204. [2019-12-27 15:11:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:11:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 507 transitions. [2019-12-27 15:11:47,571 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 507 transitions. Word has length 14 [2019-12-27 15:11:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:47,572 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 507 transitions. [2019-12-27 15:11:47,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 507 transitions. [2019-12-27 15:11:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:47,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:47,572 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,774 INFO L410 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -733898669, now seen corresponding path program 213 times [2019-12-27 15:11:47,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75616007] [2019-12-27 15:11:47,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75616007] [2019-12-27 15:11:47,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993373865] [2019-12-27 15:11:47,870 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:47,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:47,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:47,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:48,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:48,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:48,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322649229] [2019-12-27 15:11:48,881 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:48,882 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:48,884 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:48,884 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:48,885 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:48,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:48,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=221, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:11:48,886 INFO L87 Difference]: Start difference. First operand 204 states and 507 transitions. Second operand 10 states. [2019-12-27 15:11:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:50,032 INFO L93 Difference]: Finished difference Result 260 states and 612 transitions. [2019-12-27 15:11:50,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:50,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:50,034 INFO L225 Difference]: With dead ends: 260 [2019-12-27 15:11:50,034 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 15:11:50,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=416, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 15:11:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 206. [2019-12-27 15:11:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 515 transitions. [2019-12-27 15:11:50,038 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 515 transitions. Word has length 14 [2019-12-27 15:11:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:50,038 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 515 transitions. [2019-12-27 15:11:50,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 515 transitions. [2019-12-27 15:11:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:50,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:50,039 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:50,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,240 INFO L410 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -733898824, now seen corresponding path program 214 times [2019-12-27 15:11:50,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:50,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062493606] [2019-12-27 15:11:50,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:50,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062493606] [2019-12-27 15:11:50,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701542255] [2019-12-27 15:11:50,332 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:50,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:50,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:50,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:53,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:53,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1401563058] [2019-12-27 15:11:53,408 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:53,409 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:53,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:53,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:53,413 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:53,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:53,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:53,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=220, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:53,414 INFO L87 Difference]: Start difference. First operand 206 states and 515 transitions. Second operand 10 states. [2019-12-27 15:11:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:54,007 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2019-12-27 15:11:54,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:54,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:54,008 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:11:54,008 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:11:54,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=181, Invalid=418, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:11:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:11:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2019-12-27 15:11:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:11:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 511 transitions. [2019-12-27 15:11:54,013 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 511 transitions. Word has length 14 [2019-12-27 15:11:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:54,013 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 511 transitions. [2019-12-27 15:11:54,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 511 transitions. [2019-12-27 15:11:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:54,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:54,013 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:54,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,214 INFO L410 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash -733903474, now seen corresponding path program 215 times [2019-12-27 15:11:54,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:54,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695641072] [2019-12-27 15:11:54,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695641072] [2019-12-27 15:11:54,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072034220] [2019-12-27 15:11:54,304 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:54,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:54,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:54,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:55,184 WARN L192 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:11:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:55,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:55,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:55,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1069907905] [2019-12-27 15:11:55,185 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:55,185 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:55,187 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:55,187 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:55,188 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:55,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:55,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:55,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:55,189 INFO L87 Difference]: Start difference. First operand 205 states and 511 transitions. Second operand 10 states. [2019-12-27 15:11:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:56,361 INFO L93 Difference]: Finished difference Result 269 states and 634 transitions. [2019-12-27 15:11:56,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:56,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:56,362 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:11:56,363 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:11:56,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=182, Invalid=417, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:11:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:11:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 206. [2019-12-27 15:11:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 515 transitions. [2019-12-27 15:11:56,367 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 515 transitions. Word has length 14 [2019-12-27 15:11:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:56,368 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 515 transitions. [2019-12-27 15:11:56,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 515 transitions. [2019-12-27 15:11:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:56,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:56,368 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:56,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,572 INFO L410 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -733903629, now seen corresponding path program 216 times [2019-12-27 15:11:56,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:56,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575840105] [2019-12-27 15:11:56,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:56,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575840105] [2019-12-27 15:11:56,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316680176] [2019-12-27 15:11:56,659 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,704 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:11:56,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:56,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:56,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:56,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:56,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:56,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [59929971] [2019-12-27 15:11:56,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:56,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:56,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:56,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:56,853 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:56,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:56,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:56,853 INFO L87 Difference]: Start difference. First operand 206 states and 515 transitions. Second operand 10 states. [2019-12-27 15:11:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:57,070 INFO L93 Difference]: Finished difference Result 276 states and 647 transitions. [2019-12-27 15:11:57,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:57,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:57,072 INFO L225 Difference]: With dead ends: 276 [2019-12-27 15:11:57,072 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 15:11:57,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 15:11:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 203. [2019-12-27 15:11:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:11:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 504 transitions. [2019-12-27 15:11:57,082 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 504 transitions. Word has length 14 [2019-12-27 15:11:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:57,082 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 504 transitions. [2019-12-27 15:11:57,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 504 transitions. [2019-12-27 15:11:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:57,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:57,083 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:57,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,283 INFO L410 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:57,284 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 217 times [2019-12-27 15:11:57,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:57,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398394675] [2019-12-27 15:11:57,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398394675] [2019-12-27 15:11:57,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212101011] [2019-12-27 15:11:57,380 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:57,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:57,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:57,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:57,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1627082013] [2019-12-27 15:11:57,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:57,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:57,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:57,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:57,531 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:57,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:57,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:57,532 INFO L87 Difference]: Start difference. First operand 203 states and 504 transitions. Second operand 10 states. [2019-12-27 15:11:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:57,746 INFO L93 Difference]: Finished difference Result 256 states and 604 transitions. [2019-12-27 15:11:57,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:57,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:57,747 INFO L225 Difference]: With dead ends: 256 [2019-12-27 15:11:57,747 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 15:11:57,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 15:11:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 206. [2019-12-27 15:11:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 516 transitions. [2019-12-27 15:11:57,751 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 516 transitions. Word has length 14 [2019-12-27 15:11:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:57,752 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 516 transitions. [2019-12-27 15:11:57,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 516 transitions. [2019-12-27 15:11:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:57,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:57,752 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:57,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,953 INFO L410 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 218 times [2019-12-27 15:11:57,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:57,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656183982] [2019-12-27 15:11:57,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656183982] [2019-12-27 15:11:58,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881643657] [2019-12-27 15:11:58,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:58,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:58,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:58,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:58,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:58,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [5387028] [2019-12-27 15:11:58,198 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:58,199 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:58,201 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:58,201 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:58,201 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:58,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:58,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:58,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:58,202 INFO L87 Difference]: Start difference. First operand 206 states and 516 transitions. Second operand 10 states. [2019-12-27 15:11:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:58,454 INFO L93 Difference]: Finished difference Result 276 states and 647 transitions. [2019-12-27 15:11:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:58,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:58,455 INFO L225 Difference]: With dead ends: 276 [2019-12-27 15:11:58,455 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 15:11:58,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 15:11:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 205. [2019-12-27 15:11:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:11:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 512 transitions. [2019-12-27 15:11:58,460 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 512 transitions. Word has length 14 [2019-12-27 15:11:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:58,460 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 512 transitions. [2019-12-27 15:11:58,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 512 transitions. [2019-12-27 15:11:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:58,460 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:58,461 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:58,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,661 INFO L410 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 219 times [2019-12-27 15:11:58,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:58,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375249863] [2019-12-27 15:11:58,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375249863] [2019-12-27 15:11:58,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038121384] [2019-12-27 15:11:58,762 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:58,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:58,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:58,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:58,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:58,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:58,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193226478] [2019-12-27 15:11:58,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:58,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:58,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:58,921 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:58,921 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:58,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:58,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:58,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:58,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:58,922 INFO L87 Difference]: Start difference. First operand 205 states and 512 transitions. Second operand 10 states. [2019-12-27 15:11:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:59,160 INFO L93 Difference]: Finished difference Result 265 states and 621 transitions. [2019-12-27 15:11:59,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:59,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:59,161 INFO L225 Difference]: With dead ends: 265 [2019-12-27 15:11:59,161 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 15:11:59,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 15:11:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2019-12-27 15:11:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-27 15:11:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 516 transitions. [2019-12-27 15:11:59,166 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 516 transitions. Word has length 14 [2019-12-27 15:11:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:59,166 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 516 transitions. [2019-12-27 15:11:59,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 516 transitions. [2019-12-27 15:11:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:59,166 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:59,166 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:59,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:59,367 INFO L410 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 220 times [2019-12-27 15:11:59,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:59,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560638570] [2019-12-27 15:11:59,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:59,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560638570] [2019-12-27 15:11:59,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578156495] [2019-12-27 15:11:59,469 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:59,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:59,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:59,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:59,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:59,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:59,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:59,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [756131855] [2019-12-27 15:11:59,625 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:59,625 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:59,627 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:59,627 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:59,628 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:59,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:59,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:59,629 INFO L87 Difference]: Start difference. First operand 206 states and 516 transitions. Second operand 10 states. [2019-12-27 15:11:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:59,868 INFO L93 Difference]: Finished difference Result 273 states and 639 transitions. [2019-12-27 15:11:59,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:59,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:59,869 INFO L225 Difference]: With dead ends: 273 [2019-12-27 15:11:59,869 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 15:11:59,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 15:11:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 204. [2019-12-27 15:11:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:11:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 508 transitions. [2019-12-27 15:11:59,874 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 508 transitions. Word has length 14 [2019-12-27 15:11:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:59,874 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 508 transitions. [2019-12-27 15:11:59,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 508 transitions. [2019-12-27 15:11:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:59,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:59,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:00,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,075 INFO L410 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 221 times [2019-12-27 15:12:00,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:00,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589678702] [2019-12-27 15:12:00,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:00,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589678702] [2019-12-27 15:12:00,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994065676] [2019-12-27 15:12:00,172 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,218 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:12:00,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:00,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:00,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:00,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:00,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:12:00,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147609377] [2019-12-27 15:12:00,350 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:00,351 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:00,353 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:12:00,353 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:00,354 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:12:00,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:00,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:00,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:00,355 INFO L87 Difference]: Start difference. First operand 204 states and 508 transitions. Second operand 10 states. Received shutdown request... [2019-12-27 15:12:00,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:12:00,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,565 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 15:12:00,570 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 15:12:00,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:12:00 BasicIcfg [2019-12-27 15:12:00,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:12:00,571 INFO L168 Benchmark]: Toolchain (without parser) took 293079.56 ms. Allocated memory was 143.1 MB in the beginning and 194.5 MB in the end (delta: 51.4 MB). Free memory was 98.6 MB in the beginning and 101.6 MB in the end (delta: -3.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,572 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.45 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 98.2 MB in the beginning and 158.9 MB in the end (delta: -60.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.38 ms. Allocated memory is still 200.8 MB. Free memory was 158.9 MB in the beginning and 156.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,572 INFO L168 Benchmark]: Boogie Preprocessor took 26.03 ms. Allocated memory is still 200.8 MB. Free memory was 156.8 MB in the beginning and 155.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,573 INFO L168 Benchmark]: RCFGBuilder took 391.76 ms. Allocated memory is still 200.8 MB. Free memory was 155.4 MB in the beginning and 135.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,573 INFO L168 Benchmark]: TraceAbstraction took 291880.12 ms. Allocated memory was 200.8 MB in the beginning and 194.5 MB in the end (delta: -6.3 MB). Free memory was 135.2 MB in the beginning and 101.6 MB in the end (delta: 33.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,574 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.45 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 98.2 MB in the beginning and 158.9 MB in the end (delta: -60.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.38 ms. Allocated memory is still 200.8 MB. Free memory was 158.9 MB in the beginning and 156.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.03 ms. Allocated memory is still 200.8 MB. Free memory was 156.8 MB in the beginning and 155.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.76 ms. Allocated memory is still 200.8 MB. Free memory was 155.4 MB in the beginning and 135.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 291880.12 ms. Allocated memory was 200.8 MB in the beginning and 194.5 MB in the end (delta: -6.3 MB). Free memory was 135.2 MB in the beginning and 101.6 MB in the end (delta: 33.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (204states) and FLOYD_HOARE automaton (currently 3 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 291.7s, OverallIterations: 236, TraceHistogramMax: 7, AutomataDifference: 106.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2184 SDtfs, 19637 SDslu, 10576 SDs, 0 SdLazy, 5615 SolverSat, 3535 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6023 GetRequests, 1803 SyntacticMatches, 0 SemanticMatches, 4220 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 16617 ImplicationChecksByTransitivity, 213.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 235 MinimizatonAttempts, 9337 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 120.9s InterpolantComputationTime, 6045 NumberOfCodeBlocks, 6045 NumberOfCodeBlocksAsserted, 791 NumberOfCheckSat, 5578 ConstructedInterpolants, 249 QuantifiedInterpolants, 674235 SizeOfPredicates, 2 NumberOfNonLiveVariables, 21707 ConjunctsInSsa, 2569 ConjunctsInUnsatCore, 467 InterpolantComputations, 7 PerfectInterpolantSequences, 42/3714 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown