/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:06,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:06,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:06,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:06,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:06,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:06,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:06,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:06,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:06,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:06,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:06,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:06,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:06,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:06,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:06,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:06,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:06,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:06,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:06,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:06,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:06,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:06,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:06,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:06,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:06,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:06,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:06,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:06,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:06,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:06,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:06,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:06,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:06,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:06,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:06,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:06,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:06,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:06,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:06,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:06,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:06,220 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 15:07:06,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:06,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:06,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:06,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:06,241 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:06,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:06,241 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:06,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:06,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:06,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:06,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:06,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:06,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:06,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:06,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:06,244 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:06,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:06,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:06,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:06,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:06,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:06,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:06,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:06,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:06,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:06,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:06,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:06,246 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:06,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:06,247 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:06,248 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$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:06,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:06,540 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$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-27 15:07:06,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56220f599/3ac71817a3f8490eb427c59a664c90a0/FLAGe639182ee [2019-12-27 15:07:07,206 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:07,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-27 15:07:07,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56220f599/3ac71817a3f8490eb427c59a664c90a0/FLAGe639182ee [2019-12-27 15:07:07,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56220f599/3ac71817a3f8490eb427c59a664c90a0 [2019-12-27 15:07:07,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:07,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:07,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:07,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:07,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:07,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfc033c 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 15:07:07,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:07,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:08,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,050 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:08,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,180 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:08,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08 WrapperNode [2019-12-27 15:07:08,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:08,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:08,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:08,192 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 15:07:08,227 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 15:07:08,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:08,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:08,267 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 15:07:08,267 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 15:07:08,272 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 15:07:08,272 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 15:07:08,288 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 15:07:08,294 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 15:07:08,296 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 15:07:08,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:08,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:08,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:08,300 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 15:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:07:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:07:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:08,363 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 15:07:08,719 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:08,720 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:07:08,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08 BoogieIcfgContainer [2019-12-27 15:07:08,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:08,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:08,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:08,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:08,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:07" (1/3) ... [2019-12-27 15:07:08,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd1528e 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 15:07:08,727 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 15:07:08,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd1528e 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 15:07:08,728 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 15:07:08,730 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2019-12-27 15:07:08,739 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:08,740 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:08,745 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:08,746 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,772 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,773 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,778 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,778 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,778 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,778 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,779 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,779 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 |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,783 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,784 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,784 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,784 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,785 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,785 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,800 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,801 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,801 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,801 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,802 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,802 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,815 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:08,835 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:08,836 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:08,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:08,836 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:08,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:08,836 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:08,836 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:08,836 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:08,849 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 15:07:08,851 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,892 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,892 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,899 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 15:07:08,903 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,922 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,922 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,924 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 15:07:08,926 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 15:07:08,927 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:10,193 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 15:07:10,311 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 15:07:10,312 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 15:07:10,316 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:07:10,328 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:07:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:07:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:07:10,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,340 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:07:10,341 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,348 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 15:07:10,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770521175] [2019-12-27 15:07:10,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,585 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 15:07:10,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770521175] [2019-12-27 15:07:10,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:07:10,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1009489418] [2019-12-27 15:07:10,589 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,595 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,608 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:07:10,609 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,613 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:10,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,632 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:07:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,656 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 15:07:10,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:10,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:07:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,669 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:10,669 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:07:10,671 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 15:07:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:07:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:07:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:07:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 15:07:10,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 15:07:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,711 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 15:07:10,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 15:07:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,713 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,713 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,713 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 15:07:10,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970473867] [2019-12-27 15:07:10,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,828 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 15:07:10,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970473867] [2019-12-27 15:07:10,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:10,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1606022810] [2019-12-27 15:07:10,829 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,832 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:10,832 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,832 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:10,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,835 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 15:07:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,863 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 15:07:10,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:10,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,866 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:07:10,866 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:07:10,867 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 15:07:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:07:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 15:07:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 15:07:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 15:07:10,874 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 15:07:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,874 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 15:07:10,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 15:07:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,876 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,876 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 15:07:10,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532199861] [2019-12-27 15:07:10,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,982 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 15:07:10,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532199861] [2019-12-27 15:07:10,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:10,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1438747289] [2019-12-27 15:07:10,983 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,984 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,986 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:07:10,986 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 2 times. [2019-12-27 15:07:10,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:10,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:10,992 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 15:07:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,007 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 15:07:11,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:11,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,009 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:11,009 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:11,010 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 15:07:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 15:07:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:07:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 15:07:11,017 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 15:07:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,017 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 15:07:11,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 15:07:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,019 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,019 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 15:07:11,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366667792] [2019-12-27 15:07:11,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,108 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 15:07:11,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366667792] [2019-12-27 15:07:11,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214035604] [2019-12-27 15:07:11,109 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 15:07:11,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,230 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 15:07:11,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1410339875] [2019-12-27 15:07:11,232 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,233 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,234 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:11,234 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,234 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:11,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,235 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 15:07:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,259 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 15:07:11,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,263 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:07:11,263 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:07:11,264 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 15:07:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:07:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 15:07:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:07:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 15:07:11,272 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 15:07:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,272 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 15:07:11,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 15:07:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,273 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,480 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 15:07:11,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984186097] [2019-12-27 15:07:11,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,558 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 15:07:11,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984186097] [2019-12-27 15:07:11,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791530610] [2019-12-27 15:07:11,559 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 15:07:11,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,655 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 15:07:11,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1615833267] [2019-12-27 15:07:11,656 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,657 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,658 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 15:07:11,658 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,661 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:07:11,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,662 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 5 states. [2019-12-27 15:07:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,693 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 15:07:11,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,695 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:07:11,695 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:07:11,695 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 15:07:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:07:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 15:07:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 15:07:11,703 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 15:07:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,704 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 15:07:11,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 15:07:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:11,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,705 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 15:07:11,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299586765] [2019-12-27 15:07:11,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,992 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 15:07:11,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299586765] [2019-12-27 15:07:11,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605164117] [2019-12-27 15:07:11,993 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 15:07:12,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,120 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 15:07:12,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [179162295] [2019-12-27 15:07:12,121 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,124 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:12,124 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,124 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,126 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 15:07:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,156 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 15:07:12,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,157 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:07:12,157 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:12,158 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 15:07:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 15:07:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:07:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 15:07:12,173 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 15:07:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,173 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 15:07:12,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 15:07:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,191 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,396 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 15:07:12,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808157863] [2019-12-27 15:07:12,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,481 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 15:07:12,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808157863] [2019-12-27 15:07:12,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [651800170] [2019-12-27 15:07:12,483 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,484 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,485 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:07:12,485 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,486 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,487 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 15:07:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,508 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 15:07:12,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,510 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:07:12,510 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:07:12,511 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 15:07:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:07:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 15:07:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:07:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 15:07:12,517 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 15:07:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,518 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 15:07:12,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 15:07:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,520 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,520 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 15:07:12,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665066007] [2019-12-27 15:07:12,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,567 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 15:07:12,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665066007] [2019-12-27 15:07:12,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970125334] [2019-12-27 15:07:12,569 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,570 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,571 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:07:12,572 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:12,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,575 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 15:07:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,617 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-27 15:07:12,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,618 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:07:12,618 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:07:12,619 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 15:07:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:07:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-27 15:07:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:07:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 15:07:12,634 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 15:07:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,634 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 15:07:12,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 15:07:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,635 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,636 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 15:07:12,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254717170] [2019-12-27 15:07:12,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,720 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 15:07:12,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254717170] [2019-12-27 15:07:12,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782122112] [2019-12-27 15:07:12,721 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 15:07:12,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,825 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 15:07:12,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [699718901] [2019-12-27 15:07:12,826 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,829 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 15:07:12,829 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,832 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:12,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,833 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 6 states. [2019-12-27 15:07:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,893 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 15:07:12,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,895 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:07:12,896 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:07:12,896 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 15:07:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:07:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 15:07:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 15:07:12,909 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 15:07:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,910 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 15:07:12,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 15:07:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:12,911 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,911 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,112 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 15:07:13,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364704996] [2019-12-27 15:07:13,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,208 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 15:07:13,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364704996] [2019-12-27 15:07:13,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183450849] [2019-12-27 15:07:13,209 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 15:07:13,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:13,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,374 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 15:07:13,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:13,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [33818642] [2019-12-27 15:07:13,375 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,376 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,377 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 15:07:13,377 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:13,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,380 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 15:07:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,404 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 15:07:13,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:13,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,405 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:07:13,405 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:07:13,406 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 15:07:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:07:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 15:07:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,419 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,419 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,421 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,625 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,626 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 15:07:13,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775200852] [2019-12-27 15:07:13,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,694 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 15:07:13,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775200852] [2019-12-27 15:07:13,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280092934] [2019-12-27 15:07:13,695 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 15:07:13,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:13,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,831 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 15:07:13,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [278282182] [2019-12-27 15:07:13,832 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,833 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 15:07:13,835 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,835 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:13,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,836 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,853 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-27 15:07:13,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:13,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,854 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:07:13,854 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:07:13,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:07:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-27 15:07:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,859 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,859 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,861 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,861 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,062 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 15:07:14,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860670233] [2019-12-27 15:07:14,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,112 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 15:07:14,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860670233] [2019-12-27 15:07:14,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884701061] [2019-12-27 15:07:14,113 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 15:07:14,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:14,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,220 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 15:07:14,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323451973] [2019-12-27 15:07:14,221 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,222 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,223 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,223 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,223 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,225 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,257 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:14,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,258 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:14,258 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:14,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-27 15:07:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:14,263 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,263 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:14,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,264 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,465 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 15:07:14,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977128838] [2019-12-27 15:07:14,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,516 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 15:07:14,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977128838] [2019-12-27 15:07:14,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481309830] [2019-12-27 15:07:14,516 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 15:07:14,568 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:14,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1455997131] [2019-12-27 15:07:14,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,630 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,632 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,632 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,634 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,682 INFO L93 Difference]: Finished difference Result 84 states and 180 transitions. [2019-12-27 15:07:14,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,684 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:07:14,684 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:07:14,685 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 15:07:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:07:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-12-27 15:07:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:14,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,696 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:14,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,698 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,899 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-27 15:07:14,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725418995] [2019-12-27 15:07:14,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,977 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 15:07:14,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725418995] [2019-12-27 15:07:14,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481546316] [2019-12-27 15:07:14,978 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 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 15:07:15,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:15,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:15,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,153 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 15:07:15,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317187078] [2019-12-27 15:07:15,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,159 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 15:07:15,159 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:15,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,165 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,242 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,244 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,244 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-27 15:07:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:15,254 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,255 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:15,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,257 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,461 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,462 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-27 15:07:15,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354473959] [2019-12-27 15:07:15,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,525 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 15:07:15,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354473959] [2019-12-27 15:07:15,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844184964] [2019-12-27 15:07:15,526 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 15:07:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,648 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 15:07:15,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [698486200] [2019-12-27 15:07:15,649 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,651 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,656 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:15,657 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,659 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:15,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,660 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,753 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:15,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,755 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:15,755 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:15,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2019-12-27 15:07:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:15,761 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,762 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:15,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,763 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,969 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-27 15:07:15,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072301525] [2019-12-27 15:07:15,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,061 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 15:07:16,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072301525] [2019-12-27 15:07:16,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140501486] [2019-12-27 15:07:16,062 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 15:07:16,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:16,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,165 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 15:07:16,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:16,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [523468620] [2019-12-27 15:07:16,166 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,166 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,168 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:16,170 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,173 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:16,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:16,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:16,174 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,224 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:16,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:16,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,227 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:16,227 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:16,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2019-12-27 15:07:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:07:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 15:07:16,231 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 15:07:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,232 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 15:07:16,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 15:07:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:16,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,232 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,436 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 15:07:16,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737494264] [2019-12-27 15:07:16,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,494 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 15:07:16,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737494264] [2019-12-27 15:07:16,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866874689] [2019-12-27 15:07:16,495 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 15:07:16,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:16,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,616 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 15:07:16,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:16,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193280412] [2019-12-27 15:07:16,617 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,618 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,620 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 15:07:16,620 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,623 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 15:07:16,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:16,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,624 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 7 states. [2019-12-27 15:07:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,713 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 15:07:16,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:16,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,715 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:07:16,715 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:07:16,716 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 15:07:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:07:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 15:07:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 15:07:16,720 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 15:07:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,720 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 15:07:16,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 15:07:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:16,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,721 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,929 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 15:07:16,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404658237] [2019-12-27 15:07:16,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,025 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 15:07:17,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404658237] [2019-12-27 15:07:17,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616236353] [2019-12-27 15:07:17,027 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 15:07:17,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:17,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,204 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 15:07:17,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:17,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [553061422] [2019-12-27 15:07:17,208 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,208 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:17,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,210 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:17,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,211 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 15:07:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,240 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 15:07:17,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:17,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,241 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:07:17,241 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:07:17,242 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 15:07:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:07:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 15:07:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,246 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,247 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,248 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,456 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-27 15:07:17,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165993741] [2019-12-27 15:07:17,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,514 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 15:07:17,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165993741] [2019-12-27 15:07:17,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484426735] [2019-12-27 15:07:17,514 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 15:07:17,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:17,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,604 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 15:07:17,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:07:17,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [497050574] [2019-12-27 15:07:17,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,606 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,607 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:17,608 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,608 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:17,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:17,609 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,629 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-27 15:07:17,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,631 INFO L225 Difference]: With dead ends: 98 [2019-12-27 15:07:17,631 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 15:07:17,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 15:07:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-27 15:07:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,635 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,635 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,636 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,636 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,838 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-27 15:07:17,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257579542] [2019-12-27 15:07:17,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,895 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 15:07:17,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257579542] [2019-12-27 15:07:17,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831135378] [2019-12-27 15:07:17,895 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 15:07:17,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:17,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,006 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 15:07:18,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782274433] [2019-12-27 15:07:18,007 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,008 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,010 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,010 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,010 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,011 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,057 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,058 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,058 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,064 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,064 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,270 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-27 15:07:18,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617820604] [2019-12-27 15:07:18,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,334 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 15:07:18,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617820604] [2019-12-27 15:07:18,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624262561] [2019-12-27 15:07:18,335 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 15:07:18,380 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,533 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 15:07:18,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [308265436] [2019-12-27 15:07:18,534 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,535 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,536 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,536 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,537 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,537 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,592 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,593 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,593 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,593 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 15:07:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,598 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,600 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,601 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,803 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-27 15:07:18,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774010147] [2019-12-27 15:07:18,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,868 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 15:07:18,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774010147] [2019-12-27 15:07:18,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212616646] [2019-12-27 15:07:18,870 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 15:07:18,918 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:18,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,978 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 15:07:18,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [321384247] [2019-12-27 15:07:18,979 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,980 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,981 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:18,981 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,982 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,983 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,035 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-27 15:07:19,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,037 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,037 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,037 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 15:07:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-27 15:07:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:19,040 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,041 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:19,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,041 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,242 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-27 15:07:19,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767978242] [2019-12-27 15:07:19,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,303 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 15:07:19,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767978242] [2019-12-27 15:07:19,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096683784] [2019-12-27 15:07:19,304 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 15:07:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,440 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 15:07:19,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1544836778] [2019-12-27 15:07:19,442 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,446 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,448 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,448 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,449 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,450 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,548 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:19,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,550 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,550 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,552 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 15:07:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:19,557 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,557 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:19,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,558 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,559 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,764 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-27 15:07:19,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326097318] [2019-12-27 15:07:19,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,842 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 15:07:19,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326097318] [2019-12-27 15:07:19,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326295200] [2019-12-27 15:07:19,843 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 15:07:19,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:19,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,965 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 15:07:19,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1103666438] [2019-12-27 15:07:19,966 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,967 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,969 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,969 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,969 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,971 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,035 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2019-12-27 15:07:20,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,036 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:20,036 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:20,037 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 15:07:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2019-12-27 15:07:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,040 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,040 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,043 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,043 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,246 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-27 15:07:20,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368199367] [2019-12-27 15:07:20,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,298 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 15:07:20,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368199367] [2019-12-27 15:07:20,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160989078] [2019-12-27 15:07:20,299 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 15:07:20,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:20,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,417 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 15:07:20,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508461008] [2019-12-27 15:07:20,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,419 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,420 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,420 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,420 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,421 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,474 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:20,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,476 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:20,476 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:20,476 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 15:07:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,480 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,480 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,481 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,689 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-27 15:07:20,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999150318] [2019-12-27 15:07:20,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,743 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 15:07:20,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999150318] [2019-12-27 15:07:20,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93065110] [2019-12-27 15:07:20,744 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 15:07:20,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:20,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,871 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 15:07:20,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [284746271] [2019-12-27 15:07:20,873 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,873 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,875 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:20,876 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,882 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:20,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,884 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,975 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:20,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,976 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:20,977 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:20,977 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 15:07:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:20,980 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,980 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:20,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,983 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,184 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-27 15:07:21,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819422121] [2019-12-27 15:07:21,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,242 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 15:07:21,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819422121] [2019-12-27 15:07:21,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584256324] [2019-12-27 15:07:21,243 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 15:07:21,293 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:21,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,377 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 15:07:21,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [194663678] [2019-12-27 15:07:21,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,379 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,383 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,383 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,385 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,386 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,502 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-27 15:07:21,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,504 INFO L225 Difference]: With dead ends: 109 [2019-12-27 15:07:21,504 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 15:07:21,504 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 15:07:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 15:07:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2019-12-27 15:07:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:21,507 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,508 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:21,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,509 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,509 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,710 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-27 15:07:21,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863431784] [2019-12-27 15:07:21,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,762 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 15:07:21,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863431784] [2019-12-27 15:07:21,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157904128] [2019-12-27 15:07:21,762 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 15:07:21,805 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:21,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,884 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 15:07:21,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [482601158] [2019-12-27 15:07:21,885 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,886 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,887 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,887 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,890 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,890 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,972 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:21,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,973 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:21,973 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:21,974 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 15:07:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-12-27 15:07:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 15:07:21,977 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 15:07:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,977 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 15:07:21,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 15:07:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,978 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,182 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-27 15:07:22,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067020076] [2019-12-27 15:07:22,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,245 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 15:07:22,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067020076] [2019-12-27 15:07:22,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783204481] [2019-12-27 15:07:22,246 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 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 15:07:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,336 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 15:07:22,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2000399515] [2019-12-27 15:07:22,337 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,338 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,339 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,339 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,340 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,341 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 7 states. [2019-12-27 15:07:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,427 INFO L93 Difference]: Finished difference Result 108 states and 227 transitions. [2019-12-27 15:07:22,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,428 INFO L225 Difference]: With dead ends: 108 [2019-12-27 15:07:22,428 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 15:07:22,429 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 15:07:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 15:07:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-27 15:07:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:22,432 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,433 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:22,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,433 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,634 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-27 15:07:22,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967603749] [2019-12-27 15:07:22,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,689 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 15:07:22,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967603749] [2019-12-27 15:07:22,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380578576] [2019-12-27 15:07:22,690 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 15:07:22,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:22,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,800 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 15:07:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [495149184] [2019-12-27 15:07:22,801 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,804 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,806 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,806 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,905 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-27 15:07:22,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,907 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:22,907 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:22,907 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 15:07:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:22,911 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,911 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:22,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,912 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,113 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-27 15:07:23,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915649884] [2019-12-27 15:07:23,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,173 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 15:07:23,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915649884] [2019-12-27 15:07:23,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192981405] [2019-12-27 15:07:23,174 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 15:07:23,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:23,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,293 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 15:07:23,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2146319968] [2019-12-27 15:07:23,294 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,295 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,296 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,296 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,297 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,298 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,383 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-27 15:07:23,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,385 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:23,385 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:23,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:23,389 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,389 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:23,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,390 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,593 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385739, now seen corresponding path program 22 times [2019-12-27 15:07:23,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888532769] [2019-12-27 15:07:23,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,658 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 15:07:23,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888532769] [2019-12-27 15:07:23,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539496519] [2019-12-27 15:07:23,659 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 15:07:23,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:23,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,774 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 15:07:23,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1851223935] [2019-12-27 15:07:23,775 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,776 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,777 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,777 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,778 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,779 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,860 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2019-12-27 15:07:23,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,861 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:23,861 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:23,861 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 15:07:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2019-12-27 15:07:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:07:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 15:07:23,864 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 15:07:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,865 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 15:07:23,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 15:07:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,865 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,070 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 15:07:24,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830871382] [2019-12-27 15:07:24,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,135 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 15:07:24,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830871382] [2019-12-27 15:07:24,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90187546] [2019-12-27 15:07:24,136 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 15:07:24,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:24,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,245 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 15:07:24,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:24,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1318159357] [2019-12-27 15:07:24,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,247 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,249 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:24,249 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,252 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 15:07:24,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:24,253 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 8 states. [2019-12-27 15:07:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,359 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 15:07:24,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,361 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:07:24,361 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 15:07:24,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 15:07:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 15:07:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:07:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 15:07:24,366 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 15:07:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,366 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 15:07:24,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 15:07:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,367 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,367 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,567 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 15:07:24,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360827186] [2019-12-27 15:07:24,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,651 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 15:07:24,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360827186] [2019-12-27 15:07:24,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072396293] [2019-12-27 15:07:24,652 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 15:07:24,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:24,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,801 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 15:07:24,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:24,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925774985] [2019-12-27 15:07:24,802 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,805 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:24,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,805 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:24,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:24,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:24,806 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 9 states. [2019-12-27 15:07:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,847 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-27 15:07:24,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:24,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,848 INFO L225 Difference]: With dead ends: 110 [2019-12-27 15:07:24,848 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 15:07:24,848 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 15:07:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 15:07:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-27 15:07:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:24,852 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,852 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:24,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,853 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,056 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 23 times [2019-12-27 15:07:25,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806980314] [2019-12-27 15:07:25,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,121 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 15:07:25,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806980314] [2019-12-27 15:07:25,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137170841] [2019-12-27 15:07:25,121 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:25,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:25,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,258 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 15:07:25,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1709888237] [2019-12-27 15:07:25,259 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,260 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,262 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 15:07:25,262 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,262 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,263 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,291 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-27 15:07:25,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,292 INFO L225 Difference]: With dead ends: 116 [2019-12-27 15:07:25,292 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 15:07:25,292 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 15:07:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 15:07:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-27 15:07:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:25,296 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,297 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:25,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,298 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,298 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,501 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 24 times [2019-12-27 15:07:25,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944985996] [2019-12-27 15:07:25,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,558 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 15:07:25,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944985996] [2019-12-27 15:07:25,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440649635] [2019-12-27 15:07:25,559 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 15:07:25,604 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:25,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,682 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 15:07:25,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1816222550] [2019-12-27 15:07:25,683 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,684 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,686 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:25,686 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,686 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,687 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,732 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-27 15:07:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,734 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:25,734 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:25,734 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 15:07:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-27 15:07:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:25,737 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,737 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:25,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,738 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,942 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 25 times [2019-12-27 15:07:25,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149238574] [2019-12-27 15:07:25,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,005 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 15:07:26,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149238574] [2019-12-27 15:07:26,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292519316] [2019-12-27 15:07:26,006 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 15:07:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,040 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 15:07:27,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:27,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1625204092] [2019-12-27 15:07:27,040 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,041 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,043 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:27,043 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,043 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:27,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:27,044 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,099 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-27 15:07:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:27,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,101 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:27,101 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:27,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:27,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,105 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:27,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:27,106 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,106 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,306 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 26 times [2019-12-27 15:07:27,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787327718] [2019-12-27 15:07:27,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,368 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 15:07:27,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787327718] [2019-12-27 15:07:27,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186101159] [2019-12-27 15:07:27,369 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 15:07:27,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:27,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:27,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:27,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:27,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [973488769] [2019-12-27 15:07:27,489 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:27,490 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:27,491 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:27,491 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:27,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:27,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:27,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:27,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:27,493 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:27,556 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-27 15:07:27,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:27,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:27,558 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:27,558 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:27,558 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 15:07:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:27,562 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:27,563 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:27,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:27,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:27,564 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:27,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:27,767 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 27 times [2019-12-27 15:07:27,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:27,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390756312] [2019-12-27 15:07:27,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:27,829 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 15:07:27,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390756312] [2019-12-27 15:07:27,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133545586] [2019-12-27 15:07:27,830 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 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 15:07:27,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:27,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:27,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:27,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,202 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 15:07:28,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:28,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710419323] [2019-12-27 15:07:28,203 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,204 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,206 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:28,206 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,206 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:28,207 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,295 INFO L93 Difference]: Finished difference Result 121 states and 263 transitions. [2019-12-27 15:07:28,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,297 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:28,297 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:28,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-27 15:07:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 15:07:28,301 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 15:07:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,301 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 15:07:28,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 15:07:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,302 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,505 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 28 times [2019-12-27 15:07:28,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365146899] [2019-12-27 15:07:28,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,571 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 15:07:28,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365146899] [2019-12-27 15:07:28,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077429347] [2019-12-27 15:07:28,572 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 15:07:28,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:28,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,735 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 15:07:28,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:28,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1766825180] [2019-12-27 15:07:28,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:28,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,739 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:28,740 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 8 states. [2019-12-27 15:07:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,813 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:28,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,815 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:28,815 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:28,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2019-12-27 15:07:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-27 15:07:28,819 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-27 15:07:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,820 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-27 15:07:28,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-27 15:07:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,820 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,024 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 29 times [2019-12-27 15:07:29,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855696612] [2019-12-27 15:07:29,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,082 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 15:07:29,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855696612] [2019-12-27 15:07:29,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148379920] [2019-12-27 15:07:29,083 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 15:07:29,125 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:29,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,247 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 15:07:29,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1030461692] [2019-12-27 15:07:29,248 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,250 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,251 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,251 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,251 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,252 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 8 states. [2019-12-27 15:07:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,324 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:29,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,326 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:29,326 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:29,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-27 15:07:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 15:07:29,331 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 15:07:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,331 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 15:07:29,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 15:07:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,332 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,535 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 30 times [2019-12-27 15:07:29,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093123976] [2019-12-27 15:07:29,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,599 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 15:07:29,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093123976] [2019-12-27 15:07:29,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677122456] [2019-12-27 15:07:29,600 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 15:07:29,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:29,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,726 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 15:07:29,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739946379] [2019-12-27 15:07:29,727 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,728 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:29,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,733 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 8 states. [2019-12-27 15:07:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,848 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-27 15:07:29,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,849 INFO L225 Difference]: With dead ends: 121 [2019-12-27 15:07:29,849 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 15:07:29,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 15:07:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-27 15:07:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:29,855 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,855 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:29,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,856 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,060 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 31 times [2019-12-27 15:07:30,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625629986] [2019-12-27 15:07:30,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,153 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 15:07:30,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625629986] [2019-12-27 15:07:30,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11817788] [2019-12-27 15:07:30,154 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 15:07:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,336 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 15:07:30,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093993291] [2019-12-27 15:07:30,338 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,339 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,342 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:30,342 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,342 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,345 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,506 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2019-12-27 15:07:30,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,508 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:30,508 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:30,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2019-12-27 15:07:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:30,516 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,516 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:30,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,518 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,722 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 32 times [2019-12-27 15:07:30,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679130602] [2019-12-27 15:07:30,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,797 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 15:07:30,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679130602] [2019-12-27 15:07:30,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445319047] [2019-12-27 15:07:30,798 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 15:07:30,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:30,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,931 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 15:07:30,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2138046114] [2019-12-27 15:07:30,932 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,933 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,935 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:30,935 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,935 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,937 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,045 INFO L93 Difference]: Finished difference Result 125 states and 270 transitions. [2019-12-27 15:07:31,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,047 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:31,047 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:31,047 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 15:07:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 15:07:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:31,051 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,051 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:31,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,052 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,255 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 33 times [2019-12-27 15:07:31,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009335740] [2019-12-27 15:07:31,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,323 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 15:07:31,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009335740] [2019-12-27 15:07:31,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271297164] [2019-12-27 15:07:31,324 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 15:07:31,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:31,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,459 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 15:07:31,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357120445] [2019-12-27 15:07:31,460 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,460 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,462 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,462 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,462 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,463 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,549 INFO L93 Difference]: Finished difference Result 124 states and 269 transitions. [2019-12-27 15:07:31,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,551 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:31,551 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:31,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2019-12-27 15:07:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:31,555 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,555 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:31,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,556 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,759 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 34 times [2019-12-27 15:07:31,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730218891] [2019-12-27 15:07:31,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,830 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 15:07:31,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730218891] [2019-12-27 15:07:31,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189657003] [2019-12-27 15:07:31,830 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 15:07:31,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:31,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,943 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 15:07:31,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242605304] [2019-12-27 15:07:31,944 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,945 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,947 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,032 INFO L93 Difference]: Finished difference Result 126 states and 271 transitions. [2019-12-27 15:07:32,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,033 INFO L225 Difference]: With dead ends: 126 [2019-12-27 15:07:32,033 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 15:07:32,034 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 15:07:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 15:07:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2019-12-27 15:07:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:32,038 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,039 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:32,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,039 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,243 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 35 times [2019-12-27 15:07:32,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573188936] [2019-12-27 15:07:32,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,314 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 15:07:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573188936] [2019-12-27 15:07:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932118933] [2019-12-27 15:07:32,315 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 15:07:32,358 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:32,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,436 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 15:07:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1999734284] [2019-12-27 15:07:32,437 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,441 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,443 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,443 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,443 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,444 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,550 INFO L93 Difference]: Finished difference Result 124 states and 269 transitions. [2019-12-27 15:07:32,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,552 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:32,552 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:32,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2019-12-27 15:07:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:32,574 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,574 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:32,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,575 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,575 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,780 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 36 times [2019-12-27 15:07:32,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839239527] [2019-12-27 15:07:32,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,834 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 15:07:32,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839239527] [2019-12-27 15:07:32,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358987103] [2019-12-27 15:07:32,835 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 15:07:32,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:32,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,959 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 15:07:32,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2107902533] [2019-12-27 15:07:32,960 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,961 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,963 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,963 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,964 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,059 INFO L93 Difference]: Finished difference Result 125 states and 270 transitions. [2019-12-27 15:07:33,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,061 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:33,061 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:33,062 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 15:07:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 15:07:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 15:07:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 15:07:33,065 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 15:07:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,065 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 15:07:33,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 15:07:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,066 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,267 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280155, now seen corresponding path program 37 times [2019-12-27 15:07:33,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932922548] [2019-12-27 15:07:33,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,344 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 15:07:33,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932922548] [2019-12-27 15:07:33,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040461099] [2019-12-27 15:07:33,345 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 15:07:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,465 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 15:07:33,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592301907] [2019-12-27 15:07:33,465 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,466 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,468 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,468 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,468 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,469 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 8 states. [2019-12-27 15:07:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,559 INFO L93 Difference]: Finished difference Result 122 states and 264 transitions. [2019-12-27 15:07:33,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,560 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:33,561 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:33,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2019-12-27 15:07:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:33,564 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,564 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:33,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,565 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,765 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 38 times [2019-12-27 15:07:33,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723683071] [2019-12-27 15:07:33,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,825 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 15:07:33,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723683071] [2019-12-27 15:07:33,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883742033] [2019-12-27 15:07:33,826 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 15:07:33,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:33,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,943 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 15:07:33,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1798548991] [2019-12-27 15:07:33,944 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,945 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,947 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 15:07:33,948 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,951 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:33,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,952 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,076 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2019-12-27 15:07:34,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,077 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:34,077 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:34,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2019-12-27 15:07:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:34,079 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,079 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:34,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,080 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,281 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 39 times [2019-12-27 15:07:34,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25987021] [2019-12-27 15:07:34,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,338 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 15:07:34,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25987021] [2019-12-27 15:07:34,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113480519] [2019-12-27 15:07:34,339 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 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 15:07:34,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:34,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,486 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 15:07:34,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [742164709] [2019-12-27 15:07:34,487 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:34,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,495 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:34,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,497 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,695 INFO L93 Difference]: Finished difference Result 129 states and 268 transitions. [2019-12-27 15:07:34,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,697 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:34,697 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:34,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:34,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,701 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:34,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,702 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,903 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 40 times [2019-12-27 15:07:34,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487065661] [2019-12-27 15:07:34,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,970 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 15:07:34,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487065661] [2019-12-27 15:07:34,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896597102] [2019-12-27 15:07:34,970 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 15:07:35,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:35,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,082 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 15:07:35,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143249210] [2019-12-27 15:07:35,083 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,086 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:35,086 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,088 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:35,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,088 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,208 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2019-12-27 15:07:35,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,210 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:35,210 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:35,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2019-12-27 15:07:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-27 15:07:35,214 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-27 15:07:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,214 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-27 15:07:35,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-27 15:07:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,215 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,418 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 41 times [2019-12-27 15:07:35,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131975288] [2019-12-27 15:07:35,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,510 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 15:07:35,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131975288] [2019-12-27 15:07:35,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684215050] [2019-12-27 15:07:35,511 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 15:07:35,552 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:35,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,649 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 15:07:35,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [231672850] [2019-12-27 15:07:35,650 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,651 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,653 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:35,653 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,655 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:35,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,657 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 8 states. [2019-12-27 15:07:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,808 INFO L93 Difference]: Finished difference Result 133 states and 278 transitions. [2019-12-27 15:07:35,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,810 INFO L225 Difference]: With dead ends: 133 [2019-12-27 15:07:35,810 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 15:07:35,810 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 15:07:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 15:07:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2019-12-27 15:07:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:35,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,815 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:35,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,815 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,016 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 42 times [2019-12-27 15:07:36,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104330478] [2019-12-27 15:07:36,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,091 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 15:07:36,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104330478] [2019-12-27 15:07:36,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297984839] [2019-12-27 15:07:36,091 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 15:07:36,145 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:36,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,308 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 15:07:36,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575783576] [2019-12-27 15:07:36,309 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,310 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,313 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,313 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,315 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:36,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,316 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,544 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 15:07:36,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:36,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,545 INFO L225 Difference]: With dead ends: 131 [2019-12-27 15:07:36,545 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 15:07:36,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 15:07:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-27 15:07:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:36,549 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,549 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:36,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,550 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,751 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 43 times [2019-12-27 15:07:36,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124268489] [2019-12-27 15:07:36,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,807 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 15:07:36,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124268489] [2019-12-27 15:07:36,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964972588] [2019-12-27 15:07:36,808 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,973 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 15:07:36,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [482884646] [2019-12-27 15:07:36,974 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,975 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,977 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:36,977 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,979 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:36,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,980 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,133 INFO L93 Difference]: Finished difference Result 130 states and 272 transitions. [2019-12-27 15:07:37,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,135 INFO L225 Difference]: With dead ends: 130 [2019-12-27 15:07:37,135 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 15:07:37,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 15:07:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2019-12-27 15:07:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:37,139 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,140 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:37,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,141 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,344 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666856, now seen corresponding path program 44 times [2019-12-27 15:07:37,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614026548] [2019-12-27 15:07:37,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,406 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 15:07:37,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614026548] [2019-12-27 15:07:37,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702230537] [2019-12-27 15:07:37,407 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 15:07:37,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:37,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:37,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:37,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534670700] [2019-12-27 15:07:37,540 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:37,541 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:37,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:37,542 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:37,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:37,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:37,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:37,545 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,656 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2019-12-27 15:07:37,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,658 INFO L225 Difference]: With dead ends: 125 [2019-12-27 15:07:37,658 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 15:07:37,658 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 15:07:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 15:07:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2019-12-27 15:07:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 15:07:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 209 transitions. [2019-12-27 15:07:37,662 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 209 transitions. Word has length 12 [2019-12-27 15:07:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,662 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 209 transitions. [2019-12-27 15:07:37,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 209 transitions. [2019-12-27 15:07:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,663 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,866 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 45 times [2019-12-27 15:07:37,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322889523] [2019-12-27 15:07:37,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,927 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 15:07:37,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322889523] [2019-12-27 15:07:37,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926724280] [2019-12-27 15:07:37,928 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 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 15:07:37,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:37,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,048 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 15:07:38,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2052027770] [2019-12-27 15:07:38,049 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,050 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,052 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:38,052 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,053 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:38,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,054 INFO L87 Difference]: Start difference. First operand 95 states and 209 transitions. Second operand 8 states. [2019-12-27 15:07:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,162 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-27 15:07:38,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,164 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:38,164 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:38,164 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 15:07:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:38,167 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,167 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:38,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,168 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,168 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,369 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 46 times [2019-12-27 15:07:38,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473312853] [2019-12-27 15:07:38,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,427 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 15:07:38,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473312853] [2019-12-27 15:07:38,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751586790] [2019-12-27 15:07:38,428 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 15:07:38,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:38,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:38,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,552 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 15:07:38,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [755346829] [2019-12-27 15:07:38,553 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,554 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,556 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:38,556 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,557 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:38,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,558 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,691 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:38,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,692 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:38,692 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:38,693 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 15:07:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2019-12-27 15:07:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:38,696 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,696 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:38,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,697 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,697 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,900 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 47 times [2019-12-27 15:07:38,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704024094] [2019-12-27 15:07:38,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,968 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 15:07:38,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704024094] [2019-12-27 15:07:38,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812324026] [2019-12-27 15:07:38,969 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 15:07:39,008 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:39,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,089 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 15:07:39,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970283417] [2019-12-27 15:07:39,090 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,091 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,092 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,093 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:39,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,095 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,232 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-27 15:07:39,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,234 INFO L225 Difference]: With dead ends: 128 [2019-12-27 15:07:39,234 INFO L226 Difference]: Without dead ends: 127 [2019-12-27 15:07:39,234 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 15:07:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-27 15:07:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2019-12-27 15:07:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:39,237 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,238 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:39,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,239 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,442 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 48 times [2019-12-27 15:07:39,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589950070] [2019-12-27 15:07:39,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,507 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 15:07:39,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589950070] [2019-12-27 15:07:39,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584162204] [2019-12-27 15:07:39,508 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 15:07:39,549 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:39,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,610 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 15:07:39,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [4908497] [2019-12-27 15:07:39,611 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,612 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,613 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,613 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,614 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:39,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,615 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,734 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:39,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,735 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:39,735 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:39,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2019-12-27 15:07:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:07:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-27 15:07:39,738 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-27 15:07:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,739 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-27 15:07:39,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-27 15:07:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,739 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,940 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279501, now seen corresponding path program 49 times [2019-12-27 15:07:39,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079352367] [2019-12-27 15:07:39,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,006 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 15:07:40,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079352367] [2019-12-27 15:07:40,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749854887] [2019-12-27 15:07:40,007 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 15:07:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,120 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 15:07:40,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [302794237] [2019-12-27 15:07:40,121 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,124 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,124 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,125 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:40,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,126 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 8 states. [2019-12-27 15:07:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,249 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-27 15:07:40,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,250 INFO L225 Difference]: With dead ends: 129 [2019-12-27 15:07:40,251 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 15:07:40,251 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 15:07:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 15:07:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2019-12-27 15:07:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:40,254 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,254 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:40,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,255 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,255 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,456 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 50 times [2019-12-27 15:07:40,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71555507] [2019-12-27 15:07:40,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,517 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 15:07:40,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71555507] [2019-12-27 15:07:40,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053519058] [2019-12-27 15:07:40,517 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 15:07:40,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:40,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,069 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 15:07:41,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1435008734] [2019-12-27 15:07:41,070 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,071 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,072 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,072 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,073 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,074 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,354 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2019-12-27 15:07:41,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,355 INFO L225 Difference]: With dead ends: 127 [2019-12-27 15:07:41,356 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 15:07:41,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 15:07:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2019-12-27 15:07:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 15:07:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 15:07:41,359 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 15:07:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,360 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 15:07:41,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 15:07:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,361 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,564 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284306, now seen corresponding path program 51 times [2019-12-27 15:07:41,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630678048] [2019-12-27 15:07:41,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,626 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 15:07:41,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630678048] [2019-12-27 15:07:41,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827851923] [2019-12-27 15:07:41,626 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 15:07:41,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:41,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,743 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 15:07:41,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [862162953] [2019-12-27 15:07:41,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,745 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,747 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,748 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,749 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 8 states. [2019-12-27 15:07:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,889 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2019-12-27 15:07:41,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,890 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:41,891 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 15:07:41,891 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 15:07:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 15:07:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2019-12-27 15:07:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 15:07:41,895 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 15:07:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,895 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 15:07:41,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 15:07:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,896 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,099 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 52 times [2019-12-27 15:07:42,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321048951] [2019-12-27 15:07:42,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,164 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 15:07:42,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321048951] [2019-12-27 15:07:42,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668644571] [2019-12-27 15:07:42,165 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 15:07:42,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:42,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,283 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 15:07:42,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946797997] [2019-12-27 15:07:42,284 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,285 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,286 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,286 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,287 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,288 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 8 states. [2019-12-27 15:07:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,386 INFO L93 Difference]: Finished difference Result 117 states and 244 transitions. [2019-12-27 15:07:42,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,388 INFO L225 Difference]: With dead ends: 117 [2019-12-27 15:07:42,388 INFO L226 Difference]: Without dead ends: 116 [2019-12-27 15:07:42,388 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 15:07:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-27 15:07:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2019-12-27 15:07:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:07:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-27 15:07:42,391 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-27 15:07:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,392 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-27 15:07:42,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-27 15:07:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,393 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,596 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 15:07:42,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815834646] [2019-12-27 15:07:42,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,673 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 15:07:42,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815834646] [2019-12-27 15:07:42,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798262536] [2019-12-27 15:07:42,674 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 15:07:42,716 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:42,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,796 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 15:07:42,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:42,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1513290985] [2019-12-27 15:07:42,797 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,798 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 15:07:42,800 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,803 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:42,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:42,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:42,804 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 9 states. [2019-12-27 15:07:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,974 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-27 15:07:42,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:42,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,976 INFO L225 Difference]: With dead ends: 122 [2019-12-27 15:07:42,976 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 15:07:42,976 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 15:07:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 15:07:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-27 15:07:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 15:07:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 15:07:42,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 15:07:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,979 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 15:07:42,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 15:07:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:42,980 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,980 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,181 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-27 15:07:43,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743497532] [2019-12-27 15:07:43,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,309 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 15:07:43,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743497532] [2019-12-27 15:07:43,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932905160] [2019-12-27 15:07:43,310 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 15:07:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,499 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 15:07:43,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:43,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 15:07:43,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [262804088] [2019-12-27 15:07:43,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,501 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 15:07:43,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,503 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:43,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:43,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:43,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:43,504 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-27 15:07:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,542 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-27 15:07:43,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:43,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,544 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:43,545 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:43,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-27 15:07:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:07:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 15:07:43,550 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-27 15:07:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,551 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 15:07:43,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 15:07:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:43,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,552 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,757 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 53 times [2019-12-27 15:07:43,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702383290] [2019-12-27 15:07:43,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,826 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 15:07:43,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702383290] [2019-12-27 15:07:43,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220839910] [2019-12-27 15:07:43,827 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 15:07:43,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:43,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,977 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 15:07:43,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:43,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2142197684] [2019-12-27 15:07:43,977 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,978 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,980 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 15:07:43,980 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,980 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:43,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:43,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:43,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:43,981 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 9 states. [2019-12-27 15:07:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,006 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-27 15:07:44,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,008 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:44,008 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:44,008 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 15:07:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-27 15:07:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:07:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-27 15:07:44,012 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-27 15:07:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,012 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-27 15:07:44,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-27 15:07:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,012 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,012 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,213 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 54 times [2019-12-27 15:07:44,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845401386] [2019-12-27 15:07:44,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,290 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 15:07:44,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845401386] [2019-12-27 15:07:44,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130129865] [2019-12-27 15:07:44,291 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 15:07:44,329 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:44,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:44,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2104969766] [2019-12-27 15:07:44,437 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,438 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,439 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:44,439 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,440 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:44,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:44,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,440 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 9 states. [2019-12-27 15:07:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,485 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-27 15:07:44,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,487 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:07:44,487 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:07:44,488 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 15:07:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:07:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-27 15:07:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:07:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-27 15:07:44,491 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-27 15:07:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,492 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-27 15:07:44,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-27 15:07:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,492 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,696 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 55 times [2019-12-27 15:07:44,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243337371] [2019-12-27 15:07:44,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,769 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 15:07:44,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243337371] [2019-12-27 15:07:44,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701038160] [2019-12-27 15:07:44,769 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 15:07:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,368 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 15:07:45,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [853276119] [2019-12-27 15:07:45,368 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,369 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,371 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:45,371 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,371 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:45,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,372 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 9 states. [2019-12-27 15:07:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,445 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-27 15:07:45,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,447 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:07:45,447 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:07:45,448 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 15:07:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:07:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2019-12-27 15:07:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 15:07:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-27 15:07:45,451 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-27 15:07:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,451 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-27 15:07:45,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-27 15:07:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,451 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,451 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,652 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 56 times [2019-12-27 15:07:45,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155676078] [2019-12-27 15:07:45,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,715 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 15:07:45,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155676078] [2019-12-27 15:07:45,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916898523] [2019-12-27 15:07:45,716 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 15:07:45,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:45,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:45,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,849 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 15:07:45,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [803261651] [2019-12-27 15:07:45,850 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,851 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:45,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,853 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:45,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,853 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 9 states. [2019-12-27 15:07:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,925 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 15:07:45,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,925 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,927 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:07:45,927 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:07:45,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:07:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-27 15:07:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 15:07:45,930 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 15:07:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,931 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 15:07:45,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 15:07:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,931 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:46,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:46,133 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 57 times [2019-12-27 15:07:46,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:46,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974634274] [2019-12-27 15:07:46,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:46,201 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 15:07:46,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974634274] [2019-12-27 15:07:46,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563251536] [2019-12-27 15:07:46,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:07:46,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:46,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:46,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:46,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:46,607 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 15:07:46,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:46,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:46,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [993765806] [2019-12-27 15:07:46,607 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:46,608 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:46,610 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:46,610 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:46,610 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:46,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:46,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:46,611 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 9 states. [2019-12-27 15:07:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:47,047 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:07:47,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:47,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:47,049 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:07:47,049 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:07:47,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:07:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2019-12-27 15:07:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:07:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-27 15:07:47,052 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-27 15:07:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:47,052 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-27 15:07:47,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-27 15:07:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:47,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:47,053 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:47,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,255 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 58 times [2019-12-27 15:07:47,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:47,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820390360] [2019-12-27 15:07:47,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:47,323 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 15:07:47,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820390360] [2019-12-27 15:07:47,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240749960] [2019-12-27 15:07:47,324 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 15:07:47,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:47,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:47,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:47,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,545 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 15:07:47,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:47,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230105165] [2019-12-27 15:07:47,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,546 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,548 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:47,548 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,548 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:47,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:47,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:47,549 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 9 states. [2019-12-27 15:07:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:48,019 INFO L93 Difference]: Finished difference Result 182 states and 419 transitions. [2019-12-27 15:07:48,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:48,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:48,021 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:07:48,021 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:07:48,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=193, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:07:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:07:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2019-12-27 15:07:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-27 15:07:48,025 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-27 15:07:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:48,025 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-27 15:07:48,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-27 15:07:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:48,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:48,026 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,227 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 59 times [2019-12-27 15:07:48,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708297764] [2019-12-27 15:07:48,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,309 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 15:07:48,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708297764] [2019-12-27 15:07:48,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466862810] [2019-12-27 15:07:48,310 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 15:07:48,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:48,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:48,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:48,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,783 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 15:07:49,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:49,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464718707] [2019-12-27 15:07:49,784 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,785 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,786 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:49,787 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,787 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:49,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=151, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:49,787 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 9 states. [2019-12-27 15:07:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,620 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-27 15:07:50,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:50,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,622 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:50,622 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:50,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=117, Invalid=186, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:07:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2019-12-27 15:07:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:07:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-27 15:07:50,626 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-27 15:07:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,627 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-27 15:07:50,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-27 15:07:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:50,627 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,627 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,831 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 60 times [2019-12-27 15:07:50,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347631723] [2019-12-27 15:07:50,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:50,918 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 15:07:50,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347631723] [2019-12-27 15:07:50,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097412654] [2019-12-27 15:07:50,919 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 15:07:50,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:50,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:50,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:50,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,051 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 15:07:51,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:51,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1443365170] [2019-12-27 15:07:51,052 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,052 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,054 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:51,054 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,054 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:51,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:51,055 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 9 states. [2019-12-27 15:07:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,143 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-27 15:07:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,145 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:51,145 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:51,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-27 15:07:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:51,148 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,148 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:51,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:51,149 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,149 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:51,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,350 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 61 times [2019-12-27 15:07:51,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:51,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834041172] [2019-12-27 15:07:51,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,433 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 15:07:51,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834041172] [2019-12-27 15:07:51,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442636000] [2019-12-27 15:07:51,434 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 15:07:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:51,579 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 15:07:51,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:51,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:51,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [515562042] [2019-12-27 15:07:51,580 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:51,581 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:51,583 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:51,583 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:51,583 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:51,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:51,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:51,584 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:51,694 INFO L93 Difference]: Finished difference Result 191 states and 446 transitions. [2019-12-27 15:07:51,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:51,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:51,696 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:07:51,696 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:07:51,696 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 15:07:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:07:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2019-12-27 15:07:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-27 15:07:51,700 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-27 15:07:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:51,701 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-27 15:07:51,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-27 15:07:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:51,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:51,701 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:51,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,902 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 62 times [2019-12-27 15:07:51,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:51,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351997590] [2019-12-27 15:07:51,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,969 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 15:07:51,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351997590] [2019-12-27 15:07:51,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265307597] [2019-12-27 15:07:51,970 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 15:07:52,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:52,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,143 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 15:07:52,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [569651398] [2019-12-27 15:07:52,144 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,145 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,146 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:52,146 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,147 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,147 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 9 states. [2019-12-27 15:07:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:52,269 INFO L93 Difference]: Finished difference Result 193 states and 448 transitions. [2019-12-27 15:07:52,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:52,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:52,271 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:07:52,271 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:07:52,271 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 15:07:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:07:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2019-12-27 15:07:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:52,274 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,274 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:52,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,274 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:52,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:52,475 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 63 times [2019-12-27 15:07:52,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:52,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482832158] [2019-12-27 15:07:52,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:52,540 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 15:07:52,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482832158] [2019-12-27 15:07:52,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832634105] [2019-12-27 15:07:52,541 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 15:07:52,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:52,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:52,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:52,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,726 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 15:07:52,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925975405] [2019-12-27 15:07:52,727 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:52,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,731 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:52,731 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 190 states and 442 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: 190 [2019-12-27 15:07:52,834 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:07:52,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:07:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2019-12-27 15:07:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:07:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 352 transitions. [2019-12-27 15:07:52,838 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 352 transitions. Word has length 13 [2019-12-27 15:07:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:52,838 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 352 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 146 states and 352 transitions. [2019-12-27 15:07:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:52,839 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:52,839 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,042 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 64 times [2019-12-27 15:07:53,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948506474] [2019-12-27 15:07:53,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,119 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 15:07:53,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948506474] [2019-12-27 15:07:53,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858412161] [2019-12-27 15:07:53,120 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 15:07:53,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:53,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,275 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 15:07:53,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1718682446] [2019-12-27 15:07:53,276 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,277 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,279 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,280 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,280 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,280 INFO L87 Difference]: Start difference. First operand 146 states and 352 transitions. Second operand 9 states. [2019-12-27 15:07:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,391 INFO L93 Difference]: Finished difference Result 189 states and 438 transitions. [2019-12-27 15:07:53,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,394 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:07:53,394 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:07:53,394 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 15:07:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:07:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 148. [2019-12-27 15:07:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:53,398 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,398 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:53,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,399 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,399 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,602 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 65 times [2019-12-27 15:07:53,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206093116] [2019-12-27 15:07:53,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,666 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 15:07:53,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206093116] [2019-12-27 15:07:53,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576241430] [2019-12-27 15:07:53,667 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 15:07:53,705 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:53,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,860 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 15:07:53,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1550352120] [2019-12-27 15:07:53,861 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,863 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,864 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,864 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,864 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,865 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,992 INFO L93 Difference]: Finished difference Result 188 states and 437 transitions. [2019-12-27 15:07:53,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,994 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:07:53,994 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:07:53,994 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 15:07:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:07:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 147. [2019-12-27 15:07:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-27 15:07:53,997 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-27 15:07:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,997 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-27 15:07:53,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-27 15:07:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,998 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,199 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 66 times [2019-12-27 15:07:54,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435568994] [2019-12-27 15:07:54,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,269 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 15:07:54,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435568994] [2019-12-27 15:07:54,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004265527] [2019-12-27 15:07:54,270 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 15:07:54,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:54,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,536 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 15:07:54,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1979134717] [2019-12-27 15:07:54,537 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,538 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,541 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,541 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,541 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,542 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 9 states. [2019-12-27 15:07:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,725 INFO L93 Difference]: Finished difference Result 187 states and 433 transitions. [2019-12-27 15:07:54,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,727 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:07:54,728 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:07:54,728 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:07:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2019-12-27 15:07:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:07:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 15:07:54,733 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 15:07:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,734 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 15:07:54,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 15:07:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,735 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,940 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675061, now seen corresponding path program 67 times [2019-12-27 15:07:54,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269385446] [2019-12-27 15:07:54,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,046 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 15:07:55,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269385446] [2019-12-27 15:07:55,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896133449] [2019-12-27 15:07:55,047 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 15:07:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,337 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 15:07:55,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1616074264] [2019-12-27 15:07:55,338 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,339 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,341 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:55,341 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,341 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,342 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 9 states. [2019-12-27 15:07:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,454 INFO L93 Difference]: Finished difference Result 177 states and 411 transitions. [2019-12-27 15:07:55,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,456 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:07:55,456 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:07:55,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:07:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2019-12-27 15:07:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:07:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 353 transitions. [2019-12-27 15:07:55,460 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 353 transitions. Word has length 13 [2019-12-27 15:07:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,460 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 353 transitions. [2019-12-27 15:07:55,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 353 transitions. [2019-12-27 15:07:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,461 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,665 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 68 times [2019-12-27 15:07:55,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074250587] [2019-12-27 15:07:55,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,728 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 15:07:55,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074250587] [2019-12-27 15:07:55,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195783967] [2019-12-27 15:07:55,729 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 15:07:55,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:55,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:55,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,857 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 15:07:55,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038913236] [2019-12-27 15:07:55,858 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,859 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,861 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:55,861 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,861 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,862 INFO L87 Difference]: Start difference. First operand 147 states and 353 transitions. Second operand 9 states. [2019-12-27 15:07:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,981 INFO L93 Difference]: Finished difference Result 173 states and 395 transitions. [2019-12-27 15:07:55,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,983 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:07:55,983 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:07:55,984 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 15:07:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:07:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2019-12-27 15:07:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:07:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:07:55,987 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:07:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,989 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:07:55,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:07:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,990 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,193 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 69 times [2019-12-27 15:07:56,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532704572] [2019-12-27 15:07:56,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,268 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 15:07:56,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532704572] [2019-12-27 15:07:56,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226136771] [2019-12-27 15:07:56,269 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 15:07:56,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:56,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,398 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 15:07:56,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636912969] [2019-12-27 15:07:56,398 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,399 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,401 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:56,401 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,401 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,402 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:07:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,534 INFO L93 Difference]: Finished difference Result 188 states and 437 transitions. [2019-12-27 15:07:56,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,535 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,536 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:07:56,537 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:07:56,537 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 15:07:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:07:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2019-12-27 15:07:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:07:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:07:56,540 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:07:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,541 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:07:56,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:07:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,541 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,742 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 70 times [2019-12-27 15:07:56,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384247044] [2019-12-27 15:07:56,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,818 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 15:07:56,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384247044] [2019-12-27 15:07:56,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731462367] [2019-12-27 15:07:56,818 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 15:07:56,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:56,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,957 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 15:07:56,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1466212832] [2019-12-27 15:07:56,958 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,959 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,960 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:56,960 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,961 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,961 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:07:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,415 INFO L93 Difference]: Finished difference Result 193 states and 448 transitions. [2019-12-27 15:07:57,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,417 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:07:57,417 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:07:57,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:07:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 152. [2019-12-27 15:07:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:07:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:07:57,422 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:07:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,422 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:07:57,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:07:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,423 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,423 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,626 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 71 times [2019-12-27 15:07:57,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829360995] [2019-12-27 15:07:57,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,695 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 15:07:57,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829360995] [2019-12-27 15:07:57,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866799640] [2019-12-27 15:07:57,696 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 15:07:57,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:57,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,836 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 15:07:57,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:57,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1396887519] [2019-12-27 15:07:57,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:57,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:57,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:57,841 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:07:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:57,972 INFO L93 Difference]: Finished difference Result 192 states and 447 transitions. [2019-12-27 15:07:57,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:57,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:57,974 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:07:57,974 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:07:57,975 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 15:07:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:07:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-27 15:07:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:07:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 362 transitions. [2019-12-27 15:07:57,978 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 362 transitions. Word has length 13 [2019-12-27 15:07:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:57,979 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 362 transitions. [2019-12-27 15:07:57,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 362 transitions. [2019-12-27 15:07:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:57,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:57,979 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:58,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:58,180 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 72 times [2019-12-27 15:07:58,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:58,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586110791] [2019-12-27 15:07:58,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:58,249 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 15:07:58,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586110791] [2019-12-27 15:07:58,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399216527] [2019-12-27 15:07:58,250 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 15:07:58,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:58,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:58,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:58,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:58,545 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:07:58,547 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 15:07:58,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:58,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:58,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1057014225] [2019-12-27 15:07:58,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:58,549 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:58,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:58,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:58,551 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:58,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:58,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:58,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:58,552 INFO L87 Difference]: Start difference. First operand 150 states and 362 transitions. Second operand 9 states. [2019-12-27 15:07:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:58,865 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2019-12-27 15:07:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:58,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:58,867 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:07:58,867 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:07:58,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:07:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:07:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:07:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:07:58,871 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:07:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:58,871 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:07:58,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:07:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:58,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:58,872 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:59,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,073 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 73 times [2019-12-27 15:07:59,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:59,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559730522] [2019-12-27 15:07:59,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,144 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 15:07:59,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559730522] [2019-12-27 15:07:59,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577186618] [2019-12-27 15:07:59,144 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 15:07:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:59,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,688 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 15:07:59,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [727492919] [2019-12-27 15:07:59,689 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,690 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,692 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:07:59,692 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,692 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:59,693 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:07:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:59,908 INFO L93 Difference]: Finished difference Result 196 states and 457 transitions. [2019-12-27 15:07:59,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:59,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:59,909 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:07:59,909 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:07:59,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:07:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:07:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:07:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:07:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:07:59,913 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:07:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:59,913 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:07:59,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:07:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:59,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:59,914 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,117 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 74 times [2019-12-27 15:08:00,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306167347] [2019-12-27 15:08:00,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,178 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 15:08:00,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306167347] [2019-12-27 15:08:00,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620345074] [2019-12-27 15:08:00,179 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 15:08:00,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:00,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:00,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:00,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:00,699 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:00,700 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 15:08:00,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:00,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:00,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117225779] [2019-12-27 15:08:00,701 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:00,702 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:00,703 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:00,703 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:00,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:00,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:00,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:00,704 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,838 INFO L93 Difference]: Finished difference Result 199 states and 463 transitions. [2019-12-27 15:08:00,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,840 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:00,841 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:00,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 152. [2019-12-27 15:08:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:00,844 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,845 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:00,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,846 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:01,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,049 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271950, now seen corresponding path program 75 times [2019-12-27 15:08:01,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:01,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765213073] [2019-12-27 15:08:01,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:01,114 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 15:08:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765213073] [2019-12-27 15:08:01,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369484402] [2019-12-27 15:08:01,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:01,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:01,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,243 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 15:08:01,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1359597699] [2019-12-27 15:08:01,244 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,246 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,247 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,247 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,247 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,248 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,373 INFO L93 Difference]: Finished difference Result 191 states and 446 transitions. [2019-12-27 15:08:01,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,381 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:08:01,381 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:08:01,382 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 15:08:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:08:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2019-12-27 15:08:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 358 transitions. [2019-12-27 15:08:01,385 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 358 transitions. Word has length 13 [2019-12-27 15:08:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,385 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 358 transitions. [2019-12-27 15:08:01,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 358 transitions. [2019-12-27 15:08:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,385 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:01,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,589 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:01,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 76 times [2019-12-27 15:08:01,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:01,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73311830] [2019-12-27 15:08:01,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:01,654 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 15:08:01,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73311830] [2019-12-27 15:08:01,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489816649] [2019-12-27 15:08:01,655 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 15:08:01,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:01,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,767 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 15:08:01,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [837955618] [2019-12-27 15:08:01,768 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,769 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,770 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,770 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,770 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,771 INFO L87 Difference]: Start difference. First operand 149 states and 358 transitions. Second operand 9 states. [2019-12-27 15:08:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,889 INFO L93 Difference]: Finished difference Result 195 states and 450 transitions. [2019-12-27 15:08:01,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,891 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:01,891 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:01,892 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 15:08:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2019-12-27 15:08:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:01,894 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,894 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:01,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,895 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,895 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,099 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 77 times [2019-12-27 15:08:02,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110055669] [2019-12-27 15:08:02,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,182 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 15:08:02,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110055669] [2019-12-27 15:08:02,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968192340] [2019-12-27 15:08:02,183 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 15:08:02,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:02,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,308 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 15:08:02,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [77941384] [2019-12-27 15:08:02,309 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,310 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,312 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,312 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,312 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,313 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:02,455 INFO L93 Difference]: Finished difference Result 198 states and 462 transitions. [2019-12-27 15:08:02,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:02,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:02,457 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:02,457 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:02,458 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 15:08:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2019-12-27 15:08:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:08:02,461 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:08:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:02,461 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:08:02,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:08:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:02,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:02,462 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,663 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 78 times [2019-12-27 15:08:02,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149121055] [2019-12-27 15:08:02,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,743 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 15:08:02,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149121055] [2019-12-27 15:08:02,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806997357] [2019-12-27 15:08:02,744 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 15:08:02,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:02,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,885 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 15:08:02,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1639724197] [2019-12-27 15:08:02,886 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,887 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,889 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,889 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,889 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,890 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,014 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2019-12-27 15:08:03,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,016 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:03,016 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:03,016 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 15:08:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2019-12-27 15:08:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:03,020 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,020 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:03,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,021 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,225 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 79 times [2019-12-27 15:08:03,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125042642] [2019-12-27 15:08:03,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,294 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 15:08:03,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125042642] [2019-12-27 15:08:03,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512643009] [2019-12-27 15:08:03,295 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 15:08:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,411 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 15:08:03,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1911584729] [2019-12-27 15:08:03,412 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,414 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,416 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,416 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,417 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,417 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,552 INFO L93 Difference]: Finished difference Result 197 states and 461 transitions. [2019-12-27 15:08:03,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,554 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:03,555 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:03,555 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 15:08:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 150. [2019-12-27 15:08:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 362 transitions. [2019-12-27 15:08:03,558 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 362 transitions. Word has length 13 [2019-12-27 15:08:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,558 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 362 transitions. [2019-12-27 15:08:03,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 362 transitions. [2019-12-27 15:08:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,559 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,760 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 80 times [2019-12-27 15:08:03,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876020284] [2019-12-27 15:08:03,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,830 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 15:08:03,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876020284] [2019-12-27 15:08:03,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129672191] [2019-12-27 15:08:03,831 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 15:08:03,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:03,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:03,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,941 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 15:08:03,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [124133414] [2019-12-27 15:08:03,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,943 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,944 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,944 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,944 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,945 INFO L87 Difference]: Start difference. First operand 150 states and 362 transitions. Second operand 9 states. [2019-12-27 15:08:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,067 INFO L93 Difference]: Finished difference Result 200 states and 464 transitions. [2019-12-27 15:08:04,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,069 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:04,069 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:04,070 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 15:08:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2019-12-27 15:08:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:04,073 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,074 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:04,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,074 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,075 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,278 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884750, now seen corresponding path program 81 times [2019-12-27 15:08:04,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361155328] [2019-12-27 15:08:04,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:04,350 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 15:08:04,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361155328] [2019-12-27 15:08:04,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526681357] [2019-12-27 15:08:04,350 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 15:08:04,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:04,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:04,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:04,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,591 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 15:08:04,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404287319] [2019-12-27 15:08:04,592 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,592 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,594 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,594 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,594 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,595 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,311 INFO L93 Difference]: Finished difference Result 200 states and 467 transitions. [2019-12-27 15:08:05,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,313 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:05,313 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:05,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=246, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 151. [2019-12-27 15:08:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2019-12-27 15:08:05,317 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 13 [2019-12-27 15:08:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,317 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2019-12-27 15:08:05,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2019-12-27 15:08:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,318 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,519 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889400, now seen corresponding path program 82 times [2019-12-27 15:08:05,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625615729] [2019-12-27 15:08:05,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,590 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 15:08:05,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625615729] [2019-12-27 15:08:05,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608582329] [2019-12-27 15:08:05,590 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 15:08:05,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:05,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572119033] [2019-12-27 15:08:05,710 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,711 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,712 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,712 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,713 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand 9 states. [2019-12-27 15:08:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,860 INFO L93 Difference]: Finished difference Result 192 states and 447 transitions. [2019-12-27 15:08:05,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,862 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:05,862 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:05,863 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 15:08:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2019-12-27 15:08:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 15:08:05,866 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 15:08:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,866 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 15:08:05,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 15:08:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,867 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,867 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,069 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889555, now seen corresponding path program 83 times [2019-12-27 15:08:06,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834767361] [2019-12-27 15:08:06,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,130 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 15:08:06,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834767361] [2019-12-27 15:08:06,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797721285] [2019-12-27 15:08:06,131 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 15:08:06,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:06,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,268 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 15:08:06,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1484881823] [2019-12-27 15:08:06,269 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,269 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,271 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,271 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,272 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,272 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 9 states. [2019-12-27 15:08:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,379 INFO L93 Difference]: Finished difference Result 174 states and 408 transitions. [2019-12-27 15:08:06,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,380 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:08:06,381 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:08:06,381 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 15:08:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:08:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2019-12-27 15:08:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:06,384 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,384 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:06,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,385 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,585 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 84 times [2019-12-27 15:08:06,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428725032] [2019-12-27 15:08:06,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,654 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 15:08:06,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428725032] [2019-12-27 15:08:06,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054221447] [2019-12-27 15:08:06,655 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 15:08:06,701 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:06,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,785 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 15:08:06,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [856199537] [2019-12-27 15:08:06,787 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,787 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,790 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 15:08:06,790 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,793 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:08:06,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,794 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,962 INFO L93 Difference]: Finished difference Result 181 states and 412 transitions. [2019-12-27 15:08:06,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,964 INFO L225 Difference]: With dead ends: 181 [2019-12-27 15:08:06,964 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 15:08:06,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 15:08:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 150. [2019-12-27 15:08:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:06,968 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,968 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:06,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,968 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,968 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,169 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 85 times [2019-12-27 15:08:07,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071002875] [2019-12-27 15:08:07,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,238 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 15:08:07,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071002875] [2019-12-27 15:08:07,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405132388] [2019-12-27 15:08:07,239 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 15:08:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:08,125 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 15:08:08,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:08,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:08,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [758258732] [2019-12-27 15:08:08,126 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:08,127 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:08,129 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:08,129 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:08,132 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:08,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:08,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=172, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:08:08,133 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,321 INFO L93 Difference]: Finished difference Result 189 states and 429 transitions. [2019-12-27 15:08:08,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,323 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:08,323 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:08,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=287, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2019-12-27 15:08:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:08,327 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,327 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:08,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,328 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,328 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,529 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 86 times [2019-12-27 15:08:08,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920797707] [2019-12-27 15:08:08,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,598 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 15:08:08,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920797707] [2019-12-27 15:08:08,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005993617] [2019-12-27 15:08:08,599 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 15:08:08,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:08,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:08,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:08,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:08,733 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 15:08:08,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:08,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:08,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [200013123] [2019-12-27 15:08:08,734 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:08,735 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:08,737 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:08,737 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:08,740 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:08,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:08,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:08,741 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,897 INFO L93 Difference]: Finished difference Result 188 states and 428 transitions. [2019-12-27 15:08:08,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,898 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:08:08,898 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:08:08,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:08:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 150. [2019-12-27 15:08:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:08,901 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,901 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:08,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,902 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,902 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:09,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:09,103 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 87 times [2019-12-27 15:08:09,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:09,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526630788] [2019-12-27 15:08:09,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:09,181 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 15:08:09,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526630788] [2019-12-27 15:08:09,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682183947] [2019-12-27 15:08:09,182 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 15:08:09,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:09,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:09,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:09,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:09,625 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 15:08:09,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:09,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:09,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525394297] [2019-12-27 15:08:09,626 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:09,628 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:09,631 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:09,631 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:09,633 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:09,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:09,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:09,634 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:09,833 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-27 15:08:09,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:09,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:09,835 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:09,836 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:09,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2019-12-27 15:08:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:09,840 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:09,841 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:09,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:09,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:09,841 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:10,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,044 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 88 times [2019-12-27 15:08:10,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:10,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851695908] [2019-12-27 15:08:10,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:10,125 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 15:08:10,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851695908] [2019-12-27 15:08:10,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315110630] [2019-12-27 15:08:10,126 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 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 15:08:10,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:10,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:10,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:10,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:11,695 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 15:08:11,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:11,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:11,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1029089229] [2019-12-27 15:08:11,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:11,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:11,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:11,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:11,701 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:11,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:11,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:11,702 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:11,903 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2019-12-27 15:08:11,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:11,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:11,905 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:11,905 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:11,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=287, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:08:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:11,910 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:11,910 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:11,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:11,910 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:11,911 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,114 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 89 times [2019-12-27 15:08:12,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797604663] [2019-12-27 15:08:12,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,184 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 15:08:12,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797604663] [2019-12-27 15:08:12,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299773932] [2019-12-27 15:08:12,185 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 15:08:12,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:12,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,322 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 15:08:12,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:12,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [907742768] [2019-12-27 15:08:12,323 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,324 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,326 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:12,327 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,328 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:12,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:12,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:12,329 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:12,511 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-27 15:08:12,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:12,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:12,512 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:12,512 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:12,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 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 15:08:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 152. [2019-12-27 15:08:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:12,516 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:12,517 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:12,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:12,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:12,517 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,721 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 90 times [2019-12-27 15:08:12,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523808438] [2019-12-27 15:08:12,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,792 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 15:08:12,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523808438] [2019-12-27 15:08:12,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693626487] [2019-12-27 15:08:12,793 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 15:08:12,835 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:12,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,930 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 15:08:12,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:12,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [118994197] [2019-12-27 15:08:12,931 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,934 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:12,934 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,935 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:12,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:12,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:12,936 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,085 INFO L93 Difference]: Finished difference Result 192 states and 438 transitions. [2019-12-27 15:08:13,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,086 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:13,086 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:13,087 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 15:08:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-27 15:08:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:13,091 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,091 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:13,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,092 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,296 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 91 times [2019-12-27 15:08:13,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303367616] [2019-12-27 15:08:13,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,364 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 15:08:13,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303367616] [2019-12-27 15:08:13,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124887197] [2019-12-27 15:08:13,365 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 15:08:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:13,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:13,536 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 15:08:13,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:13,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:13,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [184906522] [2019-12-27 15:08:13,537 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:13,538 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:13,540 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:13,540 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:13,542 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:13,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:13,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:13,543 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,720 INFO L93 Difference]: Finished difference Result 195 states and 441 transitions. [2019-12-27 15:08:13,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,721 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:13,722 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:13,722 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 15:08:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2019-12-27 15:08:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:13,727 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:13,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,727 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:13,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,728 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,932 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 92 times [2019-12-27 15:08:13,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342445074] [2019-12-27 15:08:13,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:14,011 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 15:08:14,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342445074] [2019-12-27 15:08:14,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410284168] [2019-12-27 15:08:14,012 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 15:08:14,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:14,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:14,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:14,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:16,445 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 15:08:16,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:16,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:16,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1992165596] [2019-12-27 15:08:16,446 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:16,447 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:16,449 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:16,449 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:16,451 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:16,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:16,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:16,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:16,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:16,451 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:16,723 INFO L93 Difference]: Finished difference Result 198 states and 453 transitions. [2019-12-27 15:08:16,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:16,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:16,725 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:16,725 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:16,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:08:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:16,729 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:16,729 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:16,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:16,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:16,730 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:16,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,933 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 93 times [2019-12-27 15:08:16,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:16,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623710682] [2019-12-27 15:08:16,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,015 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 15:08:17,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623710682] [2019-12-27 15:08:17,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076681573] [2019-12-27 15:08:17,015 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 15:08:17,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:17,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:17,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:17,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:17,461 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 15:08:17,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:17,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:17,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [635729895] [2019-12-27 15:08:17,462 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:17,463 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:17,464 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:17,464 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:17,466 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:17,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:17,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:17,467 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:17,686 INFO L93 Difference]: Finished difference Result 196 states and 445 transitions. [2019-12-27 15:08:17,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:17,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:17,687 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:17,687 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:17,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:08:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:17,692 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:17,692 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:17,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:17,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:17,692 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:17,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,896 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 94 times [2019-12-27 15:08:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:17,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260078762] [2019-12-27 15:08:17,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,971 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 15:08:17,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260078762] [2019-12-27 15:08:17,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521405769] [2019-12-27 15:08:17,972 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 15:08:18,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:18,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:18,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:18,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:18,148 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 15:08:18,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:18,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:18,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1952412395] [2019-12-27 15:08:18,149 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:18,150 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:18,152 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:18,152 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:18,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:18,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:18,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:18,153 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:18,383 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2019-12-27 15:08:18,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:18,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:18,384 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:08:18,384 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:18,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2019-12-27 15:08:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:18,388 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:18,388 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:18,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:18,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:18,388 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:18,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:18,589 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -578026832, now seen corresponding path program 95 times [2019-12-27 15:08:18,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:18,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805603555] [2019-12-27 15:08:18,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:18,657 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 15:08:18,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805603555] [2019-12-27 15:08:18,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33896356] [2019-12-27 15:08:18,657 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 15:08:18,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:18,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:18,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:18,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:18,807 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 15:08:18,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:18,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:18,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [732312456] [2019-12-27 15:08:18,808 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:18,808 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:18,810 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:18,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:18,811 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:18,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:18,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:18,812 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:19,004 INFO L93 Difference]: Finished difference Result 199 states and 451 transitions. [2019-12-27 15:08:19,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:19,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:19,005 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:19,006 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:19,006 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 15:08:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2019-12-27 15:08:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:19,010 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:19,010 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:19,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:19,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:19,011 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:19,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:19,214 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 96 times [2019-12-27 15:08:19,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:19,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481694378] [2019-12-27 15:08:19,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:19,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481694378] [2019-12-27 15:08:19,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4088339] [2019-12-27 15:08:19,295 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 15:08:19,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:19,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:19,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:19,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:19,452 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 15:08:19,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:19,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:19,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [442258719] [2019-12-27 15:08:19,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:19,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:19,458 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:19,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:19,459 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:19,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:19,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:19,460 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:19,755 INFO L93 Difference]: Finished difference Result 200 states and 455 transitions. [2019-12-27 15:08:19,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:08:19,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:19,757 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:19,757 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:19,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 152. [2019-12-27 15:08:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:19,765 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:19,765 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:19,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:19,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:19,766 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:19,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:19,970 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -578031637, now seen corresponding path program 97 times [2019-12-27 15:08:19,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:19,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401477867] [2019-12-27 15:08:19,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,051 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 15:08:20,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401477867] [2019-12-27 15:08:20,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403407490] [2019-12-27 15:08:20,052 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 15:08:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:20,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:20,217 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 15:08:20,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:20,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:20,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [376147534] [2019-12-27 15:08:20,217 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:20,218 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:20,220 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:20,220 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:20,221 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:20,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:20,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:20,222 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:20,401 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2019-12-27 15:08:20,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:20,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:20,403 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:08:20,403 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:08:20,403 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 15:08:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:08:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2019-12-27 15:08:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:20,407 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:20,407 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:20,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:20,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:20,408 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:20,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,609 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -578031792, now seen corresponding path program 98 times [2019-12-27 15:08:20,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:20,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351667600] [2019-12-27 15:08:20,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,685 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 15:08:20,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351667600] [2019-12-27 15:08:20,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109506110] [2019-12-27 15:08:20,686 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 15:08:20,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:20,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:20,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:20,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:20,826 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 15:08:20,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:20,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:20,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215692134] [2019-12-27 15:08:20,827 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:20,828 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:20,829 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:20,829 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:20,831 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:20,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:20,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:20,832 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:20,976 INFO L93 Difference]: Finished difference Result 182 states and 416 transitions. [2019-12-27 15:08:20,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:20,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:20,977 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:20,977 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:20,978 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 15:08:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2019-12-27 15:08:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 359 transitions. [2019-12-27 15:08:20,981 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 359 transitions. Word has length 13 [2019-12-27 15:08:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:20,981 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 359 transitions. [2019-12-27 15:08:20,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 359 transitions. [2019-12-27 15:08:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:20,982 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:20,982 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:21,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:21,183 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 99 times [2019-12-27 15:08:21,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:21,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733469683] [2019-12-27 15:08:21,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:21,272 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 15:08:21,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733469683] [2019-12-27 15:08:21,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754212980] [2019-12-27 15:08:21,272 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 15:08:21,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:21,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:21,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:21,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:21,397 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 15:08:21,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:21,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:21,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2131570022] [2019-12-27 15:08:21,398 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:21,399 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:21,401 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:21,401 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:21,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:21,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:21,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:21,402 INFO L87 Difference]: Start difference. First operand 150 states and 359 transitions. Second operand 9 states. [2019-12-27 15:08:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:21,561 INFO L93 Difference]: Finished difference Result 192 states and 438 transitions. [2019-12-27 15:08:21,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:21,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:21,562 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:21,562 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:21,563 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 15:08:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:08:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:21,565 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:21,565 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:21,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:21,566 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:21,566 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:21,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:21,767 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 100 times [2019-12-27 15:08:21,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:21,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833117191] [2019-12-27 15:08:21,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:21,832 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 15:08:21,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833117191] [2019-12-27 15:08:21,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834030138] [2019-12-27 15:08:21,832 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 15:08:21,875 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:21,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:21,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:21,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:21,956 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 15:08:21,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:21,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:21,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [641344399] [2019-12-27 15:08:21,957 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:21,958 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:21,959 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:21,959 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:21,960 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:21,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:21,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:21,960 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:22,128 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2019-12-27 15:08:22,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:22,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:22,129 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:22,129 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:22,129 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 15:08:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2019-12-27 15:08:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:22,132 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:22,132 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:22,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:22,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:22,133 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,333 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 101 times [2019-12-27 15:08:22,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417966788] [2019-12-27 15:08:22,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:22,431 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 15:08:22,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417966788] [2019-12-27 15:08:22,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146278499] [2019-12-27 15:08:22,432 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 15:08:22,475 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:22,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:22,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:22,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:22,920 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 15:08:22,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:22,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:22,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1070901453] [2019-12-27 15:08:22,920 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:22,921 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:22,922 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:22,923 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:22,923 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:22,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:22,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:22,924 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,541 INFO L93 Difference]: Finished difference Result 197 states and 452 transitions. [2019-12-27 15:08:23,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:23,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,542 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:23,542 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:23,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 154. [2019-12-27 15:08:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:23,547 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,547 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:23,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,547 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,548 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,748 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 102 times [2019-12-27 15:08:23,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315306387] [2019-12-27 15:08:23,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,810 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 15:08:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315306387] [2019-12-27 15:08:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569406696] [2019-12-27 15:08:23,811 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 15:08:23,851 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:23,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,946 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 15:08:23,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [343085853] [2019-12-27 15:08:23,947 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,949 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,951 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:23,951 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,952 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:23,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,953 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,136 INFO L93 Difference]: Finished difference Result 205 states and 475 transitions. [2019-12-27 15:08:24,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,138 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:08:24,138 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 15:08:24,138 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 15:08:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 15:08:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2019-12-27 15:08:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:24,141 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,141 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:24,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,141 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,342 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 103 times [2019-12-27 15:08:24,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735761136] [2019-12-27 15:08:24,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,421 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 15:08:24,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735761136] [2019-12-27 15:08:24,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065721859] [2019-12-27 15:08:24,421 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 15:08:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,550 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 15:08:24,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2133321617] [2019-12-27 15:08:24,551 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,552 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,554 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:24,554 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,555 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:24,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,555 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,715 INFO L93 Difference]: Finished difference Result 198 states and 453 transitions. [2019-12-27 15:08:24,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,717 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:24,717 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:24,717 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 15:08:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2019-12-27 15:08:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:24,720 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,721 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:24,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,721 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,922 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 104 times [2019-12-27 15:08:24,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198628803] [2019-12-27 15:08:24,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,001 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 15:08:25,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198628803] [2019-12-27 15:08:25,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739453374] [2019-12-27 15:08:25,001 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 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 15:08:25,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:25,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,119 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 15:08:25,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1533250273] [2019-12-27 15:08:25,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,121 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,123 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:25,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,123 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:25,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,124 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,302 INFO L93 Difference]: Finished difference Result 202 states and 466 transitions. [2019-12-27 15:08:25,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:25,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,303 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:08:25,303 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:08:25,304 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 15:08:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:08:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:08:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:25,307 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,308 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:25,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,308 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,509 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 105 times [2019-12-27 15:08:25,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852285013] [2019-12-27 15:08:25,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,577 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 15:08:25,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852285013] [2019-12-27 15:08:25,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293444740] [2019-12-27 15:08:25,578 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 15:08:25,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:25,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,705 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 15:08:25,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1788091001] [2019-12-27 15:08:25,706 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:25,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,709 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:25,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,710 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,891 INFO L93 Difference]: Finished difference Result 199 states and 457 transitions. [2019-12-27 15:08:25,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:25,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,892 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:08:25,892 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:08:25,893 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 15:08:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:08:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:08:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:25,897 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,897 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:25,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,898 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,898 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,101 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -716559942, now seen corresponding path program 106 times [2019-12-27 15:08:26,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219059071] [2019-12-27 15:08:26,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,187 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 15:08:26,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219059071] [2019-12-27 15:08:26,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851493804] [2019-12-27 15:08:26,188 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 15:08:26,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:26,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:26,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,324 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 15:08:26,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [349799363] [2019-12-27 15:08:26,325 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,325 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,326 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:26,327 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,327 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:26,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,328 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,474 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2019-12-27 15:08:26,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,474 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,475 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:08:26,475 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:08:26,475 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 15:08:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:08:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2019-12-27 15:08:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 363 transitions. [2019-12-27 15:08:26,479 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 363 transitions. Word has length 13 [2019-12-27 15:08:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,479 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 363 transitions. [2019-12-27 15:08:26,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 363 transitions. [2019-12-27 15:08:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,480 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,683 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash -721023632, now seen corresponding path program 107 times [2019-12-27 15:08:26,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967618963] [2019-12-27 15:08:26,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,751 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 15:08:26,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967618963] [2019-12-27 15:08:26,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233937162] [2019-12-27 15:08:26,752 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 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 15:08:26,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:26,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:26,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1422057240] [2019-12-27 15:08:26,880 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,881 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,883 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:26,883 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,884 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:26,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,889 INFO L87 Difference]: Start difference. First operand 151 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,034 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-27 15:08:27,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,035 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:27,035 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:27,036 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 15:08:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2019-12-27 15:08:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:27,039 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,039 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:27,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,040 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,241 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 108 times [2019-12-27 15:08:27,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955578462] [2019-12-27 15:08:27,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,317 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 15:08:27,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955578462] [2019-12-27 15:08:27,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573750228] [2019-12-27 15:08:27,318 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:08:27,362 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:27,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,816 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_336 Int)) (and (<= (div (+ (* v_~j~0_336 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 2 v_~j~0_336) 2)) (<= c_~j~0 (+ c_~i~0 v_~j~0_336)))) is different from true [2019-12-27 15:08:27,817 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 15:08:27,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1883008828] [2019-12-27 15:08:27,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,820 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,820 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=148, Unknown=1, NotChecked=26, Total=240 [2019-12-27 15:08:27,821 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:28,002 INFO L93 Difference]: Finished difference Result 206 states and 476 transitions. [2019-12-27 15:08:28,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:28,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:28,003 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:08:28,004 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:08:28,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=253, Unknown=1, NotChecked=36, Total=420 [2019-12-27 15:08:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:08:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2019-12-27 15:08:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:28,008 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:28,008 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:28,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:28,008 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:28,008 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:28,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,209 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 109 times [2019-12-27 15:08:28,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:28,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197630950] [2019-12-27 15:08:28,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,277 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 15:08:28,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197630950] [2019-12-27 15:08:28,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739371483] [2019-12-27 15:08:28,278 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 15:08:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:28,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,312 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 15:08:29,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1541165015] [2019-12-27 15:08:29,312 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,313 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,314 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,315 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,315 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=168, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:29,316 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,995 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2019-12-27 15:08:29,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,997 INFO L225 Difference]: With dead ends: 201 [2019-12-27 15:08:29,997 INFO L226 Difference]: Without dead ends: 200 [2019-12-27 15:08:29,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=134, Invalid=284, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-27 15:08:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2019-12-27 15:08:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:30,000 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,000 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:30,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,001 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,202 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash -721028592, now seen corresponding path program 110 times [2019-12-27 15:08:30,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347711789] [2019-12-27 15:08:30,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,272 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 15:08:30,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347711789] [2019-12-27 15:08:30,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178434153] [2019-12-27 15:08:30,273 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 15:08:30,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:30,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:30,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:30,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,562 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 15:08:32,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876937331] [2019-12-27 15:08:32,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,567 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=166, Unknown=3, NotChecked=0, Total=240 [2019-12-27 15:08:32,567 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:33,424 INFO L93 Difference]: Finished difference Result 202 states and 466 transitions. [2019-12-27 15:08:33,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:33,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:33,426 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:08:33,426 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:08:33,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=136, Invalid=280, Unknown=4, NotChecked=0, Total=420 [2019-12-27 15:08:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:08:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2019-12-27 15:08:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 367 transitions. [2019-12-27 15:08:33,429 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 367 transitions. Word has length 13 [2019-12-27 15:08:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:33,429 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 367 transitions. [2019-12-27 15:08:33,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 367 transitions. [2019-12-27 15:08:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:33,430 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:33,430 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,630 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash -721172587, now seen corresponding path program 111 times [2019-12-27 15:08:33,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206217677] [2019-12-27 15:08:33,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,731 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 15:08:33,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206217677] [2019-12-27 15:08:33,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680993884] [2019-12-27 15:08:33,732 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 15:08:33,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:33,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:33,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:33,865 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 15:08:33,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:33,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:33,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1037435902] [2019-12-27 15:08:33,866 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:33,867 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:33,869 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:33,869 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:33,870 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:33,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:33,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:33,871 INFO L87 Difference]: Start difference. First operand 152 states and 367 transitions. Second operand 9 states. [2019-12-27 15:08:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,037 INFO L93 Difference]: Finished difference Result 200 states and 458 transitions. [2019-12-27 15:08:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,039 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:34,039 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:34,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2019-12-27 15:08:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:34,043 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,043 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:34,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,044 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:34,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,245 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash -721172742, now seen corresponding path program 112 times [2019-12-27 15:08:34,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:34,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918127942] [2019-12-27 15:08:34,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:34,316 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 15:08:34,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918127942] [2019-12-27 15:08:34,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756444954] [2019-12-27 15:08:34,316 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 15:08:34,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:34,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:34,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:34,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,898 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 15:08:34,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505246375] [2019-12-27 15:08:34,899 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,900 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,902 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,902 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,903 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=168, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:34,904 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:35,264 INFO L93 Difference]: Finished difference Result 200 states and 461 transitions. [2019-12-27 15:08:35,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:35,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:35,265 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:08:35,265 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:08:35,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=283, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:08:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2019-12-27 15:08:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:08:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 371 transitions. [2019-12-27 15:08:35,269 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 371 transitions. Word has length 13 [2019-12-27 15:08:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:35,269 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 371 transitions. [2019-12-27 15:08:35,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 371 transitions. [2019-12-27 15:08:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:35,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:35,270 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:35,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,471 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -721177392, now seen corresponding path program 113 times [2019-12-27 15:08:35,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:35,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41985688] [2019-12-27 15:08:35,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,556 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 15:08:35,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41985688] [2019-12-27 15:08:35,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208111173] [2019-12-27 15:08:35,557 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 15:08:35,600 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:35,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:35,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:35,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:35,705 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 15:08:35,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:35,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1159103590] [2019-12-27 15:08:35,706 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:35,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:35,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:35,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:35,710 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:35,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:35,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:35,711 INFO L87 Difference]: Start difference. First operand 153 states and 371 transitions. Second operand 9 states. [2019-12-27 15:08:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:35,877 INFO L93 Difference]: Finished difference Result 189 states and 435 transitions. [2019-12-27 15:08:35,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:35,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:35,878 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:35,878 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:35,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 154. [2019-12-27 15:08:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 15:08:35,882 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 15:08:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:35,882 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 15:08:35,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 15:08:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:35,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:35,883 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,086 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 114 times [2019-12-27 15:08:36,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28326752] [2019-12-27 15:08:36,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,161 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 15:08:36,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28326752] [2019-12-27 15:08:36,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848400745] [2019-12-27 15:08:36,162 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 15:08:36,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:36,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:36,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:36,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,327 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 15:08:36,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:36,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1337090584] [2019-12-27 15:08:36,328 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,329 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,331 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:36,331 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,332 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:36,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:36,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:36,333 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 9 states. [2019-12-27 15:08:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,464 INFO L93 Difference]: Finished difference Result 171 states and 396 transitions. [2019-12-27 15:08:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:36,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,466 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:08:36,466 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 15:08:36,467 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 15:08:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 15:08:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2019-12-27 15:08:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:08:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 363 transitions. [2019-12-27 15:08:36,471 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 363 transitions. Word has length 13 [2019-12-27 15:08:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,471 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 363 transitions. [2019-12-27 15:08:36,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 363 transitions. [2019-12-27 15:08:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:36,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,472 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,674 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 15:08:36,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788226747] [2019-12-27 15:08:36,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,785 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 15:08:36,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788226747] [2019-12-27 15:08:36,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152871203] [2019-12-27 15:08:36,786 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 15:08:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:08:36,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,885 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 15:08:36,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:08:36,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 15:08:36,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [510697585] [2019-12-27 15:08:36,886 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,886 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,888 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 15:08:36,888 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,890 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 16 times. [2019-12-27 15:08:36,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:36,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:08:36,891 INFO L87 Difference]: Start difference. First operand 154 states and 363 transitions. Second operand 9 states. [2019-12-27 15:08:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,913 INFO L93 Difference]: Finished difference Result 203 states and 483 transitions. [2019-12-27 15:08:36,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:36,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,914 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:08:36,914 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:08:36,915 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 15:08:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:08:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-12-27 15:08:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-12-27 15:08:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 468 transitions. [2019-12-27 15:08:36,919 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 468 transitions. Word has length 13 [2019-12-27 15:08:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,919 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 468 transitions. [2019-12-27 15:08:36,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 468 transitions. [2019-12-27 15:08:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:36,924 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,924 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,125 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 115 times [2019-12-27 15:08:37,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695627222] [2019-12-27 15:08:37,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,198 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 15:08:37,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695627222] [2019-12-27 15:08:37,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897332672] [2019-12-27 15:08:37,199 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 15:08:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,346 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 15:08:37,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:37,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975684838] [2019-12-27 15:08:37,347 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,348 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,351 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:08:37,351 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,351 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:37,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:37,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:37,352 INFO L87 Difference]: Start difference. First operand 195 states and 468 transitions. Second operand 10 states. [2019-12-27 15:08:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,382 INFO L93 Difference]: Finished difference Result 214 states and 504 transitions. [2019-12-27 15:08:37,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:37,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,384 INFO L225 Difference]: With dead ends: 214 [2019-12-27 15:08:37,384 INFO L226 Difference]: Without dead ends: 212 [2019-12-27 15:08:37,384 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 15:08:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-27 15:08:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2019-12-27 15:08:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-27 15:08:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2019-12-27 15:08:37,388 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 14 [2019-12-27 15:08:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,388 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2019-12-27 15:08:37,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2019-12-27 15:08:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:37,389 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,389 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,592 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 116 times [2019-12-27 15:08:37,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004520103] [2019-12-27 15:08:37,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,673 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 15:08:37,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004520103] [2019-12-27 15:08:37,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121818859] [2019-12-27 15:08:37,674 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 15:08:37,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:37,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,862 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 15:08:37,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123511826] [2019-12-27 15:08:37,863 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,864 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,867 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:37,867 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,867 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:37,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:37,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:37,869 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand 10 states. [2019-12-27 15:08:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,926 INFO L93 Difference]: Finished difference Result 227 states and 532 transitions. [2019-12-27 15:08:37,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:37,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,928 INFO L225 Difference]: With dead ends: 227 [2019-12-27 15:08:37,929 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 15:08:37,929 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 15:08:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 15:08:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 196. [2019-12-27 15:08:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 15:08:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 476 transitions. [2019-12-27 15:08:37,934 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 476 transitions. Word has length 14 [2019-12-27 15:08:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,935 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 476 transitions. [2019-12-27 15:08:37,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 476 transitions. [2019-12-27 15:08:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:37,936 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,936 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:38,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,137 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 117 times [2019-12-27 15:08:38,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:38,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048663156] [2019-12-27 15:08:38,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,252 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 15:08:38,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048663156] [2019-12-27 15:08:38,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958700481] [2019-12-27 15:08:38,253 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 15:08:38,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:38,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:38,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:38,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:38,549 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 15:08:38,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:38,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:38,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1768582227] [2019-12-27 15:08:38,550 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:38,553 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:38,557 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:38,557 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:38,557 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:38,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:38,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:38,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:38,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:38,559 INFO L87 Difference]: Start difference. First operand 196 states and 476 transitions. Second operand 10 states. [2019-12-27 15:08:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:38,640 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-27 15:08:38,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:38,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:38,641 INFO L225 Difference]: With dead ends: 227 [2019-12-27 15:08:38,641 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 15:08:38,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:08:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 15:08:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 196. [2019-12-27 15:08:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 15:08:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 475 transitions. [2019-12-27 15:08:38,645 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 475 transitions. Word has length 14 [2019-12-27 15:08:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:38,645 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 475 transitions. [2019-12-27 15:08:38,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 475 transitions. [2019-12-27 15:08:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:38,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:38,646 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:38,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:38,850 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 118 times [2019-12-27 15:08:38,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:38,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784414462] [2019-12-27 15:08:38,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:38,923 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 15:08:38,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784414462] [2019-12-27 15:08:38,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053203490] [2019-12-27 15:08:38,924 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 15:08:38,963 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:38,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:38,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:38,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,065 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 15:08:39,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:39,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1756363736] [2019-12-27 15:08:39,066 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,068 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,070 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:39,070 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,070 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:39,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:39,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:39,071 INFO L87 Difference]: Start difference. First operand 196 states and 475 transitions. Second operand 10 states. [2019-12-27 15:08:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,150 INFO L93 Difference]: Finished difference Result 235 states and 551 transitions. [2019-12-27 15:08:39,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,152 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:08:39,152 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 15:08:39,153 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 15:08:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 15:08:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2019-12-27 15:08:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 15:08:39,157 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 15:08:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,157 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 15:08:39,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 15:08:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,158 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,158 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,362 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 119 times [2019-12-27 15:08:39,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758203240] [2019-12-27 15:08:39,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:39,439 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 15:08:39,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758203240] [2019-12-27 15:08:39,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673355167] [2019-12-27 15:08:39,439 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 15:08:39,490 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:39,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:39,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:39,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,617 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 15:08:39,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:39,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304378225] [2019-12-27 15:08:39,617 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,618 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,620 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:39,620 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,620 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:39,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:39,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:39,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:39,621 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 10 states. [2019-12-27 15:08:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,716 INFO L93 Difference]: Finished difference Result 251 states and 586 transitions. [2019-12-27 15:08:39,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,717 INFO L225 Difference]: With dead ends: 251 [2019-12-27 15:08:39,717 INFO L226 Difference]: Without dead ends: 250 [2019-12-27 15:08:39,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-27 15:08:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 199. [2019-12-27 15:08:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 15:08:39,722 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 15:08:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,723 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 15:08:39,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 15:08:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,723 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,723 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,926 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,927 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 120 times [2019-12-27 15:08:39,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670063138] [2019-12-27 15:08:39,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:40,001 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 15:08:40,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670063138] [2019-12-27 15:08:40,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941973650] [2019-12-27 15:08:40,001 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 15:08:40,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:40,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:40,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:40,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:40,274 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 15:08:40,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:40,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:40,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192413476] [2019-12-27 15:08:40,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:40,276 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:40,278 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:40,278 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:40,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:40,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:40,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:40,279 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 10 states. [2019-12-27 15:08:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:40,681 INFO L93 Difference]: Finished difference Result 243 states and 569 transitions. [2019-12-27 15:08:40,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:40,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:40,682 INFO L225 Difference]: With dead ends: 243 [2019-12-27 15:08:40,682 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 15:08:40,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 15:08:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 200. [2019-12-27 15:08:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 15:08:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 491 transitions. [2019-12-27 15:08:40,686 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 491 transitions. Word has length 14 [2019-12-27 15:08:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:40,686 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 491 transitions. [2019-12-27 15:08:40,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 491 transitions. [2019-12-27 15:08:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:40,687 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:40,687 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:40,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,888 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:40,888 INFO L82 PathProgramCache]: Analyzing trace with hash 802742867, now seen corresponding path program 121 times [2019-12-27 15:08:40,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:40,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481892705] [2019-12-27 15:08:40,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:40,963 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 15:08:40,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481892705] [2019-12-27 15:08:40,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886146929] [2019-12-27 15:08:40,964 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 15:08:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:41,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:41,524 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_395 Int)) (and (<= (div (+ (* v_~j~0_395 (- 1)) 1) (- 4)) 1) (<= c_~j~0 (+ v_~j~0_395 c_~i~0)) (<= c_~i~0 (+ v_~j~0_395 1)))) is different from true [2019-12-27 15:08:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2019-12-27 15:08:41,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:41,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:41,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141856306] [2019-12-27 15:08:41,737 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:41,739 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:41,741 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:41,741 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:41,741 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:41,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:41,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=175, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:41,742 INFO L87 Difference]: Start difference. First operand 200 states and 491 transitions. Second operand 10 states. [2019-12-27 15:08:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:41,824 INFO L93 Difference]: Finished difference Result 235 states and 555 transitions. [2019-12-27 15:08:41,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:41,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:41,826 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:08:41,826 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 15:08:41,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=213, Unknown=1, NotChecked=34, Total=380 [2019-12-27 15:08:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 15:08:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 199. [2019-12-27 15:08:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 15:08:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-27 15:08:41,830 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-27 15:08:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:41,830 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-27 15:08:41,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-27 15:08:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:41,831 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:41,831 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:42,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,034 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 122 times [2019-12-27 15:08:42,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:42,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230612713] [2019-12-27 15:08:42,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:42,106 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 15:08:42,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230612713] [2019-12-27 15:08:42,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531971361] [2019-12-27 15:08:42,107 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 15:08:42,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:42,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:42,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:42,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:42,259 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 15:08:42,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:42,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:42,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540773437] [2019-12-27 15:08:42,260 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:42,261 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:42,263 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:42,263 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:42,263 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:42,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:42,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:42,264 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 10 states. [2019-12-27 15:08:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:42,363 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-27 15:08:42,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:42,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:42,365 INFO L225 Difference]: With dead ends: 238 [2019-12-27 15:08:42,365 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 15:08:42,365 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 15:08:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 15:08:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-27 15:08:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:42,369 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:42,369 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:42,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:42,369 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:42,369 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:42,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:42,570 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 123 times [2019-12-27 15:08:42,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:42,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598727396] [2019-12-27 15:08:42,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:42,649 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 15:08:42,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598727396] [2019-12-27 15:08:42,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11110842] [2019-12-27 15:08:42,650 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 15:08:42,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:42,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:42,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:42,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,268 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 15:08:43,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:43,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [202864777] [2019-12-27 15:08:43,269 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,270 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,272 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:43,272 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,272 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:43,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:43,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:43,272 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:43,534 INFO L93 Difference]: Finished difference Result 266 states and 622 transitions. [2019-12-27 15:08:43,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:43,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:43,536 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:08:43,536 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:08:43,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:08:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-27 15:08:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:43,540 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:43,540 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:43,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:43,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:43,540 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:43,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:43,741 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 124 times [2019-12-27 15:08:43,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:43,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995325324] [2019-12-27 15:08:43,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:43,820 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 15:08:43,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995325324] [2019-12-27 15:08:43,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451567261] [2019-12-27 15:08:43,821 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 15:08:43,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:43,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:43,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:43,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:45,403 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 15:08:45,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:45,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:45,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1344987036] [2019-12-27 15:08:45,404 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:45,405 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:45,407 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:45,407 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:45,407 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:45,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:45,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:45,407 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:46,831 INFO L93 Difference]: Finished difference Result 268 states and 627 transitions. [2019-12-27 15:08:46,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:46,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:46,833 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:08:46,834 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:08:46,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=148, Invalid=269, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:08:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 204. [2019-12-27 15:08:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:08:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-27 15:08:46,839 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-27 15:08:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:46,839 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-27 15:08:46,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-27 15:08:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:46,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:46,840 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:47,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,043 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 125 times [2019-12-27 15:08:47,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:47,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786031929] [2019-12-27 15:08:47,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:47,118 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 15:08:47,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786031929] [2019-12-27 15:08:47,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476138346] [2019-12-27 15:08:47,119 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 15:08:47,160 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:47,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:47,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:47,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,584 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_411 Int)) (and (<= (div (+ (* v_~j~0_411 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 2 v_~j~0_411) 1)) (<= c_~j~0 (+ v_~j~0_411 c_~i~0)))) is different from true [2019-12-27 15:08:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-27 15:08:48,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:48,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:48,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1483846838] [2019-12-27 15:08:48,086 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:48,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:48,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:48,088 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:48,088 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:48,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:48,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:48,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=180, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:48,089 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 10 states. [2019-12-27 15:08:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:48,199 INFO L93 Difference]: Finished difference Result 264 states and 621 transitions. [2019-12-27 15:08:48,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:48,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:48,200 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:08:48,201 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:08:48,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=241, Unknown=1, NotChecked=36, Total=420 [2019-12-27 15:08:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:08:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 203. [2019-12-27 15:08:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-27 15:08:48,205 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-27 15:08:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:48,205 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-27 15:08:48,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-27 15:08:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:48,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:48,205 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:48,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:48,406 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 126 times [2019-12-27 15:08:48,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:48,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466200923] [2019-12-27 15:08:48,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:48,481 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 15:08:48,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466200923] [2019-12-27 15:08:48,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905059836] [2019-12-27 15:08:48,481 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 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 15:08:48,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:48,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:48,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:48,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:49,325 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:49,734 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_416 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_416) 1)) (<= (div (+ (* v_~j~0_416 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~j~0_416 (* 2 c_~j~0) 1)))) is different from true [2019-12-27 15:08:49,735 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 15:08:49,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:49,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:49,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1302307207] [2019-12-27 15:08:49,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:49,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:49,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:49,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:49,740 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:49,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:49,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=177, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:08:49,740 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 10 states. [2019-12-27 15:08:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:50,134 INFO L93 Difference]: Finished difference Result 257 states and 604 transitions. [2019-12-27 15:08:50,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:50,134 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:50,135 INFO L225 Difference]: With dead ends: 257 [2019-12-27 15:08:50,135 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 15:08:50,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=146, Invalid=237, Unknown=1, NotChecked=36, Total=420 [2019-12-27 15:08:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 15:08:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 205. [2019-12-27 15:08:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:08:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 510 transitions. [2019-12-27 15:08:50,139 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 510 transitions. Word has length 14 [2019-12-27 15:08:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:50,139 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 510 transitions. [2019-12-27 15:08:50,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 510 transitions. [2019-12-27 15:08:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:50,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:50,140 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:50,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:50,341 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 127 times [2019-12-27 15:08:50,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:50,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162725743] [2019-12-27 15:08:50,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:50,422 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 15:08:50,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162725743] [2019-12-27 15:08:50,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028788288] [2019-12-27 15:08:50,423 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 15:08:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:50,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:50,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:51,374 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 15:08:51,375 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 15:08:51,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:51,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346412939] [2019-12-27 15:08:51,375 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:51,376 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:51,378 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:51,378 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:51,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:51,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:51,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=176, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:08:51,378 INFO L87 Difference]: Start difference. First operand 205 states and 510 transitions. Second operand 10 states. [2019-12-27 15:08:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:51,549 INFO L93 Difference]: Finished difference Result 259 states and 613 transitions. [2019-12-27 15:08:51,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:51,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:51,550 INFO L225 Difference]: With dead ends: 259 [2019-12-27 15:08:51,550 INFO L226 Difference]: Without dead ends: 258 [2019-12-27 15:08:51,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=236, Unknown=2, NotChecked=36, Total=420 [2019-12-27 15:08:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-12-27 15:08:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2019-12-27 15:08:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-27 15:08:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-27 15:08:51,555 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-27 15:08:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:51,555 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-27 15:08:51,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-27 15:08:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:51,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:51,556 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:51,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:51,756 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:51,757 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 128 times [2019-12-27 15:08:51,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:51,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722425476] [2019-12-27 15:08:51,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:51,830 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 15:08:51,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722425476] [2019-12-27 15:08:51,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286297063] [2019-12-27 15:08:51,831 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 15:08:51,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:51,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:51,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:51,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:53,027 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 15:08:53,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:53,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:53,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988255636] [2019-12-27 15:08:53,027 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:53,028 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:53,030 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:53,030 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:53,030 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:53,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:53,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=199, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:08:53,031 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 10 states. [2019-12-27 15:08:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:54,245 INFO L93 Difference]: Finished difference Result 253 states and 598 transitions. [2019-12-27 15:08:54,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:54,246 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:54,246 INFO L225 Difference]: With dead ends: 253 [2019-12-27 15:08:54,246 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 15:08:54,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=153, Invalid=265, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 15:08:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 205. [2019-12-27 15:08:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 15:08:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 510 transitions. [2019-12-27 15:08:54,250 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 510 transitions. Word has length 14 [2019-12-27 15:08:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:54,250 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 510 transitions. [2019-12-27 15:08:54,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 510 transitions. [2019-12-27 15:08:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:54,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:54,251 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:54,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,454 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:54,455 INFO L82 PathProgramCache]: Analyzing trace with hash 834917147, now seen corresponding path program 129 times [2019-12-27 15:08:54,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:54,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916206935] [2019-12-27 15:08:54,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,525 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 15:08:54,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916206935] [2019-12-27 15:08:54,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408890034] [2019-12-27 15:08:54,526 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 15:08:54,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:54,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:54,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:54,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:55,774 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 15:08:55,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:55,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:55,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [182245217] [2019-12-27 15:08:55,775 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:55,776 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:55,778 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:55,778 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:55,779 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:55,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:55,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:55,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=196, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:55,779 INFO L87 Difference]: Start difference. First operand 205 states and 510 transitions. Second operand 10 states. [2019-12-27 15:08:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:56,404 INFO L93 Difference]: Finished difference Result 240 states and 571 transitions. [2019-12-27 15:08:56,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:56,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:56,406 INFO L225 Difference]: With dead ends: 240 [2019-12-27 15:08:56,406 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 15:08:56,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=157, Invalid=261, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 15:08:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2019-12-27 15:08:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 15:08:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-27 15:08:56,410 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-27 15:08:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:56,410 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-27 15:08:56,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-27 15:08:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:56,411 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:56,411 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:56,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,614 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 130 times [2019-12-27 15:08:56,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:56,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754795527] [2019-12-27 15:08:56,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:56,693 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 15:08:56,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754795527] [2019-12-27 15:08:56,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879751360] [2019-12-27 15:08:56,693 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 15:08:56,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:56,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:56,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:56,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:56,839 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 15:08:56,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:56,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:56,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621032364] [2019-12-27 15:08:56,840 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:56,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:56,842 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:56,843 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:56,843 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:56,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:56,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:56,843 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 10 states. [2019-12-27 15:08:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:56,964 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-27 15:08:56,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:56,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:56,965 INFO L225 Difference]: With dead ends: 236 [2019-12-27 15:08:56,965 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 15:08:56,966 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 15:08:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 15:08:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-27 15:08:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:08:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:08:56,969 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:08:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:56,969 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:08:56,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:08:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:56,970 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:56,970 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,170 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 131 times [2019-12-27 15:08:57,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179820501] [2019-12-27 15:08:57,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:57,243 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 15:08:57,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179820501] [2019-12-27 15:08:57,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105814281] [2019-12-27 15:08:57,243 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 15:08:57,286 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:57,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:57,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:57,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:57,413 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 15:08:57,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:57,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:57,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [175142317] [2019-12-27 15:08:57,414 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:57,415 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:57,418 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:57,418 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:57,418 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:57,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:57,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:57,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:57,419 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:08:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:57,574 INFO L93 Difference]: Finished difference Result 266 states and 630 transitions. [2019-12-27 15:08:57,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:57,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:57,575 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:08:57,575 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:08:57,575 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 15:08:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:08:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2019-12-27 15:08:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:08:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:08:57,579 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:08:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:57,579 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:08:57,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:08:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:57,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:57,580 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:57,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:57,781 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 132 times [2019-12-27 15:08:57,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:57,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292448323] [2019-12-27 15:08:57,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:57,860 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 15:08:57,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292448323] [2019-12-27 15:08:57,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078306263] [2019-12-27 15:08:57,861 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 15:08:57,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:57,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:57,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:57,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:58,032 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 15:08:58,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:58,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:58,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1792864965] [2019-12-27 15:08:58,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:58,034 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:58,036 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:58,037 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:58,037 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:58,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:58,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:58,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:58,038 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:08:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:58,202 INFO L93 Difference]: Finished difference Result 282 states and 664 transitions. [2019-12-27 15:08:58,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:58,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:58,204 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:08:58,204 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:08:58,204 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 15:08:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:08:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 209. [2019-12-27 15:08:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:08:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:08:58,208 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:08:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:58,208 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:08:58,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:08:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:58,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:58,209 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:58,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,410 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:58,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 133 times [2019-12-27 15:08:58,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:58,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35091628] [2019-12-27 15:08:58,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,487 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 15:08:58,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35091628] [2019-12-27 15:08:58,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559774888] [2019-12-27 15:08:58,487 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 15:08:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:58,680 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 15:08:58,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:58,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:58,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1786071980] [2019-12-27 15:08:58,681 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:58,682 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:58,684 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:58,684 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:58,684 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:58,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:58,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:58,685 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:08:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:58,834 INFO L93 Difference]: Finished difference Result 279 states and 660 transitions. [2019-12-27 15:08:58,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:58,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:58,836 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:08:58,836 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:08:58,836 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 15:08:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:08:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 208. [2019-12-27 15:08:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:08:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:08:58,841 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:08:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:58,841 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:08:58,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:08:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:58,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:58,842 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,045 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 134 times [2019-12-27 15:08:59,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639604232] [2019-12-27 15:08:59,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:59,120 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 15:08:59,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639604232] [2019-12-27 15:08:59,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260835331] [2019-12-27 15:08:59,120 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 15:08:59,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:59,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:59,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:59,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,301 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 15:08:59,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [708784789] [2019-12-27 15:08:59,301 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,302 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,304 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:59,304 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,304 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:59,305 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:08:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,465 INFO L93 Difference]: Finished difference Result 280 states and 662 transitions. [2019-12-27 15:08:59,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,467 INFO L225 Difference]: With dead ends: 280 [2019-12-27 15:08:59,467 INFO L226 Difference]: Without dead ends: 279 [2019-12-27 15:08:59,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-12-27 15:08:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 210. [2019-12-27 15:08:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:08:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:08:59,471 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:08:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,471 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:08:59,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:08:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:59,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,471 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,672 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 135 times [2019-12-27 15:08:59,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021465008] [2019-12-27 15:08:59,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:59,745 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 15:08:59,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021465008] [2019-12-27 15:08:59,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719418847] [2019-12-27 15:08:59,746 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 15:08:59,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:59,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:59,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:59,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,949 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 15:08:59,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1685402284] [2019-12-27 15:08:59,950 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,951 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,953 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:59,953 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,953 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:59,954 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:00,123 INFO L93 Difference]: Finished difference Result 279 states and 663 transitions. [2019-12-27 15:09:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:00,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:00,125 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:00,125 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:00,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2019-12-27 15:09:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:09:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:09:00,129 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:09:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:00,129 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:09:00,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:09:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:00,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:00,130 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:00,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,331 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 136 times [2019-12-27 15:09:00,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:00,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696690076] [2019-12-27 15:09:00,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:00,411 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 15:09:00,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696690076] [2019-12-27 15:09:00,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36612520] [2019-12-27 15:09:00,411 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 15:09:00,455 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:00,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:00,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:00,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:00,633 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 15:09:00,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:00,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:00,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590887564] [2019-12-27 15:09:00,634 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:00,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:00,636 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:00,636 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:00,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:00,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:00,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:00,637 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:09:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:02,818 INFO L93 Difference]: Finished difference Result 281 states and 667 transitions. [2019-12-27 15:09:02,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:02,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:02,819 INFO L225 Difference]: With dead ends: 281 [2019-12-27 15:09:02,820 INFO L226 Difference]: Without dead ends: 280 [2019-12-27 15:09:02,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=160, Invalid=301, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-12-27 15:09:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2019-12-27 15:09:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:02,824 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:02,824 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:02,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:02,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:02,824 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:03,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,025 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:03,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937432, now seen corresponding path program 137 times [2019-12-27 15:09:03,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:03,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008902137] [2019-12-27 15:09:03,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:03,150 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 15:09:03,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008902137] [2019-12-27 15:09:03,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025514447] [2019-12-27 15:09:03,151 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 15:09:03,218 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:03,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:03,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:03,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:03,522 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 15:09:03,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:03,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:03,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1425242330] [2019-12-27 15:09:03,523 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:03,525 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:03,528 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:03,529 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:03,529 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:03,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:03,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:03,530 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:03,741 INFO L93 Difference]: Finished difference Result 268 states and 638 transitions. [2019-12-27 15:09:03,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:03,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:03,742 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:09:03,742 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:09:03,742 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 15:09:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:09:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 208. [2019-12-27 15:09:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 15:09:03,746 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 15:09:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:03,746 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 15:09:03,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 15:09:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:03,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:03,747 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:03,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:03,950 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 138 times [2019-12-27 15:09:03,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:03,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443949626] [2019-12-27 15:09:03,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,031 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 15:09:04,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443949626] [2019-12-27 15:09:04,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587138958] [2019-12-27 15:09:04,032 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 15:09:04,075 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:09:04,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:04,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:04,240 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 15:09:04,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:04,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:04,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1661666988] [2019-12-27 15:09:04,241 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:04,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:04,244 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:04,245 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:04,245 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:04,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:04,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:04,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:04,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:04,245 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 10 states. [2019-12-27 15:09:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:04,424 INFO L93 Difference]: Finished difference Result 266 states and 630 transitions. [2019-12-27 15:09:04,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:04,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:04,425 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:09:04,425 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:09:04,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:09:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2019-12-27 15:09:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:04,430 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:04,431 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:04,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:04,431 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:04,431 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:04,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:04,632 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 139 times [2019-12-27 15:09:04,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:04,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696629845] [2019-12-27 15:09:04,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,711 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 15:09:04,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696629845] [2019-12-27 15:09:04,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346584414] [2019-12-27 15:09:04,711 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 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 15:09:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:04,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:04,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:08,967 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 15:09:08,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:08,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1559916764] [2019-12-27 15:09:08,968 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:08,969 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:08,971 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:08,971 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:08,972 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:08,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:08,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:08,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=206, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:08,972 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:09,261 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:09:09,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:09,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:09,263 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:09,263 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:09,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=161, Invalid=300, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 210. [2019-12-27 15:09:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:09,267 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:09,268 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:09,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:09,268 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:09,268 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:09,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:09,471 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 140 times [2019-12-27 15:09:09,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:09,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327657285] [2019-12-27 15:09:09,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:09,550 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 15:09:09,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327657285] [2019-12-27 15:09:09,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133085307] [2019-12-27 15:09:09,551 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 15:09:09,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:09,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:09,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:09,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:09,752 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 15:09:09,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:09,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:09,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [413667879] [2019-12-27 15:09:09,753 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:09,754 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:09,756 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:09,756 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:09,756 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:09,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:09,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:09,757 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:09,926 INFO L93 Difference]: Finished difference Result 269 states and 638 transitions. [2019-12-27 15:09:09,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:09,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:09,927 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:09:09,927 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:09:09,928 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 15:09:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:09:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 211. [2019-12-27 15:09:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:09,932 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:09,932 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:09,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:09,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:09,933 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:10,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,133 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 141 times [2019-12-27 15:09:10,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:10,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294560549] [2019-12-27 15:09:10,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:10,208 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 15:09:10,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294560549] [2019-12-27 15:09:10,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620886749] [2019-12-27 15:09:10,209 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 15:09:10,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:10,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:10,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:10,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:10,432 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 15:09:10,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:10,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:10,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1092655677] [2019-12-27 15:09:10,433 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:10,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:10,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:10,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:10,435 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:10,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:10,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:10,436 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:10,598 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2019-12-27 15:09:10,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:10,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:10,600 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:10,600 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:10,600 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 15:09:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 209. [2019-12-27 15:09:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 15:09:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-27 15:09:10,604 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-27 15:09:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:10,604 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-27 15:09:10,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-27 15:09:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:10,605 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:10,605 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:10,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:10,805 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 142 times [2019-12-27 15:09:10,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:10,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734028924] [2019-12-27 15:09:10,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:10,894 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 15:09:10,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734028924] [2019-12-27 15:09:10,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457164248] [2019-12-27 15:09:10,895 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 15:09:10,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:10,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:10,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:10,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:11,116 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 15:09:11,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:11,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:11,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [62406368] [2019-12-27 15:09:11,117 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:11,118 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:11,120 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:11,120 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:11,120 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:11,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:11,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:11,121 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 10 states. [2019-12-27 15:09:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:11,401 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2019-12-27 15:09:11,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:11,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:11,402 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:11,402 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:11,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 211. [2019-12-27 15:09:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:11,406 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:11,406 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:11,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:11,407 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:11,407 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:11,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:11,608 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324632, now seen corresponding path program 143 times [2019-12-27 15:09:11,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:11,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989932771] [2019-12-27 15:09:11,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:11,681 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 15:09:11,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989932771] [2019-12-27 15:09:11,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715173476] [2019-12-27 15:09:11,682 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 15:09:11,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:11,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:11,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:11,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:14,160 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 15:09:14,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:14,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:14,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351422387] [2019-12-27 15:09:14,161 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:14,161 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:14,164 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:14,164 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:14,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:14,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:14,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:14,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:14,165 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:15,680 INFO L93 Difference]: Finished difference Result 267 states and 642 transitions. [2019-12-27 15:09:15,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:15,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:15,680 INFO L225 Difference]: With dead ends: 267 [2019-12-27 15:09:15,681 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 15:09:15,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=166, Invalid=295, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 15:09:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2019-12-27 15:09:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:09:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 529 transitions. [2019-12-27 15:09:15,685 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 529 transitions. Word has length 14 [2019-12-27 15:09:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:15,685 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 529 transitions. [2019-12-27 15:09:15,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 529 transitions. [2019-12-27 15:09:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:15,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:15,686 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:15,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:15,886 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319982, now seen corresponding path program 144 times [2019-12-27 15:09:15,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:15,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126019365] [2019-12-27 15:09:15,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:15,977 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 15:09:15,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126019365] [2019-12-27 15:09:15,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539739922] [2019-12-27 15:09:15,978 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 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 15:09:16,034 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:16,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:16,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:16,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:16,257 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 15:09:16,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:16,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:16,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2116698695] [2019-12-27 15:09:16,257 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:16,258 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:16,260 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:16,260 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:16,260 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:16,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:16,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:16,265 INFO L87 Difference]: Start difference. First operand 210 states and 529 transitions. Second operand 10 states. [2019-12-27 15:09:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:18,451 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2019-12-27 15:09:18,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:18,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:18,452 INFO L225 Difference]: With dead ends: 260 [2019-12-27 15:09:18,452 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 15:09:18,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=299, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:09:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 15:09:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2019-12-27 15:09:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:09:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:09:18,457 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:09:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:18,457 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:09:18,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:09:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:18,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:18,458 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:18,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:18,658 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319827, now seen corresponding path program 145 times [2019-12-27 15:09:18,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:18,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44569734] [2019-12-27 15:09:18,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:18,731 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 15:09:18,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44569734] [2019-12-27 15:09:18,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534639467] [2019-12-27 15:09:18,731 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 15:09:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:18,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:18,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:18,964 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 15:09:18,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:18,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:18,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1648683967] [2019-12-27 15:09:18,965 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:18,966 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:18,968 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:18,969 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:18,969 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:18,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:18,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:18,969 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:09:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:19,117 INFO L93 Difference]: Finished difference Result 242 states and 581 transitions. [2019-12-27 15:09:19,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:19,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:19,119 INFO L225 Difference]: With dead ends: 242 [2019-12-27 15:09:19,119 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 15:09:19,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 15:09:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2019-12-27 15:09:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 15:09:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 520 transitions. [2019-12-27 15:09:19,123 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 520 transitions. Word has length 14 [2019-12-27 15:09:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:19,123 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 520 transitions. [2019-12-27 15:09:19,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 520 transitions. [2019-12-27 15:09:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:19,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:19,124 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:19,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,324 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018186, now seen corresponding path program 146 times [2019-12-27 15:09:19,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:19,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275755825] [2019-12-27 15:09:19,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,403 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 15:09:19,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275755825] [2019-12-27 15:09:19,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128672677] [2019-12-27 15:09:19,404 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 15:09:19,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:19,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:19,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:19,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:19,542 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 15:09:19,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:19,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:19,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088157234] [2019-12-27 15:09:19,543 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:19,544 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:19,545 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:19,545 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:19,545 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:19,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:19,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:19,546 INFO L87 Difference]: Start difference. First operand 208 states and 520 transitions. Second operand 10 states. [2019-12-27 15:09:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:19,691 INFO L93 Difference]: Finished difference Result 229 states and 558 transitions. [2019-12-27 15:09:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:19,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:19,692 INFO L225 Difference]: With dead ends: 229 [2019-12-27 15:09:19,693 INFO L226 Difference]: Without dead ends: 220 [2019-12-27 15:09:19,693 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 15:09:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-27 15:09:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2019-12-27 15:09:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:19,697 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:19,697 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:19,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:19,697 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:19,697 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:19,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,898 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 147 times [2019-12-27 15:09:19,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:19,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489684107] [2019-12-27 15:09:19,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,997 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 15:09:19,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489684107] [2019-12-27 15:09:19,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161393608] [2019-12-27 15:09:19,998 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 15:09:20,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:20,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:20,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:20,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:20,265 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 15:09:20,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:20,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:20,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110769811] [2019-12-27 15:09:20,267 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:20,269 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:20,272 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:20,272 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:20,273 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:20,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:20,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:20,274 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:20,560 INFO L93 Difference]: Finished difference Result 257 states and 614 transitions. [2019-12-27 15:09:20,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:20,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:20,561 INFO L225 Difference]: With dead ends: 257 [2019-12-27 15:09:20,562 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 15:09:20,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 15:09:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 214. [2019-12-27 15:09:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:20,568 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:20,568 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:20,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:20,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:20,570 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:20,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:20,770 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:20,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 148 times [2019-12-27 15:09:20,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:20,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100534400] [2019-12-27 15:09:20,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:20,906 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 15:09:20,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100534400] [2019-12-27 15:09:20,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191702431] [2019-12-27 15:09:20,907 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 15:09:20,957 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:20,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:20,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:20,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:21,591 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 15:09:21,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:21,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:21,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [445305554] [2019-12-27 15:09:21,592 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:21,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:21,594 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:21,594 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:21,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:21,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:21,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=217, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:21,595 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:22,316 INFO L93 Difference]: Finished difference Result 272 states and 647 transitions. [2019-12-27 15:09:22,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:22,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:22,317 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:09:22,317 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:09:22,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=341, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:09:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 215. [2019-12-27 15:09:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:22,321 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:22,321 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:22,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:22,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:22,322 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:22,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,522 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 149 times [2019-12-27 15:09:22,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:22,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094510583] [2019-12-27 15:09:22,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:22,600 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 15:09:22,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094510583] [2019-12-27 15:09:22,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430695349] [2019-12-27 15:09:22,601 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 15:09:22,644 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:22,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:22,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:22,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,773 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 15:09:22,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [753564815] [2019-12-27 15:09:22,774 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,776 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,778 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:22,778 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:22,779 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:22,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:22,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:22,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:22,780 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:22,990 INFO L93 Difference]: Finished difference Result 270 states and 644 transitions. [2019-12-27 15:09:22,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:22,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:22,991 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:09:22,991 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:09:22,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:09:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 214. [2019-12-27 15:09:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:22,996 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:22,996 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:22,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:22,997 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:22,997 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:23,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:23,201 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 150 times [2019-12-27 15:09:23,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:23,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861098962] [2019-12-27 15:09:23,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:23,283 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 15:09:23,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861098962] [2019-12-27 15:09:23,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599127887] [2019-12-27 15:09:23,283 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 15:09:23,326 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:23,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:23,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:23,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:23,442 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 15:09:23,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:23,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:23,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1482693857] [2019-12-27 15:09:23,443 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:23,444 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:23,446 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:23,446 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:23,446 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:23,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:23,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:23,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:23,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:23,447 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:24,520 INFO L93 Difference]: Finished difference Result 275 states and 653 transitions. [2019-12-27 15:09:24,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:24,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:24,521 INFO L225 Difference]: With dead ends: 275 [2019-12-27 15:09:24,521 INFO L226 Difference]: Without dead ends: 274 [2019-12-27 15:09:24,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-27 15:09:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 216. [2019-12-27 15:09:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:24,525 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:24,525 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:24,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:24,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:24,526 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:24,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,728 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 151 times [2019-12-27 15:09:24,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:24,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182646631] [2019-12-27 15:09:24,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:24,811 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 15:09:24,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182646631] [2019-12-27 15:09:24,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983333442] [2019-12-27 15:09:24,812 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 15:09:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:24,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:24,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:25,452 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:09:25,894 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_479 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_479) 2)) (<= c_~j~0 (+ v_~i~0_479 c_~i~0 2)) (<= (div (+ (* v_~i~0_479 (- 1)) 1) (- 3)) 2))) is different from true [2019-12-27 15:09:25,894 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 15:09:25,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:25,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:25,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378853761] [2019-12-27 15:09:25,895 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:25,896 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:25,897 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:25,897 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:25,897 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:25,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:25,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:25,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=188, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:09:25,898 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:26,872 INFO L93 Difference]: Finished difference Result 277 states and 660 transitions. [2019-12-27 15:09:26,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:26,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:26,873 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:09:26,873 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:09:26,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=304, Unknown=3, NotChecked=40, Total=506 [2019-12-27 15:09:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:09:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 215. [2019-12-27 15:09:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:26,878 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:26,878 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:26,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:26,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:26,879 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:27,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:27,079 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 152 times [2019-12-27 15:09:27,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:27,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517628245] [2019-12-27 15:09:27,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:27,157 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 15:09:27,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517628245] [2019-12-27 15:09:27,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685998407] [2019-12-27 15:09:27,157 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 15:09:27,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:27,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:27,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:27,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:27,326 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 15:09:27,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:27,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:27,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [142688459] [2019-12-27 15:09:27,327 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:27,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:27,329 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:27,329 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:27,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:27,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:27,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:27,330 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:27,536 INFO L93 Difference]: Finished difference Result 283 states and 674 transitions. [2019-12-27 15:09:27,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:27,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:27,537 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:09:27,537 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:09:27,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:09:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2019-12-27 15:09:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:27,542 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:27,542 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:27,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:27,543 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:27,543 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:27,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:27,746 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 153 times [2019-12-27 15:09:27,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:27,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771539576] [2019-12-27 15:09:27,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:27,819 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 15:09:27,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771539576] [2019-12-27 15:09:27,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930430520] [2019-12-27 15:09:27,820 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 15:09:27,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:27,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:27,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:27,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:27,986 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 15:09:27,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:27,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:27,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1026876919] [2019-12-27 15:09:27,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:27,987 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:27,989 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:27,989 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:27,989 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:27,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:27,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:27,990 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:28,145 INFO L93 Difference]: Finished difference Result 269 states and 642 transitions. [2019-12-27 15:09:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:28,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:28,146 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:09:28,146 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:09:28,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:09:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 214. [2019-12-27 15:09:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:28,156 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:28,156 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:28,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:28,157 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:28,157 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:28,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:28,357 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 154 times [2019-12-27 15:09:28,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:28,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889320962] [2019-12-27 15:09:28,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:28,432 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 15:09:28,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889320962] [2019-12-27 15:09:28,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902001768] [2019-12-27 15:09:28,432 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 15:09:28,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:28,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:28,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:28,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:29,017 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:09:29,260 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-27 15:09:29,261 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 15:09:29,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:29,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:29,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195560733] [2019-12-27 15:09:29,262 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:29,262 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:29,264 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:29,264 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:29,264 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:29,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:29,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:29,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:29,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:29,265 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:29,834 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:09:29,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:29,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:29,835 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:29,835 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:29,835 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 15:09:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 217. [2019-12-27 15:09:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:29,840 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:29,840 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:29,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:29,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:29,840 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:30,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,041 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 155 times [2019-12-27 15:09:30,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:30,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772810646] [2019-12-27 15:09:30,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:30,124 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 15:09:30,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772810646] [2019-12-27 15:09:30,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677442911] [2019-12-27 15:09:30,125 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 15:09:30,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:30,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:30,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:30,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:34,463 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 15:09:34,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:34,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:34,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605387378] [2019-12-27 15:09:34,464 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:34,464 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:34,466 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:34,466 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:34,466 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:34,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:34,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:34,466 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:38,849 INFO L93 Difference]: Finished difference Result 286 states and 681 transitions. [2019-12-27 15:09:38,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:38,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:38,850 INFO L225 Difference]: With dead ends: 286 [2019-12-27 15:09:38,850 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 15:09:38,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=165, Invalid=338, Unknown=3, NotChecked=0, Total=506 [2019-12-27 15:09:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 15:09:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 216. [2019-12-27 15:09:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:38,855 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:38,855 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:38,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:38,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:38,856 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:39,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:39,057 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 156 times [2019-12-27 15:09:39,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:39,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115348472] [2019-12-27 15:09:39,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:39,194 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 15:09:39,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115348472] [2019-12-27 15:09:39,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444560159] [2019-12-27 15:09:39,195 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 15:09:39,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:39,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:39,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:39,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:39,865 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 15:09:39,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:39,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:39,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1212259963] [2019-12-27 15:09:39,866 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:39,867 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:39,869 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:39,869 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:39,869 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:39,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:39,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:39,870 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:40,302 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2019-12-27 15:09:40,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:40,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:40,303 INFO L225 Difference]: With dead ends: 288 [2019-12-27 15:09:40,303 INFO L226 Difference]: Without dead ends: 287 [2019-12-27 15:09:40,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-27 15:09:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 217. [2019-12-27 15:09:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:40,308 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:40,308 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:40,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:40,308 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:40,308 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:40,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:40,509 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:40,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 157 times [2019-12-27 15:09:40,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:40,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080695957] [2019-12-27 15:09:40,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:40,587 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 15:09:40,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080695957] [2019-12-27 15:09:40,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756762392] [2019-12-27 15:09:40,588 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 15:09:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:40,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:40,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:41,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:41,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:41,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [63875542] [2019-12-27 15:09:41,422 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:41,423 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:41,425 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:41,425 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:41,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:41,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:41,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:41,426 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:41,649 INFO L93 Difference]: Finished difference Result 278 states and 663 transitions. [2019-12-27 15:09:41,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:41,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:41,651 INFO L225 Difference]: With dead ends: 278 [2019-12-27 15:09:41,651 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 15:09:41,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 15:09:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 215. [2019-12-27 15:09:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:41,656 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:41,656 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:41,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:41,657 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:41,657 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:41,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:41,860 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 158 times [2019-12-27 15:09:41,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:41,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121817695] [2019-12-27 15:09:41,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:41,950 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 15:09:41,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121817695] [2019-12-27 15:09:41,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822176205] [2019-12-27 15:09:41,951 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 15:09:42,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:42,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:42,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:42,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:42,119 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 15:09:42,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:42,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:42,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1025474939] [2019-12-27 15:09:42,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:42,121 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:42,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:42,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:42,123 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:42,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:42,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:42,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:42,123 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:42,965 INFO L93 Difference]: Finished difference Result 292 states and 698 transitions. [2019-12-27 15:09:42,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:42,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:42,966 INFO L225 Difference]: With dead ends: 292 [2019-12-27 15:09:42,966 INFO L226 Difference]: Without dead ends: 291 [2019-12-27 15:09:42,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-27 15:09:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 217. [2019-12-27 15:09:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:42,971 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:42,971 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:42,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:42,971 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:42,971 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:43,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,172 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 159 times [2019-12-27 15:09:43,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:43,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309719546] [2019-12-27 15:09:43,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:43,251 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 15:09:43,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309719546] [2019-12-27 15:09:43,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457343961] [2019-12-27 15:09:43,252 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 15:09:43,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:43,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:43,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:43,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:43,508 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 15:09:43,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:43,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:43,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1684588888] [2019-12-27 15:09:43,509 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:43,510 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:43,512 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:43,512 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:43,512 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:43,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:43,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:43,513 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:43,774 INFO L93 Difference]: Finished difference Result 277 states and 658 transitions. [2019-12-27 15:09:43,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:43,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:43,776 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:09:43,776 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:09:43,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:09:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:09:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 216. [2019-12-27 15:09:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:43,786 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:43,786 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:43,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:43,786 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:43,786 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:43,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,987 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789551, now seen corresponding path program 160 times [2019-12-27 15:09:43,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:43,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569698496] [2019-12-27 15:09:43,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:44,122 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 15:09:44,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569698496] [2019-12-27 15:09:44,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579580445] [2019-12-27 15:09:44,123 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 15:09:44,186 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:44,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:44,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:44,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:44,319 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 15:09:44,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:44,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:44,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1114512431] [2019-12-27 15:09:44,320 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:44,321 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:44,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:44,322 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:44,322 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:44,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:44,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:44,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:44,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:44,323 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:44,518 INFO L93 Difference]: Finished difference Result 283 states and 678 transitions. [2019-12-27 15:09:44,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:44,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:44,519 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:09:44,520 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:09:44,520 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 15:09:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:09:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2019-12-27 15:09:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:44,524 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:44,524 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:44,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:44,524 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:44,524 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:44,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,725 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789706, now seen corresponding path program 161 times [2019-12-27 15:09:44,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:44,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569232745] [2019-12-27 15:09:44,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:44,814 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 15:09:44,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569232745] [2019-12-27 15:09:44,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765872222] [2019-12-27 15:09:44,814 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 15:09:44,878 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:44,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:44,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:44,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:45,075 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 15:09:45,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:45,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:45,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [914516002] [2019-12-27 15:09:45,077 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:45,078 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:45,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:45,081 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:45,081 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:45,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:45,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:45,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:45,082 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:45,292 INFO L93 Difference]: Finished difference Result 261 states and 626 transitions. [2019-12-27 15:09:45,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:45,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:45,293 INFO L225 Difference]: With dead ends: 261 [2019-12-27 15:09:45,293 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 15:09:45,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 15:09:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2019-12-27 15:09:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:09:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-27 15:09:45,297 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-27 15:09:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:45,298 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-27 15:09:45,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-27 15:09:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:45,298 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:45,298 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:45,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:45,502 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 162 times [2019-12-27 15:09:45,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:45,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141005245] [2019-12-27 15:09:45,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:45,580 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 15:09:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141005245] [2019-12-27 15:09:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721378855] [2019-12-27 15:09:45,581 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 15:09:45,624 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:45,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:45,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:45,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:45,711 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 15:09:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:45,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:45,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [475989148] [2019-12-27 15:09:45,712 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:45,712 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:45,714 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:45,714 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:45,714 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:45,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:45,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:45,715 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 10 states. [2019-12-27 15:09:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:45,868 INFO L93 Difference]: Finished difference Result 268 states and 637 transitions. [2019-12-27 15:09:45,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:45,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:45,869 INFO L225 Difference]: With dead ends: 268 [2019-12-27 15:09:45,869 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 15:09:45,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 15:09:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 218. [2019-12-27 15:09:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:45,874 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:45,874 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:45,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:45,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:45,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:46,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,075 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 163 times [2019-12-27 15:09:46,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:46,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454111216] [2019-12-27 15:09:46,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,160 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 15:09:46,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454111216] [2019-12-27 15:09:46,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676415477] [2019-12-27 15:09:46,161 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 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 15:09:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:46,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:46,303 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 15:09:46,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:46,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:46,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [525064432] [2019-12-27 15:09:46,304 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:46,305 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:46,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:46,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:46,307 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:46,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:46,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:46,307 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:09:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,500 INFO L93 Difference]: Finished difference Result 287 states and 691 transitions. [2019-12-27 15:09:46,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,501 INFO L225 Difference]: With dead ends: 287 [2019-12-27 15:09:46,501 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 15:09:46,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 15:09:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 217. [2019-12-27 15:09:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:46,506 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,506 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:46,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,507 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,507 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:46,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,708 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168746, now seen corresponding path program 164 times [2019-12-27 15:09:46,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:46,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317372015] [2019-12-27 15:09:46,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,787 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 15:09:46,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317372015] [2019-12-27 15:09:46,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284316814] [2019-12-27 15:09:46,787 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 15:09:46,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:46,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:46,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:46,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:46,941 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 15:09:46,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:46,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:46,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [867881057] [2019-12-27 15:09:46,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:46,942 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:46,944 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:46,944 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:46,945 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:46,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:46,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:46,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:46,945 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:47,178 INFO L93 Difference]: Finished difference Result 279 states and 663 transitions. [2019-12-27 15:09:47,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:47,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:47,179 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:47,179 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:47,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:09:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2019-12-27 15:09:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:47,185 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:47,185 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:47,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:47,186 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:47,186 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:47,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,389 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 165 times [2019-12-27 15:09:47,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:47,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690928450] [2019-12-27 15:09:47,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:47,465 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 15:09:47,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690928450] [2019-12-27 15:09:47,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917134757] [2019-12-27 15:09:47,466 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 15:09:47,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:47,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:47,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:47,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:47,632 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 15:09:47,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:47,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:47,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [639280902] [2019-12-27 15:09:47,633 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:47,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:47,637 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:47,637 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:47,637 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:47,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:47,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:47,638 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:09:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:47,817 INFO L93 Difference]: Finished difference Result 291 states and 702 transitions. [2019-12-27 15:09:47,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:47,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:47,818 INFO L225 Difference]: With dead ends: 291 [2019-12-27 15:09:47,818 INFO L226 Difference]: Without dead ends: 290 [2019-12-27 15:09:47,819 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 15:09:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-12-27 15:09:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 216. [2019-12-27 15:09:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:09:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:09:47,822 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:09:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:47,823 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:09:47,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:09:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:47,823 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:47,823 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,024 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 166 times [2019-12-27 15:09:48,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022267604] [2019-12-27 15:09:48,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:48,100 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 15:09:48,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022267604] [2019-12-27 15:09:48,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110631198] [2019-12-27 15:09:48,101 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 15:09:48,143 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:48,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:48,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:48,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,247 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 15:09:48,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1177758703] [2019-12-27 15:09:48,248 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,249 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,250 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:48,250 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,250 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:48,251 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:09:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,421 INFO L93 Difference]: Finished difference Result 279 states and 662 transitions. [2019-12-27 15:09:48,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:48,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,422 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:09:48,422 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:09:48,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:09:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2019-12-27 15:09:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:48,427 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,427 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:48,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,428 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,631 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 167 times [2019-12-27 15:09:48,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973091201] [2019-12-27 15:09:48,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:48,710 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 15:09:48,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973091201] [2019-12-27 15:09:48,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106954752] [2019-12-27 15:09:48,710 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 15:09:48,763 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:48,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:48,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:48,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,866 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 15:09:48,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [120335050] [2019-12-27 15:09:48,867 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,868 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,870 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:48,870 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,870 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:48,871 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:09:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:49,046 INFO L93 Difference]: Finished difference Result 286 states and 685 transitions. [2019-12-27 15:09:49,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:49,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:49,047 INFO L225 Difference]: With dead ends: 286 [2019-12-27 15:09:49,047 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 15:09:49,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 15:09:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 217. [2019-12-27 15:09:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:49,051 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:49,051 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:49,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:49,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:49,052 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,253 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 168 times [2019-12-27 15:09:49,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834556739] [2019-12-27 15:09:49,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:49,335 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 15:09:49,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834556739] [2019-12-27 15:09:49,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002250061] [2019-12-27 15:09:49,336 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 15:09:49,379 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:49,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:49,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:49,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,495 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 15:09:49,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [816658378] [2019-12-27 15:09:49,496 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,497 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,499 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,499 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,499 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,500 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:49,787 INFO L93 Difference]: Finished difference Result 283 states and 676 transitions. [2019-12-27 15:09:49,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:49,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:49,789 INFO L225 Difference]: With dead ends: 283 [2019-12-27 15:09:49,789 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 15:09:49,789 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 15:09:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 15:09:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 218. [2019-12-27 15:09:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:49,795 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:49,796 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:49,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:49,797 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:49,797 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,998 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317856, now seen corresponding path program 169 times [2019-12-27 15:09:49,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674408835] [2019-12-27 15:09:49,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,087 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 15:09:50,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674408835] [2019-12-27 15:09:50,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241296259] [2019-12-27 15:09:50,087 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 15:09:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,234 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 15:09:50,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [948104336] [2019-12-27 15:09:50,235 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,236 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,238 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:50,238 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,239 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,239 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:09:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,402 INFO L93 Difference]: Finished difference Result 273 states and 657 transitions. [2019-12-27 15:09:50,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,404 INFO L225 Difference]: With dead ends: 273 [2019-12-27 15:09:50,404 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 15:09:50,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 15:09:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2019-12-27 15:09:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 15:09:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 539 transitions. [2019-12-27 15:09:50,408 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 539 transitions. Word has length 14 [2019-12-27 15:09:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,409 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 539 transitions. [2019-12-27 15:09:50,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 539 transitions. [2019-12-27 15:09:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,409 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,409 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,612 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781546, now seen corresponding path program 170 times [2019-12-27 15:09:50,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687317923] [2019-12-27 15:09:50,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,714 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 15:09:50,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687317923] [2019-12-27 15:09:50,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22189414] [2019-12-27 15:09:50,715 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 15:09:50,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:50,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,854 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 15:09:50,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1578960459] [2019-12-27 15:09:50,855 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,856 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,858 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:50,858 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,858 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,858 INFO L87 Difference]: Start difference. First operand 215 states and 539 transitions. Second operand 10 states. [2019-12-27 15:09:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:51,019 INFO L93 Difference]: Finished difference Result 282 states and 668 transitions. [2019-12-27 15:09:51,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:51,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:51,020 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:09:51,021 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:09:51,021 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 15:09:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:09:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2019-12-27 15:09:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:51,025 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:51,025 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:51,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:51,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:51,026 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:51,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,227 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 171 times [2019-12-27 15:09:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:51,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028269694] [2019-12-27 15:09:51,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,322 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 15:09:51,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028269694] [2019-12-27 15:09:51,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262300719] [2019-12-27 15:09:51,323 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 15:09:51,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:51,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:51,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:53,157 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 15:09:53,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:53,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:53,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [640305910] [2019-12-27 15:09:53,157 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:53,158 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:53,160 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:53,160 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:53,160 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:53,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:53,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:53,160 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:09:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:54,494 INFO L93 Difference]: Finished difference Result 292 states and 700 transitions. [2019-12-27 15:09:54,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:54,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:54,495 INFO L225 Difference]: With dead ends: 292 [2019-12-27 15:09:54,495 INFO L226 Difference]: Without dead ends: 291 [2019-12-27 15:09:54,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=168, Invalid=336, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-27 15:09:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 217. [2019-12-27 15:09:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:09:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:09:54,500 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:09:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:54,500 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:09:54,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:09:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:54,501 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:54,501 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,703 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786351, now seen corresponding path program 172 times [2019-12-27 15:09:54,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981593359] [2019-12-27 15:09:54,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:54,802 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 15:09:54,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981593359] [2019-12-27 15:09:54,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560800593] [2019-12-27 15:09:54,803 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 15:09:54,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:54,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:54,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:54,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:55,902 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 15:09:55,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:55,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:55,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2082433621] [2019-12-27 15:09:55,903 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:55,904 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:55,905 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:55,905 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:55,906 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:55,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:55,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:55,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:55,906 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:09:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:58,591 INFO L93 Difference]: Finished difference Result 282 states and 672 transitions. [2019-12-27 15:09:58,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:58,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:58,592 INFO L225 Difference]: With dead ends: 282 [2019-12-27 15:09:58,593 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 15:09:58,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=168, Invalid=336, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 15:09:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2019-12-27 15:09:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:09:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:09:58,597 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:09:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:58,597 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:09:58,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:09:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:58,598 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:58,598 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:58,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:58,798 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786506, now seen corresponding path program 173 times [2019-12-27 15:09:58,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:58,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696461633] [2019-12-27 15:09:58,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:58,877 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 15:09:58,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696461633] [2019-12-27 15:09:58,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081252037] [2019-12-27 15:09:58,878 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 15:09:58,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:58,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:58,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:58,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:00,808 WARN L192 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:00,809 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 15:10:00,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:00,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:00,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828307999] [2019-12-27 15:10:00,810 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:00,810 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:00,812 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:00,812 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:00,812 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:00,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:00,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:00,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=209, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:00,813 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:01,396 INFO L93 Difference]: Finished difference Result 279 states and 666 transitions. [2019-12-27 15:10:01,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:01,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:01,397 INFO L225 Difference]: With dead ends: 279 [2019-12-27 15:10:01,397 INFO L226 Difference]: Without dead ends: 278 [2019-12-27 15:10:01,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=171, Invalid=334, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:10:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-12-27 15:10:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 216. [2019-12-27 15:10:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 15:10:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-27 15:10:01,401 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-27 15:10:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:01,402 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-27 15:10:01,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-27 15:10:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:01,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:01,402 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:01,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,604 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930501, now seen corresponding path program 174 times [2019-12-27 15:10:01,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:01,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447003984] [2019-12-27 15:10:01,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:01,693 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 15:10:01,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447003984] [2019-12-27 15:10:01,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875514165] [2019-12-27 15:10:01,694 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 15:10:01,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:01,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:01,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:01,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:01,845 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 15:10:01,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:01,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:01,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1752873446] [2019-12-27 15:10:01,845 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:01,846 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:01,848 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:01,848 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:01,848 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:01,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:01,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:01,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:01,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:01,849 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 10 states. [2019-12-27 15:10:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,037 INFO L93 Difference]: Finished difference Result 280 states and 665 transitions. [2019-12-27 15:10:02,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,043 INFO L225 Difference]: With dead ends: 280 [2019-12-27 15:10:02,043 INFO L226 Difference]: Without dead ends: 279 [2019-12-27 15:10:02,043 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 15:10:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-12-27 15:10:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 218. [2019-12-27 15:10:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:02,046 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,046 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:02,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,047 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,047 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:02,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,247 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930656, now seen corresponding path program 175 times [2019-12-27 15:10:02,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:02,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410475922] [2019-12-27 15:10:02,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:02,328 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 15:10:02,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410475922] [2019-12-27 15:10:02,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532803917] [2019-12-27 15:10:02,329 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 15:10:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:02,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:02,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:02,640 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 15:10:02,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:02,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:02,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [125209911] [2019-12-27 15:10:02,641 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:02,642 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:02,644 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:02,644 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:02,644 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:02,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:02,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:02,645 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,859 INFO L93 Difference]: Finished difference Result 277 states and 661 transitions. [2019-12-27 15:10:02,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,860 INFO L225 Difference]: With dead ends: 277 [2019-12-27 15:10:02,860 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 15:10:02,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 15:10:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2019-12-27 15:10:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 15:10:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-27 15:10:02,864 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-27 15:10:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,864 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-27 15:10:02,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-27 15:10:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,865 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,068 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935306, now seen corresponding path program 176 times [2019-12-27 15:10:03,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225774501] [2019-12-27 15:10:03,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,147 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 15:10:03,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225774501] [2019-12-27 15:10:03,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390510656] [2019-12-27 15:10:03,147 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 15:10:03,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:03,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:03,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,313 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 15:10:03,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [966106486] [2019-12-27 15:10:03,314 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,314 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,316 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:03,316 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,316 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:03,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,317 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 10 states. [2019-12-27 15:10:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:03,501 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2019-12-27 15:10:03,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:03,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:03,502 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:03,502 INFO L226 Difference]: Without dead ends: 261 [2019-12-27 15:10:03,502 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 15:10:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-12-27 15:10:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 218. [2019-12-27 15:10:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 15:10:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-27 15:10:03,507 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-27 15:10:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:03,507 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-27 15:10:03,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-27 15:10:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:03,507 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:03,507 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,709 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 177 times [2019-12-27 15:10:03,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610983656] [2019-12-27 15:10:03,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,786 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 15:10:03,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610983656] [2019-12-27 15:10:03,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544151575] [2019-12-27 15:10:03,787 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 15:10:03,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:03,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:03,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,957 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 15:10:03,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [191968757] [2019-12-27 15:10:03,957 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,958 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,960 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:03,960 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,960 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:03,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,961 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 10 states. [2019-12-27 15:10:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,124 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-27 15:10:04,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:04,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,126 INFO L225 Difference]: With dead ends: 237 [2019-12-27 15:10:04,126 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 15:10:04,126 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 15:10:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 15:10:04,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-27 15:10:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:10:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-27 15:10:04,131 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-27 15:10:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,131 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-27 15:10:04,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-27 15:10:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:04,132 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:04,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,334 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 178 times [2019-12-27 15:10:04,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:04,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614334037] [2019-12-27 15:10:04,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:04,410 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 15:10:04,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614334037] [2019-12-27 15:10:04,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421636772] [2019-12-27 15:10:04,411 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 15:10:04,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:04,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:04,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:04,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:04,595 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 15:10:04,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:04,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:04,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2040879125] [2019-12-27 15:10:04,596 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:04,597 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:04,604 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 56 transitions. [2019-12-27 15:10:04,604 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:04,610 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 18 times. [2019-12-27 15:10:04,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:04,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:04,611 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 10 states. [2019-12-27 15:10:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,920 INFO L93 Difference]: Finished difference Result 235 states and 574 transitions. [2019-12-27 15:10:04,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:04,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,922 INFO L225 Difference]: With dead ends: 235 [2019-12-27 15:10:04,922 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 15:10:04,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 15:10:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2019-12-27 15:10:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:04,942 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,943 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:04,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:04,944 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,145 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 179 times [2019-12-27 15:10:05,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308555359] [2019-12-27 15:10:05,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,251 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 15:10:05,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308555359] [2019-12-27 15:10:05,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975526753] [2019-12-27 15:10:05,251 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 15:10:05,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:05,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:05,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:07,247 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 15:10:07,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:07,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:07,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [889081685] [2019-12-27 15:10:07,248 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:07,248 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:07,251 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:07,251 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:07,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:07,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:07,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=224, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:10:07,255 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:07,729 INFO L93 Difference]: Finished difference Result 249 states and 603 transitions. [2019-12-27 15:10:07,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:07,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:07,730 INFO L225 Difference]: With dead ends: 249 [2019-12-27 15:10:07,730 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 15:10:07,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=166, Invalid=383, Unknown=3, NotChecked=0, Total=552 [2019-12-27 15:10:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 15:10:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 211. [2019-12-27 15:10:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:07,735 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:07,735 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:07,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:07,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:07,736 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:07,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:07,939 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 180 times [2019-12-27 15:10:07,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:07,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759607327] [2019-12-27 15:10:07,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,017 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 15:10:08,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759607327] [2019-12-27 15:10:08,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839988924] [2019-12-27 15:10:08,018 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 15:10:08,069 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:08,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:08,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:08,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:08,217 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 15:10:08,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:08,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:08,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [730739098] [2019-12-27 15:10:08,218 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:08,219 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:08,223 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:08,223 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:08,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:08,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:08,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:08,227 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:10:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:08,461 INFO L93 Difference]: Finished difference Result 248 states and 602 transitions. [2019-12-27 15:10:08,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:08,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:08,462 INFO L225 Difference]: With dead ends: 248 [2019-12-27 15:10:08,462 INFO L226 Difference]: Without dead ends: 247 [2019-12-27 15:10:08,463 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 15:10:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-27 15:10:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2019-12-27 15:10:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:08,467 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:08,467 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:08,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:08,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:08,468 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:08,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:08,668 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 181 times [2019-12-27 15:10:08,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:08,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973115449] [2019-12-27 15:10:08,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,745 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 15:10:08,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973115449] [2019-12-27 15:10:08,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683969594] [2019-12-27 15:10:08,746 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 15:10:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:08,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:08,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:09,752 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 15:10:09,781 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 15:10:09,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:09,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:09,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077449599] [2019-12-27 15:10:09,782 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:09,783 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:09,785 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:09,785 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:09,787 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:09,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:09,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=222, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:09,788 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:10,422 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2019-12-27 15:10:10,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:10,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:10,423 INFO L225 Difference]: With dead ends: 256 [2019-12-27 15:10:10,423 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 15:10:10,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=169, Invalid=380, Unknown=3, NotChecked=0, Total=552 [2019-12-27 15:10:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 15:10:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 212. [2019-12-27 15:10:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:10:10,427 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:10:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:10,427 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:10:10,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:10:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:10,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:10,428 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:10,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:10,629 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 182 times [2019-12-27 15:10:10,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:10,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877239721] [2019-12-27 15:10:10,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:10,710 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 15:10:10,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877239721] [2019-12-27 15:10:10,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327765090] [2019-12-27 15:10:10,710 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 15:10:10,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:10,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:10,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:10,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:12,395 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:12,396 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 15:10:12,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:12,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:12,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487780212] [2019-12-27 15:10:12,397 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:12,397 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:12,400 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:12,400 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:12,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:12,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:12,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=221, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:12,402 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:10:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:12,872 INFO L93 Difference]: Finished difference Result 255 states and 614 transitions. [2019-12-27 15:10:12,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:12,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:12,874 INFO L225 Difference]: With dead ends: 255 [2019-12-27 15:10:12,874 INFO L226 Difference]: Without dead ends: 254 [2019-12-27 15:10:12,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=382, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:10:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-27 15:10:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 211. [2019-12-27 15:10:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:12,877 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:12,877 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:12,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:12,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:12,878 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:13,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,079 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 183 times [2019-12-27 15:10:13,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:13,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554551940] [2019-12-27 15:10:13,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:13,158 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 15:10:13,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554551940] [2019-12-27 15:10:13,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964053159] [2019-12-27 15:10:13,159 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 15:10:13,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:13,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:13,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:13,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:13,325 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 15:10:13,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:13,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:13,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994056056] [2019-12-27 15:10:13,326 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:13,326 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:13,329 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:13,329 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:13,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:13,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:13,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:13,331 INFO L87 Difference]: Start difference. First operand 211 states and 533 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 265 states and 635 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: 265 [2019-12-27 15:10:13,578 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 15:10:13,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 15:10:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2019-12-27 15:10:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:10:13,581 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:10:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:13,581 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:10:13,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:10:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:13,582 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:13,582 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:13,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:13,783 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash -591352520, now seen corresponding path program 184 times [2019-12-27 15:10:13,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:13,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790983948] [2019-12-27 15:10:13,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:13,864 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 15:10:13,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790983948] [2019-12-27 15:10:13,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905681176] [2019-12-27 15:10:13,865 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:10:13,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:13,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:13,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:13,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:14,025 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 15:10:14,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:14,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:14,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1450019123] [2019-12-27 15:10:14,025 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:14,026 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:14,028 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:14,028 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:14,030 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:14,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:14,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:14,031 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:10:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:14,258 INFO L93 Difference]: Finished difference Result 250 states and 603 transitions. [2019-12-27 15:10:14,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:14,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:14,260 INFO L225 Difference]: With dead ends: 250 [2019-12-27 15:10:14,260 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:14,260 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 15:10:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2019-12-27 15:10:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:14,264 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:14,264 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:14,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:14,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:14,265 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:14,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:14,466 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 185 times [2019-12-27 15:10:14,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:14,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549893607] [2019-12-27 15:10:14,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:14,546 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 15:10:14,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549893607] [2019-12-27 15:10:14,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699405932] [2019-12-27 15:10:14,547 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 15:10:14,590 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:10:14,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:14,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:14,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:14,722 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 15:10:14,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:14,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:14,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [326172906] [2019-12-27 15:10:14,723 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:14,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:14,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:14,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:14,728 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:14,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:14,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:14,729 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:15,225 INFO L93 Difference]: Finished difference Result 262 states and 624 transitions. [2019-12-27 15:10:15,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:15,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:15,227 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:15,227 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 15:10:15,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 15:10:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 213. [2019-12-27 15:10:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-27 15:10:15,232 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-27 15:10:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:15,232 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-27 15:10:15,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-27 15:10:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:15,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:15,233 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:15,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:15,433 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 186 times [2019-12-27 15:10:15,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:15,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207658500] [2019-12-27 15:10:15,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:15,523 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 15:10:15,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207658500] [2019-12-27 15:10:15,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913557760] [2019-12-27 15:10:15,523 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 15:10:15,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:15,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:15,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:15,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:24,429 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 15:10:24,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:24,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:24,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [15544477] [2019-12-27 15:10:24,430 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:24,430 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:24,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:24,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:24,434 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:24,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:24,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:24,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:24,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:24,435 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 10 states. [2019-12-27 15:10:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:37,657 INFO L93 Difference]: Finished difference Result 262 states and 629 transitions. [2019-12-27 15:10:37,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:10:37,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:37,658 INFO L225 Difference]: With dead ends: 262 [2019-12-27 15:10:37,658 INFO L226 Difference]: Without dead ends: 261 [2019-12-27 15:10:37,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=199, Invalid=444, Unknown=7, NotChecked=0, Total=650 [2019-12-27 15:10:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-12-27 15:10:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 212. [2019-12-27 15:10:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:10:37,662 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:10:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:37,662 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:10:37,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:10:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:37,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:37,663 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:37,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:37,864 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 187 times [2019-12-27 15:10:37,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:37,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749269674] [2019-12-27 15:10:37,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:37,948 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 15:10:37,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749269674] [2019-12-27 15:10:37,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639007492] [2019-12-27 15:10:37,949 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 15:10:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:37,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:37,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:39,757 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 15:10:39,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:39,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:39,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [978041182] [2019-12-27 15:10:39,758 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:39,758 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:39,761 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:39,761 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:39,762 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:39,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:39,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=219, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:39,763 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:10:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:40,606 INFO L93 Difference]: Finished difference Result 270 states and 646 transitions. [2019-12-27 15:10:40,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:40,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:40,608 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:10:40,608 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:10:40,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=168, Invalid=382, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:10:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:10:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2019-12-27 15:10:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 540 transitions. [2019-12-27 15:10:40,612 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 540 transitions. Word has length 14 [2019-12-27 15:10:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:40,612 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 540 transitions. [2019-12-27 15:10:40,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 540 transitions. [2019-12-27 15:10:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:40,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:40,613 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:40,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:40,814 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 188 times [2019-12-27 15:10:40,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:40,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867923538] [2019-12-27 15:10:40,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:40,903 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 15:10:40,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867923538] [2019-12-27 15:10:40,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311695949] [2019-12-27 15:10:40,904 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 15:10:40,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:40,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:40,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:40,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:44,115 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 15:10:44,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:44,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:44,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1595283852] [2019-12-27 15:10:44,116 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:44,117 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:44,119 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:44,120 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:44,121 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:44,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:44,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:44,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=221, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:10:44,121 INFO L87 Difference]: Start difference. First operand 213 states and 540 transitions. Second operand 10 states. [2019-12-27 15:10:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:45,937 INFO L93 Difference]: Finished difference Result 260 states and 624 transitions. [2019-12-27 15:10:45,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:45,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:45,939 INFO L225 Difference]: With dead ends: 260 [2019-12-27 15:10:45,939 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 15:10:45,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=167, Invalid=379, Unknown=6, NotChecked=0, Total=552 [2019-12-27 15:10:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 15:10:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2019-12-27 15:10:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:10:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:10:45,943 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:10:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:45,943 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:10:45,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:10:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:45,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:45,944 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:46,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:46,145 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash -595965165, now seen corresponding path program 189 times [2019-12-27 15:10:46,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:46,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276470330] [2019-12-27 15:10:46,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:46,236 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 15:10:46,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276470330] [2019-12-27 15:10:46,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859386219] [2019-12-27 15:10:46,237 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 15:10:46,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:10:46,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:46,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:10:46,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:46,370 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 15:10:46,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:46,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:46,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150684716] [2019-12-27 15:10:46,370 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:46,371 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:46,374 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:46,374 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:46,375 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:46,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:46,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:46,376 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:10:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:46,592 INFO L93 Difference]: Finished difference Result 278 states and 662 transitions. [2019-12-27 15:10:46,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:46,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:46,593 INFO L225 Difference]: With dead ends: 278 [2019-12-27 15:10:46,593 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 15:10:46,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 15:10:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 213. [2019-12-27 15:10:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:10:46,598 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:10:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:46,598 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:10:46,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:10:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:46,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:46,599 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:46,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:46,800 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 190 times [2019-12-27 15:10:46,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:46,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897148376] [2019-12-27 15:10:46,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:46,892 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 15:10:46,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897148376] [2019-12-27 15:10:46,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640073508] [2019-12-27 15:10:46,893 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 15:10:46,936 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:46,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:46,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:46,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:48,537 WARN L192 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:10:48,538 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 15:10:48,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:48,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:48,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1095795140] [2019-12-27 15:10:48,539 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:48,539 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:48,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:48,542 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:48,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:48,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:48,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:48,544 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:10:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:50,250 INFO L93 Difference]: Finished difference Result 270 states and 640 transitions. [2019-12-27 15:10:50,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:50,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:50,251 INFO L225 Difference]: With dead ends: 270 [2019-12-27 15:10:50,251 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 15:10:50,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=182, Invalid=415, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:10:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 15:10:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2019-12-27 15:10:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:10:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:10:50,256 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:10:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:50,257 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:10:50,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:10:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:50,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:50,257 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:50,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:50,461 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 191 times [2019-12-27 15:10:50,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:50,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532432398] [2019-12-27 15:10:50,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:50,544 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 15:10:50,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532432398] [2019-12-27 15:10:50,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366143376] [2019-12-27 15:10:50,545 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 15:10:50,585 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:50,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:50,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:50,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:51,146 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 15:10:51,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:51,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:51,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [955973188] [2019-12-27 15:10:51,146 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:51,147 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:51,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:51,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:51,150 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:51,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:51,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:51,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=224, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:51,151 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:10:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:51,401 INFO L93 Difference]: Finished difference Result 274 states and 654 transitions. [2019-12-27 15:10:51,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:51,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:51,403 INFO L225 Difference]: With dead ends: 274 [2019-12-27 15:10:51,403 INFO L226 Difference]: Without dead ends: 273 [2019-12-27 15:10:51,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=383, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-12-27 15:10:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2019-12-27 15:10:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:10:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:10:51,407 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:10:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:51,408 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:10:51,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:10:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:51,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:51,408 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:51,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:51,609 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash -595970125, now seen corresponding path program 192 times [2019-12-27 15:10:51,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:51,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988523243] [2019-12-27 15:10:51,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:51,688 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 15:10:51,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988523243] [2019-12-27 15:10:51,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959615700] [2019-12-27 15:10:51,689 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 15:10:51,732 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:51,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:51,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:51,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:51,848 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 15:10:51,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:51,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:51,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [263495099] [2019-12-27 15:10:51,849 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:51,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:51,853 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:51,853 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:51,854 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:51,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:51,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:51,854 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:10:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:52,053 INFO L93 Difference]: Finished difference Result 250 states and 602 transitions. [2019-12-27 15:10:52,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:52,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:52,054 INFO L225 Difference]: With dead ends: 250 [2019-12-27 15:10:52,054 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:52,055 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 15:10:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 210. [2019-12-27 15:10:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:10:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:10:52,059 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:10:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:52,059 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:10:52,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:10:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:52,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:52,059 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:52,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:52,260 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -734344360, now seen corresponding path program 193 times [2019-12-27 15:10:52,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:52,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957817636] [2019-12-27 15:10:52,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:52,338 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 15:10:52,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957817636] [2019-12-27 15:10:52,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640576335] [2019-12-27 15:10:52,339 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 15:10:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:52,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:52,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:52,503 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 15:10:52,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:52,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:52,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [103138834] [2019-12-27 15:10:52,504 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:52,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:52,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:52,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:52,509 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:52,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:52,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:52,509 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 10 states. [2019-12-27 15:10:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:52,755 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2019-12-27 15:10:52,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:52,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:52,756 INFO L225 Difference]: With dead ends: 255 [2019-12-27 15:10:52,756 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 15:10:52,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 15:10:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 214. [2019-12-27 15:10:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:10:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 542 transitions. [2019-12-27 15:10:52,761 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 542 transitions. Word has length 14 [2019-12-27 15:10:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:52,761 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 542 transitions. [2019-12-27 15:10:52,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 542 transitions. [2019-12-27 15:10:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:52,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:52,761 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:52,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:52,962 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 194 times [2019-12-27 15:10:52,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:52,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061714336] [2019-12-27 15:10:52,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:53,063 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 15:10:53,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061714336] [2019-12-27 15:10:53,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455760425] [2019-12-27 15:10:53,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:10:53,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:53,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:53,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:53,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:59,489 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 15:10:59,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:59,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:59,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896313579] [2019-12-27 15:10:59,490 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:59,490 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:59,492 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:59,493 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:59,493 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:59,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:59,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:59,494 INFO L87 Difference]: Start difference. First operand 214 states and 542 transitions. Second operand 10 states. [2019-12-27 15:11:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:02,386 INFO L93 Difference]: Finished difference Result 266 states and 633 transitions. [2019-12-27 15:11:02,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:02,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:02,387 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:11:02,387 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:11:02,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=185, Invalid=414, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:11:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:11:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 213. [2019-12-27 15:11:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-27 15:11:02,392 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-27 15:11:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:02,392 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-27 15:11:02,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-27 15:11:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:02,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:02,392 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:02,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:02,593 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 195 times [2019-12-27 15:11:02,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:02,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117279719] [2019-12-27 15:11:02,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:02,672 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 15:11:02,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117279719] [2019-12-27 15:11:02,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618304335] [2019-12-27 15:11:02,673 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 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 15:11:02,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:02,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:02,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:02,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:11,038 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 15:11:11,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:11,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:11,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [793983344] [2019-12-27 15:11:11,038 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:11,039 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:11,041 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:11,041 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:11,042 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:11,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:11,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:11,042 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 10 states. [2019-12-27 15:11:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:15,295 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2019-12-27 15:11:15,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:15,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:15,296 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:11:15,296 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:11:15,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=201, Invalid=446, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:11:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:11:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 214. [2019-12-27 15:11:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 543 transitions. [2019-12-27 15:11:15,300 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 543 transitions. Word has length 14 [2019-12-27 15:11:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:15,300 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 543 transitions. [2019-12-27 15:11:15,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 543 transitions. [2019-12-27 15:11:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:15,301 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:15,301 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:15,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:15,502 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 196 times [2019-12-27 15:11:15,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:15,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561174103] [2019-12-27 15:11:15,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:15,588 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 15:11:15,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561174103] [2019-12-27 15:11:15,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67067690] [2019-12-27 15:11:15,589 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 15:11:15,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:15,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:15,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:15,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:27,889 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 15:11:27,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:27,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:27,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [866952540] [2019-12-27 15:11:27,890 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:27,890 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:27,893 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:27,893 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:27,894 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:27,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:27,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:27,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:27,895 INFO L87 Difference]: Start difference. First operand 214 states and 543 transitions. Second operand 10 states. [2019-12-27 15:11:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:36,255 INFO L93 Difference]: Finished difference Result 271 states and 644 transitions. [2019-12-27 15:11:36,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:36,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:36,257 INFO L225 Difference]: With dead ends: 271 [2019-12-27 15:11:36,257 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 15:11:36,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=186, Invalid=409, Unknown=5, NotChecked=0, Total=600 [2019-12-27 15:11:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 15:11:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 212. [2019-12-27 15:11:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:11:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-27 15:11:36,261 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-27 15:11:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:36,261 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-27 15:11:36,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-27 15:11:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:36,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:36,262 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:36,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:36,462 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash -734493315, now seen corresponding path program 197 times [2019-12-27 15:11:36,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:36,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420655364] [2019-12-27 15:11:36,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:36,539 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 15:11:36,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420655364] [2019-12-27 15:11:36,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805637431] [2019-12-27 15:11:36,539 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 15:11:36,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:36,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:36,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:36,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:36,724 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 15:11:36,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:36,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:36,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259423429] [2019-12-27 15:11:36,725 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:36,725 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:36,727 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:36,728 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:36,728 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:36,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:36,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:36,729 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 10 states. [2019-12-27 15:11:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,018 INFO L93 Difference]: Finished difference Result 265 states and 630 transitions. [2019-12-27 15:11:37,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:37,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,019 INFO L225 Difference]: With dead ends: 265 [2019-12-27 15:11:37,019 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 15:11:37,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 15:11:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 214. [2019-12-27 15:11:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 544 transitions. [2019-12-27 15:11:37,024 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 544 transitions. Word has length 14 [2019-12-27 15:11:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,024 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 544 transitions. [2019-12-27 15:11:37,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 544 transitions. [2019-12-27 15:11:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,024 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,024 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:37,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:37,225 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash -734493470, now seen corresponding path program 198 times [2019-12-27 15:11:37,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:37,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919695791] [2019-12-27 15:11:37,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:37,306 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 15:11:37,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919695791] [2019-12-27 15:11:37,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174001815] [2019-12-27 15:11:37,307 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 15:11:37,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:37,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:37,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:37,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:37,520 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 15:11:37,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:37,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:37,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [810679588] [2019-12-27 15:11:37,521 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:37,522 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:37,525 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:37,525 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:37,526 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:37,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:37,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:37,526 INFO L87 Difference]: Start difference. First operand 214 states and 544 transitions. Second operand 10 states. [2019-12-27 15:11:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:37,825 INFO L93 Difference]: Finished difference Result 266 states and 635 transitions. [2019-12-27 15:11:37,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:37,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:37,826 INFO L225 Difference]: With dead ends: 266 [2019-12-27 15:11:37,826 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 15:11:37,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 15:11:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 213. [2019-12-27 15:11:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 540 transitions. [2019-12-27 15:11:37,830 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 540 transitions. Word has length 14 [2019-12-27 15:11:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:37,830 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 540 transitions. [2019-12-27 15:11:37,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 540 transitions. [2019-12-27 15:11:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:37,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:37,831 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:38,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:38,031 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash -734498120, now seen corresponding path program 199 times [2019-12-27 15:11:38,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:38,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793138140] [2019-12-27 15:11:38,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,118 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 15:11:38,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793138140] [2019-12-27 15:11:38,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810954225] [2019-12-27 15:11:38,119 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 15:11:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:38,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:38,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:38,415 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 15:11:38,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:38,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:38,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659995073] [2019-12-27 15:11:38,416 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:38,416 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:38,418 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:38,419 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:38,419 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:38,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:38,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:38,420 INFO L87 Difference]: Start difference. First operand 213 states and 540 transitions. Second operand 10 states. [2019-12-27 15:11:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,764 INFO L93 Difference]: Finished difference Result 271 states and 642 transitions. [2019-12-27 15:11:42,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:42,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,765 INFO L225 Difference]: With dead ends: 271 [2019-12-27 15:11:42,765 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 15:11:42,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=186, Invalid=412, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:11:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 15:11:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2019-12-27 15:11:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 544 transitions. [2019-12-27 15:11:42,769 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 544 transitions. Word has length 14 [2019-12-27 15:11:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,769 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 544 transitions. [2019-12-27 15:11:42,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 544 transitions. [2019-12-27 15:11:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,770 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,970 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 200 times [2019-12-27 15:11:42,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911187909] [2019-12-27 15:11:42,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,047 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 15:11:43,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911187909] [2019-12-27 15:11:43,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160191569] [2019-12-27 15:11:43,047 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 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 15:11:43,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:43,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,281 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 15:11:43,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2100865595] [2019-12-27 15:11:43,282 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,283 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,285 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:43,285 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,286 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:43,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,287 INFO L87 Difference]: Start difference. First operand 214 states and 544 transitions. Second operand 10 states. [2019-12-27 15:11:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,573 INFO L93 Difference]: Finished difference Result 256 states and 611 transitions. [2019-12-27 15:11:43,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:43,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,574 INFO L225 Difference]: With dead ends: 256 [2019-12-27 15:11:43,574 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 15:11:43,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 15:11:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 211. [2019-12-27 15:11:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 15:11:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-27 15:11:43,579 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-27 15:11:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,579 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-27 15:11:43,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-27 15:11:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,579 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,579 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,780 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash -738961965, now seen corresponding path program 201 times [2019-12-27 15:11:43,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564252120] [2019-12-27 15:11:43,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,870 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 15:11:43,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564252120] [2019-12-27 15:11:43,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941853924] [2019-12-27 15:11:43,871 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 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 15:11:43,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:43,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:43,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,028 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 15:11:44,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [829095437] [2019-12-27 15:11:44,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,032 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:44,032 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,033 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:44,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,034 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 10 states. [2019-12-27 15:11:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:44,234 INFO L93 Difference]: Finished difference Result 269 states and 637 transitions. [2019-12-27 15:11:44,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:44,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:44,235 INFO L225 Difference]: With dead ends: 269 [2019-12-27 15:11:44,235 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 15:11:44,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 15:11:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 214. [2019-12-27 15:11:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:44,240 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:44,240 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:44,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:44,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:44,241 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:44,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,444 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -738962120, now seen corresponding path program 202 times [2019-12-27 15:11:44,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:44,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351410339] [2019-12-27 15:11:44,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,527 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 15:11:44,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351410339] [2019-12-27 15:11:44,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545732973] [2019-12-27 15:11:44,528 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 15:11:44,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:44,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:44,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:50,775 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 15:11:50,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:50,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:50,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1974735816] [2019-12-27 15:11:50,775 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:50,776 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:50,786 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:50,786 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:50,787 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:50,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:50,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:50,787 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:55,341 INFO L93 Difference]: Finished difference Result 281 states and 661 transitions. [2019-12-27 15:11:55,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:55,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:55,342 INFO L225 Difference]: With dead ends: 281 [2019-12-27 15:11:55,342 INFO L226 Difference]: Without dead ends: 280 [2019-12-27 15:11:55,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=201, Invalid=446, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:11:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-12-27 15:11:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 213. [2019-12-27 15:11:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:11:55,346 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:11:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:55,347 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:11:55,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:11:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:55,347 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:55,347 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:55,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:55,548 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash -738966770, now seen corresponding path program 203 times [2019-12-27 15:11:55,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:55,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002835865] [2019-12-27 15:11:55,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:55,641 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 15:11:55,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002835865] [2019-12-27 15:11:55,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857393187] [2019-12-27 15:11:55,642 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 15:11:55,686 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:55,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:55,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:55,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:55,839 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 15:11:55,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:55,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:55,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [274403329] [2019-12-27 15:11:55,840 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:55,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:55,843 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:55,843 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:55,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:55,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:55,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:55,845 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:11:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:56,193 INFO L93 Difference]: Finished difference Result 272 states and 641 transitions. [2019-12-27 15:11:56,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:56,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:56,194 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:11:56,195 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:11:56,195 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 15:11:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:11:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 214. [2019-12-27 15:11:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:56,198 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:56,198 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:56,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:56,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:56,199 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:56,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,400 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:56,400 INFO L82 PathProgramCache]: Analyzing trace with hash -738966925, now seen corresponding path program 204 times [2019-12-27 15:11:56,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:56,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661545514] [2019-12-27 15:11:56,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:56,482 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 15:11:56,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661545514] [2019-12-27 15:11:56,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683262567] [2019-12-27 15:11:56,483 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 15:11:56,530 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:56,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:56,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:56,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:56,695 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 15:11:56,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:56,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:56,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [85706510] [2019-12-27 15:11:56,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:56,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:56,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:56,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:56,700 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:56,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:56,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:56,700 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:57,039 INFO L93 Difference]: Finished difference Result 263 states and 622 transitions. [2019-12-27 15:11:57,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:57,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:57,041 INFO L225 Difference]: With dead ends: 263 [2019-12-27 15:11:57,041 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 15:11:57,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 15:11:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2019-12-27 15:11:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 15:11:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 15:11:57,045 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 15:11:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:57,045 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 15:11:57,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 15:11:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:57,045 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:57,045 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:57,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,246 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -739110920, now seen corresponding path program 205 times [2019-12-27 15:11:57,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:57,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694022442] [2019-12-27 15:11:57,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,324 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 15:11:57,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694022442] [2019-12-27 15:11:57,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855801288] [2019-12-27 15:11:57,325 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 15:11:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:57,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:57,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:57,486 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 15:11:57,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:57,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:57,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [53800652] [2019-12-27 15:11:57,487 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:57,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:57,489 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:57,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:57,490 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:57,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:57,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:57,491 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 10 states. [2019-12-27 15:11:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:57,731 INFO L93 Difference]: Finished difference Result 272 states and 644 transitions. [2019-12-27 15:11:57,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:57,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:57,732 INFO L225 Difference]: With dead ends: 272 [2019-12-27 15:11:57,732 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 15:11:57,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 15:11:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 214. [2019-12-27 15:11:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:57,737 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:57,737 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:57,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:57,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:57,737 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:57,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:57,938 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -739111075, now seen corresponding path program 206 times [2019-12-27 15:11:57,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:57,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626093726] [2019-12-27 15:11:57,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:58,017 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 15:11:58,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626093726] [2019-12-27 15:11:58,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916900338] [2019-12-27 15:11:58,017 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 15:11:58,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:58,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:58,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:58,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:58,211 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 15:11:58,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:58,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:58,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1754589859] [2019-12-27 15:11:58,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:58,213 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:58,215 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:58,215 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:58,216 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:58,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:58,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:58,217 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:58,584 INFO L93 Difference]: Finished difference Result 264 states and 623 transitions. [2019-12-27 15:11:58,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:11:58,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:58,586 INFO L225 Difference]: With dead ends: 264 [2019-12-27 15:11:58,586 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 15:11:58,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:11:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 15:11:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 213. [2019-12-27 15:11:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 15:11:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-27 15:11:58,590 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-27 15:11:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:58,598 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-27 15:11:58,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-27 15:11:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:58,598 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:58,598 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:58,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:58,799 INFO L410 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash -739115725, now seen corresponding path program 207 times [2019-12-27 15:11:58,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:58,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326985574] [2019-12-27 15:11:58,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:58,881 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 15:11:58,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326985574] [2019-12-27 15:11:58,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137517144] [2019-12-27 15:11:58,882 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 15:11:58,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:58,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:58,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:11:58,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:59,004 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 15:11:59,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [359319971] [2019-12-27 15:11:59,005 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:59,006 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:59,008 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:59,008 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:59,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:59,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:59,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:59,010 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 10 states. [2019-12-27 15:11:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:59,233 INFO L93 Difference]: Finished difference Result 261 states and 621 transitions. [2019-12-27 15:11:59,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:59,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:59,235 INFO L225 Difference]: With dead ends: 261 [2019-12-27 15:11:59,235 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 15:11:59,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 15:11:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2019-12-27 15:11:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 15:11:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 15:11:59,239 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 15:11:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:59,239 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 15:11:59,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 15:11:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:59,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:59,239 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:59,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:59,440 INFO L410 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash -739115880, now seen corresponding path program 208 times [2019-12-27 15:11:59,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:59,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187084236] [2019-12-27 15:11:59,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:59,516 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 15:11:59,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187084236] [2019-12-27 15:11:59,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096830460] [2019-12-27 15:11:59,517 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 15:11:59,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:59,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:59,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:59,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:59,692 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 15:11:59,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:59,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:59,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187044588] [2019-12-27 15:11:59,693 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:59,694 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:59,695 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:59,695 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:59,696 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:59,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:59,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:59,697 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 10 states. [2019-12-27 15:11:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:59,890 INFO L93 Difference]: Finished difference Result 239 states and 574 transitions. [2019-12-27 15:11:59,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:59,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:59,891 INFO L225 Difference]: With dead ends: 239 [2019-12-27 15:11:59,891 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 15:11:59,891 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 15:11:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 15:11:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 210. [2019-12-27 15:11:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 15:11:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-27 15:11:59,895 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-27 15:11:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:59,895 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-27 15:11:59,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-27 15:11:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:59,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:59,896 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2019-12-27 15:12:00,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,096 INFO L410 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -733749714, now seen corresponding path program 209 times [2019-12-27 15:12:00,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:00,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792919359] [2019-12-27 15:12:00,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2019-12-27 15:12:00,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008758470] [2019-12-27 15:12:00,102 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 15:12:00,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:12:00,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:00,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:00,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:00,146 WARN L209 SmtUtils]: Removed 1 from assertion stack [2019-12-27 15:12:00,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:00,347 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 15:12:00,351 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 15:12:00,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:12:00 BasicIcfg [2019-12-27 15:12:00,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:12:00,353 INFO L168 Benchmark]: Toolchain (without parser) took 292840.70 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 100.8 MB in the beginning and 136.7 MB in the end (delta: -35.9 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,353 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.80 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 100.4 MB in the beginning and 160.0 MB in the end (delta: -59.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.35 ms. Allocated memory is still 201.9 MB. Free memory was 160.0 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,354 INFO L168 Benchmark]: Boogie Preprocessor took 41.47 ms. Allocated memory is still 201.9 MB. Free memory was 158.0 MB in the beginning and 156.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,354 INFO L168 Benchmark]: RCFGBuilder took 422.38 ms. Allocated memory is still 201.9 MB. Free memory was 156.7 MB in the beginning and 137.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,354 INFO L168 Benchmark]: TraceAbstraction took 291629.46 ms. Allocated memory was 201.9 MB in the beginning and 202.9 MB in the end (delta: 1.0 MB). Free memory was 136.5 MB in the beginning and 136.7 MB in the end (delta: -161.8 kB). Peak memory consumption was 886.8 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:00,356 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 666.80 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 100.4 MB in the beginning and 160.0 MB in the end (delta: -59.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 75.35 ms. Allocated memory is still 201.9 MB. Free memory was 160.0 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.47 ms. Allocated memory is still 201.9 MB. Free memory was 158.0 MB in the beginning and 156.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.38 ms. Allocated memory is still 201.9 MB. Free memory was 156.7 MB in the beginning and 137.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 291629.46 ms. Allocated memory was 201.9 MB in the beginning and 202.9 MB in the end (delta: 1.0 MB). Free memory was 136.5 MB in the beginning and 136.7 MB in the end (delta: -161.8 kB). Peak memory consumption was 886.8 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 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 analyzing trace of length 15 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 291.5s, OverallIterations: 224, TraceHistogramMax: 7, AutomataDifference: 99.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2053 SDtfs, 18052 SDslu, 9871 SDs, 0 SdLazy, 5259 SolverSat, 3252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5634 GetRequests, 1702 SyntacticMatches, 1 SemanticMatches, 3931 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 15252 ImplicationChecksByTransitivity, 218.6s 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: 0.9s AutomataMinimizationTime, 223 MinimizatonAttempts, 8612 StatesRemovedByMinimization, 220 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 131.3s InterpolantComputationTime, 5681 NumberOfCodeBlocks, 5681 NumberOfCodeBlocksAsserted, 744 NumberOfCheckSat, 5240 ConstructedInterpolants, 243 QuantifiedInterpolants, 629854 SizeOfPredicates, 8 NumberOfNonLiveVariables, 20420 ConjunctsInSsa, 2429 ConjunctsInUnsatCore, 441 InterpolantComputations, 7 PerfectInterpolantSequences, 42/3452 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